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Vacuum drum filter safety requirements analysis Drum vacuum filter, English: rotaryvacuumdisk-fiter. A type of continuous filter. The construction is similar to the drum vacuum filter and the operating principle is the same. A negative pressure is used as a filter to filter the continuous filter on the surface of the cylindrical drum. This filter was originally used in the alkali and mining industries, and later extended to the chemical, coal and sludge dewatering sectors. 1 When the system is in normal operation, the granulated water volume, the amount of purge air, the amount of sweep water, the maximum water temperature of the granulator and the slag flow rate shall reach the design specifications. 2 When the system is running, the equipment inspection should meet the following requirements: the equipment is not abnormal, the granulation head is not blocked, the tank grille is free of slag blocks, the high and low ditch, the slag gate is in a reasonable state, there is no slag in the hot water tank, and there is no slag in the pit. Water and slag, no leaks in each pipeline valve, smooth tape transportation, no deviation, normal water level. 3 The slag ditch used in the tapping shall have the conditions for diverting the dry slag or other measures for treating the slag. The time for diverting the shunt shall not exceed 3 min. 4 During normal production, the operation of the system equipment should be automatically controlled. 5 The system should be started 20 minutes before the tapping, and the signal is [ready", and the operating room can start the system. A startup fails and should not be started immediately. 6 When the system is in danger of personal injury and equipment safety, stop the system operation immediately and pour the hot residue into the dry slag pit or slag tank. 7 When the iron is discharged, there should be no people near the slag ditch and the granulator. 8 should pay close attention to the amount of granulated water in the system. If it is found that the amount of granulated water is greatly reduced, the drum is faulty, the tape is heavily watered, or the operating room signal has a [big alarm", it should be immediately diverted to the dry slag pit or slag tank to prevent the liquid slag from entering the granulation system. After the iron (slag) port is blocked for 20 minutes, the system can stop running. After 10 system shutdown, the pump power supply should be stopped first, then the granulation head, water slag ditch, receiving tank and granulating water pump should be inspected and cleaned. To check or replace or clean the nozzle, stop the hydraulic system (close the hydraulic valve). Check the belt, first stop the belt conveyor power supply. 11 System maintenance personnel should not short-circuit various protection devices of the system. If equipment abnormalities or accidents are found, they should be quickly judged and handled to prevent accidents from expanding; and abnormal phenomena and accidents should be recorded, and relevant leaders should be reported. 12 Various interlocking and protection devices of the system shall not be adjusted freely without the consent of the competent department; if adjustment is required, it shall be approved by the competent department and reported to the professional director for approval; the adjustment shall be recorded and archived. . 13 When any control handle of the system is in the [auto" position, it should not be overhauled. If you need to rotate the drum during system maintenance, you should assign a special person to operate. 14 When using the wheel method, the safety net should be set near the granulating wheel.

Cylinder vacuum filter First, the cylinder type vacuum filter Vacuum filter is cylindrical metal ore dressing plant most especially black concentrator applications dewatering equipment. According to its unloading method, it can be divided into various types. Figure 1 is a continuous filtering device that can simultaneously perform operations such as filtration, washing, and cake removal in the same rotating device. The cylinder is a cast or steel plate welded cylinder whose outer surface is divided into a plurality of filter chambers by a grooved lattice plate. The filter cloth is covered on the grid plate. The lower part of the cylinder is immersed in the slurry tank and is rotated around the horizontal axis by the gear system. The size of the filter chamber should not be too wide, generally not exceeding 550 mm. The number is related to the diameter of the cylinder. When the diameter is large, the outer surface area of the cylinder is large, and the number of filter chambers is correspondingly increased. Conversely, the number of filter chambers is correspondingly reduced. For example, a commonly used 40 m 2 filter has 24 filter chambers. The outer filter type vacuum filter uses a scraper to drop the filter cake. The filter cloth is fastened to the filter plate by means of a wire . These wires also serve to prevent the filter cloth from being scratched by the scraper. The outer filter vacuum filter has a stirrer in the slurry tank, which is located below the cylinder and is driven by the bevel gear and the chain. When the agitator is working, the slurry can be kept in suspension in the trough. The number of times of agitation depends on the nature of the material, and is generally 20-60 beats/min. For materials with a large particle size and coarse density, the number of stirrings can be large. The dispensing head is an important part of the filter. The filtrate is discharged through it, and suction and pressure are alternately carried out during the filtration process, so that the slurry forms a filter cake, and is changed from a vacuum suction state to a compressed air blow state, thereby effectively controlling the order of the filtration operation. The dispensing head is divided into two types: planar contact type and cylindrical surface contact type. Cylindrical surface dispensing heads are not easily repaired after wear. It is easy to get stuck by the ore particles and is used less. Most filters use a flat distribution head. In order to facilitate maintenance, the flat distribution head disk and the gas disk are often made to be in direct contact with the wearing parts. Figure 1 Structure of the barrel type external filter vacuum filter 1. Cylindrical body transmission device; 2. Dispensing head; 3. Cylinder body; 4. Bearing seat; 5. Scraper; 6. Slurry trough; 7, stirring transmission device; 8, agitator; 9, winding device The cylindrical external filter vacuum filter can be divided into the following working areas according to the filter cake forming process. as shown in picture 2. Figure 2 Working diagram of the cylindrical external filter vacuum filter 1, the filter chamber; 2, the distribution valve; 3, 4, the tube connected to the vacuum pump; 5, 6, the pipe connected to the air compressor; 7, washing water pipe [next] Filter zone I. The cylinder in this zone is immersed in the slurry, and the filter chamber formed between the filter cloth and the grid plate is evacuated, and the filtrate is sucked into the filter chamber through the filter cloth, and then discharged through the dispensing head. The solid material and residual moisture are adsorbed on the surface of the filter cloth. Sucking area II. In this area, the remaining filtrate is drained and the filter cake is blotted dry. Washing area IV. In this zone, fresh water is sprayed on the filter cake by the tube 7, and after filtering the filter cake, it is sucked into the filter chamber, discharged through the tube 3 together with the filtrate or separately discharged by the tube 4. Blow in the area VI. In this zone, the filter chamber communicates with the compressed air, and the compressed air blows the filter cake to facilitate unloading. Discharge zone VIII. In this zone, the filter cake is peeled off by the scraper. In the figure, III, V, VII, and IX are non-working areas and are located between II, IV, VI, and VIII. Therefore, when the filter chamber is changed from one zone to another, it does not communicate with each other. The beneficiation product usually does not require washing, so when the concentrator uses a vacuum filter, the washing zone is incorporated into the blotting zone. Each cycle of the dipping filter, under the adjustment of the dispensing head with the vacuum tube, the cycle of filtration, dehydration, blow drying and filter cloth cleaning is gradually completed. The specifications and technical performance of the commonly used tubular external filter vacuum filter are listed in Table 1. Table 1 Technical data of cylinder type external filter vacuum filter Model Cylinder size, mm Filtration area m 2 Cylinder speed, r/min Stirring times Times / min Diameter × length Group I Group II GW-20 2500×2650 20 0.14, 0.19, 0.27, 0.38, 0.54 25 or 45 GW-30 3350×3000 30 0.12 0.16 0.23 0.29 0.39 0.56 0.11 0.14 0.21 0.26 0.34 0.5 GW-40 3350×4000 40 GW-50 3350×5000 50 GW-3 1600×700 3 0.13-0.7 GW-5 1750×970 5 0.13-0.7 Model With electric motor, kW Dimensions, mm Weight t Cylinder Blender Length × width × height GW-20 -8/4/2.5/4.0 2.2 4480×4085×2890 10.6 GW-30 3.5/4.0/5.0 3 5200×4910×3743 17.2 GW-40 6200×4910×3743 19.5 GW-50 4 7200×4960×3743 twenty one GW-3 1.1 3.43 GW-5 1.1 5.5 Second, the cylinder type internal filter vacuum filter The inner surface of the cylinder of the cylindrical internal filter vacuum filter is its filtering surface. The slurry is fed to the inside of the cylinder, and the coarse material is deposited on the filter cloth before the particles due to gravity. A coarse particle layer with a large gap is formed, and as the fine particle material is deposited, a "bridging phenomenon" occurs in the pores, so that particles having a diameter smaller than the pores can be stopped, thereby improving the filtration effect. In the cake layer filtration, the main function of separation is the filter cake layer, not the filter medium. Therefore, when the filter type vacuum filter is formed into a filter cake, in addition to relying on the vacuum, the material can be settled by means of material sedimentation, and a high production capacity can be obtained by filtering the material elbow which is easy to settle. This is particularly suitable for the filtration of coarse-grained materials and magnetite which is particularly severe in magnetic agglomeration. In addition, the filter has a large filter cloth cleaning area, and the filter cake can be removed to have a longer cleaning room to restore the permeability of the filter cloth. [next] The structure of the cylindrical internal filter type vacuum filter is shown in Figs. 3 and 4. The working principle is the same as that of the external filter vacuum filter. The inner filter surface of the internal vacuum filter is divided into a plurality of filter chambers, and the filter chamber is pumped and blown through a vacuum tube. The vacuum tube is connected to the dispensing head, and the dispensing head works in the same way as the external filter vacuum filter. The cylinder rotates for one week, and the circulation process of filtering, dehydrating, blowing, unloading, and cleaning the filter Ma Daha can also be completed, as shown in FIG. 5 . Figure 3 barrel type internal filter vacuum filter (center tape unloading) 1, tape; 2, cylinder; 3, distribution head; 4, roller; 5, transmission Figure 4 cylinder type internal filter vacuum filter (slot discharge) 1. Dispensing head; 2. Roller; 3. Unloading device; 4. Cylinder; 5. Transmission device Figure 5 type internal filter vacuum filter working principle diagram I, filtration zone; II, dewatering zone; III, discharge zone; IV, filter cloth cleaning zone 1, cylinder; 2, roller; 3, funnel; 4, belt conveyor; 5, filter cake; 6, pulp There are two types of filter cake discharge methods for the cylindrical internal filter vacuum filter. One is to use a fixed chute with diabase lining to send the falling cake directly to the silo outside the silo. The discharging method is convenient to operate, the device structure is simple, and the multi-small filter is used; the other discharging method is the center belt conveyor discharging. This unloading method works reliably, and it is convenient for collecting belt conveyors and weighing scales when working in multiples. The disadvantage of the cylindrical internal filter vacuum filter is that it is troublesome to replace the filter cloth, the body is large, and the working condition in the observation machine is inconvenient during operation. The specifications, performance and technical parameters of the cylindrical internal filter vacuum filter produced in China are listed in Table 2. Table 2 Performance of cylindrical internal filter vacuum filter model Dimensions, length, width and height; mm Filtration area m 2 Cylinder speed, r/min Cylinder drive power kW Unloading method Belt conveyor drive rate, kW Weight t high speed Medium speed Low speed GN-8 GN-12 3200×3200×3400 3200×3200×3400 8 12 0.72 1.0 1.43 0.49 0.69 0.96 0.31 0.47 0.68 2.2 Center belt conveyor or chute 1.5 7 GN-20 5200×3900×4100 20 0.42 0.56 0.12 0.17 3.5 2.2 13 14 Center belt conveyor GN-30 6300×3900×4100 30 0.84 1.04 0.25 0.31 4.0 GN-40 6800×3900×4100 40 1.40 2.18 0.42 0.66 5.0 3.

Combined baler/bundle packing machine Patent Name Combined Balers/Bundle Packaging Machines Patent Applicant WELLMATION CO., LTD. Principal Applicant, Ireland Mayo County Inventor P.C. McHale; M.W. McHale; J.J. N.G.P. Sheridan; P. T. O'Connor; J.P. Bikins Application (Patent) No. 02809705.X Date of Application 2002.03.22 Certification Date Approval Notice No. 1531392 Audit Day 2004.09.22 Specification CD-ROM D0438 Main classification number A01F15/07 Classification No. A01F15/07 Sub-item Original Application No. Priority Citation Abstract A combined baler/bundle packing machine (1) including a chassis (5) on which the chassis is mounted There are balers (10) and bale packing machines (11). The baler (10) comprises a fixed part (18), a lower part (19) and an upper part (20) each carrying a bale forming roll (25), the roll (25) defining the bale forming chamber (15), a circular material A bundle (2) is formed inside the chamber (15). The lower part (19) and the upper part (20) are respectively rotated around the first and second pivots (35), (40) from the bale forming position (Fig. 5) to the unloading position (Fig. 1) to directly move the bale from The bale forming chamber (15) is sent upwards and backwards to the first and second stock support rollers (50) in the bale wrapping machine (11). The bale support roller (50) rotates the bale (2) about the first package axis (53), while the carrying ring (55) rotates a pair of wrapping material dispensers (54) about the second horizontal package axis (56) to The packaging material is dispensed onto the bale (2) to pack it. The combined baler/bundle packer is efficient, compact and small in length. Sovereignty Item 1. A modular baler/binder wrapper for forming a cylindrical bale and packaging it with a wrapping material, the baler/bundling baler including a bale for forming bales Machine, the baler having a bale forming chamber, a bale formed therein, a bale wrapping device for receiving the bale from the baler, wrapping it, and a conveying device for feeding the bale The conveying from the baler to the bale packing device is characterized in that the conveyor device conveys the bale from the bale forming chamber to the bale packing device in a generally upwards and outwards direction.

Polished Finish Gravity Screen Operation Slurry is gravity fed or pumped to the headbox, where it over flows the weir and flows downward on the screen. As the flow accelerates, the slurry attaches to the screen bars and passes through the openings. Solids greater than the opening are retained on the screen surface where they build kinetic energy and roll downward off the screen for reuse or disposal. With free drainage material, most of the free fluid is removed in one pass. You can count on CCMC experienced technical engineers to design or retrofit your gravity screen system. Options Hinged doors and covers Bottom effluent connection 316L stainless steel construction Flanged connections Solids discharge chute Clean-out ports Flush header

Screen Gap 0.25-2.5mm Rotary Drum Filter Press in Water Treatment Trademark: MYEP Origin: China HS Code: 84211910 Trademark: MYEP Origin: China HS Code: 84211910 Screen Gap 0.25-2.5mm Rotary Drum Filter Press in Water Treatment Product Application The Bar Screen is installed at the inlet of water treatment system. It is composed of pedestal, specific plough shaped tines, rake plate, elevator chain and motor units etc. It is assembled into different space according to different flow rate or channel width.The rake plate ,which is fixed in the elevator chain,starts clockwise movement under the drive of the driving device, hooking residue from down to up together with the elevator chain. Under the effect of steering guide and guiding wheel, residue gets discharged by gravity while the rake plate reached the top of bar screen. The rake tines moved to the bottom of the equipment and starts to work for another round, residue moves continuously. Product Display Bar Screen Produced by MYEP has the following Advantages: -High Separation Efficiency -Simple structure with compact size, easy to install and move -Overload safety device. It can cut the shear pin when screen is overloaded -Excellent self-cleaning ability with realiable operation Components Display Model Selection Data\Model GS-300 GS-400 GS-500 GS-600 GS-700 GS-800 CGS-900 GS-1100 GS-1200 GS-1250 CW-1500 Install angle( a) 60°~80° Power (kw) 0.37~0.75 0.55~1.1 0.75~1.5 1.1~2.2 1.5~3 Screen Speed ( m/min) About 2 Width w0(mm) 300 400 500 600 700 800 900 1100 1200 1250 1500 Height H0 (mm) H+H1+1350 Total width W1 (mm) 650 750 850 950 1050 1150 1250 1450 1550 1600 1850 Ditch width U (mm) 400 500 600 700 800 900 1000 1200 1300 1350 1600 Ditch depth H (mm) Decided by user For Precise Model Selection, Please kindly provide information: 1.Channel depth 2.Width of screen 3.Discharge height 4.Water flow per hour 5.Screen slot Why Us SATISFACTORY SERVICE - Quick Response Time, 7×24 hours Technical Consultation - Feel Free to consult, customized solution for your application. - Engineers are available to service machinery overseas. - Factory audit is welcomed - Our extinguished clients include BASF, Tialoc and CNPC. - Train how to install and operate the machine. - Complete video operation tutorial ADVANCED DEWATERING TECHNOLOGY - Design for Dewatering Applications - R&D Cooperation with Tsinghua University - Superior Raw Materials - Laser cutting adopts Trumpf technology and the anti-corrosion materials adopts Starck technology - First professional screw press production line in China FAQ Q1. Are you a factory or a trading company? A: We belong to a factory, so we can control every aspect of the product and provide best quality with lowest price for you. Q2. How do you ship the goods and how long does it take to arrive? A: Airline and sea shipping also optional. Shipping time depends on distance. Q3. Is it OK to print my logo on the product? A: Yes, but inform us formally before our production. Q4. Is there any other equipment used in sludge treatment? A: Yes, including polymer dosing system, sludge thickener, conveying device, rotary drum screen, coarse screen, paddle dryer, dissolved air flotation, sludge scraper bridge and etc. If you are interested, contact us for further information.

Rotary vane vacuum pump structure_ Rotary vane vacuum pump structure diagram In fact, after you understand the working principle of rotary vane vacuum pump, look at rotary vane vacuum pump structure is actually not complicated. Rotary vane vacuum pump structure is as follows: Rotary vane vacuum pump structure diagram Rotary vane vacuum pump structure Rotary vane vacuum pump structure As Xiaobian demonstrated above, rotary vane vacuum pump is used in the process of eccentric mounted on the stator Sliding within the rotor and rotor slots in the chamber, and due to the tension and centrifugal force generated by the springs inside it, are in close contact with the two tabs of the inner wall, which are always along the stator Inner wall sliding. The above structure on the rotary vane vacuum pump for your reference.

Gridless vacuum filter The filterless filter is a cylindrical external filter vacuum filter, and the cylinder body is a whole vacuum chamber, and the cylinder body has a special sealing chamber in the discharge area. The machine eliminates the distribution head, throat and a large number of vacuum lines of the general filter, and is a new type of continuous filter. It is mainly composed of a cylinder, a sealing device, a hollow shaft, a stirrer, a slurry tank and the like. The structure and division of the work area are shown in the figure below. When the filter is not working, the inside of the cylinder is under vacuum, so that the filter cake is adsorbed on the surface of the filter cloth, and the filtrate and the washing water are respectively extracted from the two ends of the hollow shaft, and the filter cake runs with the filter cloth. The discharge roller is detached. The machine does not need to blow the material and clean the filter cloth on the cylinder. Therefore, the function of the sealing device is to seal the filter hole on a section of the cylinder exposed from the air (between the point where the filter cloth is taken out to the return point of the filter cloth) to prevent the vacuum from being broken. Another feature of the filter structure is that the feed tank adopts a deep groove structure to increase the suction filtration time to increase the production capacity. At the same speed, the suction filtration time of the GDU-40 type non-folding belt filter is 1/3 to 2/3 higher than that of the general external filter type vacuum filter.

Application of Rotary Vacuum Filter in Alumina Industry Application of Rotary Vacuum Filter in Alumina Industry Core Tip: Application of light metal equipment* rotary table vacuum filter in alumina industry Chen Changlin, Ma Hong (Jiangsu Xinhong Dashan Petrochemical Machinery Co., Ltd., Xinghua 225721, Jiangsu, China) Industry, This article describes the application of the filter in the aluminum industry, and Comparison with imported filter u: Rotary vacuum filter; Separation Application of Light Metal Equipment* Rotary Vacuum Filter in Alumina Industry Chen Changlin, Ma Hong (Jiangsu Xinhong Dapei Petrochemical Machinery Co., Ltd., Xinghua 225721, Jiangsu, China) Industry, This article describes the application of this filter in the aluminum industry, and it is also used in import filtration. The machine was compared u: rotary vacuum filter; separation; filter cake alumina production process, the decomposition process of aluminum hydroxide slurry separation and washing requires the use of separation and filtration devices. The traditional separation equipment includes rotary drum vacuum filter and belt filter. In recent years, it has gradually been replaced by imported rotary vacuum filter. The following describes the working principle and structural features of the turntable vacuum filter produced by our factory. The buckets are spliced into a horizontal ring-shaped filter plane, and the filter cloth is coated on the filter surface. According to the size of the filter, the support beams for the filter bucket are different. It is mounted on the drive pin wheel and drives the pin wheel through the gear reducer of the motor. The filtering surface of the filter is used for horizontal rotation. Rotary vacuum filter working principle and structure as shown. 1 working principle and structure of the rotary vacuum filter The rotary filter of the rotary vacuum filter is composed of several fan-shaped filter rotary disc vacuum filter structure diagram (elevation) Each fan shaped filter bucket has a discharge pipe under the vacuum chamber. These discharge tubes are collected in a filtrate manifold, and the filtrate manifold of each fan-shaped filter cartridge is connected to a gas center distribution valve using an acid-resistant hose. The circular filter surface is determined according to the process performance using a steel plate made of a cylindrical shape, so that the fixed internal and external cylinders, the filter surface and the barrier between the working areas form a volume cavity, so that the filter is added Slurry, washing liquid will not overflow and string position. When the filter slurry added by the filter is vacuum-filtered and washed to form a filter cake, the screw discharge device on the filter surface will push the filter cake from the inner ring to the outer edge and fall into the flooding tank, leaving the filter cloth. There is a small amount of cake on the filter cloth that can be regenerated by back blowing. The central distribution valve is divided into upper and lower layers. The upper distribution valve rotates synchronously with the filter plate. The lower distribution valve is fixedly installed on the center column. There is a wear-resistant seal between the upper and lower distribution valves. When they are rotated relative to each other, the seal is kept airtight under the effect of vacuum. According to the process requirements of filtration production, the lower distribution valve is provided with a continuous operation zone such as a filtrate zone, a washing zone, a secondary washing zone, a slag discharge zone, a filter cloth regeneration zone, etc. Each operation zone is corresponding to a vacuum system. A slurry hopper corresponding to the operation area of the center distribution valve is provided on the filter surface of the rotary vacuum filter, and the filter slurry is uniformly distributed on the filter surface. Under the action of vacuum, the liquid and the solid are separated and the liquid is separated. Downstream through the filter cloth to the vacuum filter, the solids form a cake on the filter cloth. The washing liquid is evenly sprinkled on the cake surface with a lotion dispenser for washing. Between the different working areas, the filter surface is suspended above the filter surface, and the liquid does not mix the cantilever arms between each area, which affects the flatness of the filter plate, thereby ensuring the smoothness of the filter during operation. (5) Drive pin wheel: This is a steel circular ring rotation part. The drive pin wheel has drive pin teeth. (6) Supporting roller: A plurality of supporting rollers are arranged in an annular supporting plane which supports a steel rail which drives the lower bottom surface of the pin wheel so that the driving pin wheel rotates horizontally on the supporting horizontal surface of the supporting roller. (7) Screw unloading device: The spiral unloading device consists of an electric motor, a speed reducer, and a multi-head large pitch screw unloader. One end is mounted on the central operating platform of the center column and the other end is mounted on the floor support on the outer edge of the filter. The installation height can be adjusted to maintain a proper distance between the bottom of the spiral and the cloth surface. (8) Filtrate Dispenser: It distributes the slurry evenly on the filter cloth Table Rotary disk Vacuum filter structure diagram (plane) 2 Rotary disc vacuum filter Structure Description (1) Drive device: The drive device is composed of a motor, a speed reducer, and a star wheel. In addition, it is equipped with a frequency converter for the motor to adjust the speed of the motor. (2) Retainer: Installed inside the drive pin, the rotation center of the drive pin wheel is set in the axis of the circle formed by a plurality of stop wheels. (3) The fan-shaped filter hopper: The main unit of filtration, spliced by a number of fan-shaped filter hoppers into a horizontal circular filter surface, the filter surface is covered with a filter cloth. Each fan-shaped filter hopper consists of a vacuum chamber, a discharge pipe, and a filtrate manifold. (4) Floating support beam: The floating support beam is installed on the top surface of the driving pin wheel, which supports the filter bucket to keep horizontal stability and is driven by the driving pin wheel to rotate synchronously. The floating support structure of the support beam ensures that the expansion displacement of the filter bowl is not limited. Overcomes the entire filter surface and also prevents the solids in the slurry from depositing in the slurry hopper. (9) Stopper: The stopper consists of a baffle holder and a rubber baffle, which separates the liquid between two different work areas so that they do not collude with each other. 3 Application of Vacuum Filter in Alumina Industry Jiangsu Xinhongda Company successively is Chongqing Nanchuan Alumina Factory (HDZP * 30, 1), Pingdingshan Huiyuan Chemical Industry Company (HDZP-30, 1), Chongqing Dingtai Tuoyuan Alumina Development Co., Ltd. has 2 sets) and Guizhou Qingzhen Alumina Plant (HDZP 55-1) has provided a rotary vacuum filter, which has a good use effect. The following uses the HDZP-55m2 filter in Guizhou Qingzhen Alumina Factory as an example to describe its performance indicators: (1) Total filter area: 55m2 Effective filtration area: 46m2 (2) Vacuum: Absolute pressure ~ 34kPa (3) Filter rotation speed: 2 ~5min/r (4) Feeding device: 1 set (5) Lottery device: 2 sets (6) Filter Rotary Diameter: (Outer Disk Diameter) Y900 (7) Drive Motor Power: 7.5kW (8) Unloading Screw Motor Power: 11kW (9) Dial Accuracy Requirement: Rotor Diameter Deviation: *2mm inner diameter deviation of turntable: *2mm flatness of turntable: *1. 5mm gap between turntable and material spiral: +5 (easy to adjust) Performance of treated aluminum hydroxide slurry: ~80*C (top temperature of hot water 95 increased The vertical distance between the motor base and the suspended bearing is adjusted by using a method of reducing the thickness of the backing plate to meet the site requirements. b. Replace bearing ring and L-shaped beam with countersunk head bolt to avoid unsafe factors caused by weld cracking. c. For the uneven processing of the gutters, we made the model to correct the gutters and guide the workers to operate carefully to solve the pressing problem of the filter cloth. 6 Benefits The import price of this equipment is 1.5 million yuan more than the price of our factory. When applied to the aluminum hydroxide product filtering and washing process, the process flow is greatly simplified, and all economic indicators far exceed the 40m2 rotary drum filter: 40% reduction in filter cloth loss, 30% reduction in energy consumption, and 30% reduction in energy consumption. Small area can reduce infrastructure investment. Due to its high degree of automation, the labor intensity of the operator is reduced, and labor costs are reduced. The equipment is simple in operation, reasonable in structure, reduces the leakage of materials, is conducive to environmental protection, and has huge social benefits. 7 Conclusion Through careful production and adoption of the above improvement measures, after the alumina plant's trial operation, it proved that the equipment runs smoothly, with high filtration efficiency and low product moisture content, which satisfies production requirements well. Compared with similar imported equipment, its product performance and manufacturing precision have basically reached the international advanced level, indicating that the development of the 51m2 flat pan filter is a success and can completely replace imported products. We will summarize the successful experience of this production, further improve the design and manufacturing process of the 51m2, 40m2, and 30m2 flat pan filter, and gradually promote it throughout the country to provide a more advanced filtration facility for domestic alumina refineries. Convenient and more economical choice.

Turntable vacuum filter rotarytablefilter Zhuantaizhenkongguol port 11 rotary vacuum filter (rotarytablefilter) filter disc horizontally placed and can be rotated vacuum filter, mainly consists of horizontally placed filter discs, distribution head, screw conveyor and other components. (See a schematic diagram of a rotary table vacuum filter 1 a dispensing head; 2 a screw conveyor; 3 a filter disc diagram) The filter disc is composed of a plurality of fan-shaped filter chambers, each of which has a filtrate tube leading to the dispensing head. The dispensing head divides the filter disc into a feed zone, a dewatering wash zone, and a discharge zone. In the dewatering wash zone, the filter cake can be subjected to multiple washes, and the wash solution and filtrate can be separately collected. A screw conveyor is arranged to discharge the filter cake in the discharge area. During operation, the filter disc is driven to rotate by the driving mechanism, and each of the fan-shaped chambers sequentially performs each filtering operation under the control of the dispensing head. The rotary table vacuum filter can be used for multi-stage countercurrent washing with different washing liquids, but has the disadvantage of large floor space; it is suitable for filtering the filter slurry which requires good washing effect and contains large density coarse solid.

The vacuum filter can be basically divided into four types, namely, a cylindrical external filter type vacuum filter, a cylindrical internal filter type vacuum filter, a cylindrical magnetic vacuum filter, and a disc type vacuum filter. They work the same way. The structure of the cylindrical outer filter type vacuum filter is as shown in the figure below. The barrel is the main body of the filter. The barrel of the large filter is made of steel plate welded, the small size is made of cast cylinder, and some old-fashioned filter cylinders are made of thick wood. The outer surface of the cylinder is divided into a plurality of axially penetrating filtering chambers in the circumferential direction by the spacers, and the chamber and the chamber are tightly sealed and are not ventilated. A filter plate is placed in the filter chamber to form communication for the flow of the filtrate on the one hand and to support the filter cloth on the other hand. The section of the filter chamber is shown below. [next] A filter cloth is wrapped around the entire barrel. In order to ensure the seal between each chamber, the filter cloth is embedded in the rope groove of the spacer by a strip, a hemp rope or a brown rope. Then, a plurality of wires are wound around the outside of the cylinder at a pitch of 50 to 80 mm in the axial direction by a winding mechanism, and the filter cloth is fixed on the cylinder. At one end of the barrel there is a throat having the same number of channels as the filter chamber, each of which is connected to a corresponding one of the filter chambers via a tube. The transmission mechanism drives the barrel to rotate and can change several speeds. The dispensing head is an important part of the filter and its position is fixed. One side of the tube is in close contact with the throat and the other side has a tube connected to the vacuum pump and the blower. Through it, each filter chamber of the filter is controlled to perform filtration, filter cake dewatering, unloading, and cleaning of the filter cloth. Inside the dispensing head, there are several cavities arranged on the same circumference and spaced apart from each other to form several zones, the schematic of which is shown in the following figure. 1. Filter zone I The filter chambers in the zone are connected to the vacuum pump through a pipe. The cylinder is immersed in the slurry. The pressure difference caused by the vacuum is filtered. The filtrate is filtered through the filter cloth and then sucked into the filter chamber. The medium is discharged, and the filter residue is deposited on the filter cloth. 2. Suction dry dehydration zone II In this zone, as the vacuum pump continues to pump, the remaining liquid is sucked out to further reduce the moisture of the filter cake. 3. Blowing and unloading zone IV Each filter chamber in the zone is connected by a pipeline and a pressure blower, so that the filter chamber is changed from negative pressure to positive pressure, compressed air sucks the filter cake, and the filter cake is scraped by means of a scraper. Discharge outside the machine. 4. Filter cloth cleaning area VI In this area, the pressure fan continues to blow the filter chamber (or the blast and the water supply) to clean the filter cloth and restore its gas permeability. The zones III, V, and VII are non-operating zones, and they do not allow each other to communicate with each other when the filter chamber is changed from one zone to another zone. [next] During the rotation of the barrel, the barrel is transferred from zone I to zone VII to complete a filtration cycle. Each filter chamber works in such a manner that at each moment the filter chamber is forming a filter cake, blotting the filter cake, discharging the material, and cleaning the filter cloth. So the work of the filter is continuous. The filter cake of the cylindrical external filter type vacuum filter is discharged, and is peeled off by a scraper mounted in the discharge area. This method of unloading tends to damage the filter cloth, and compressed air must be introduced into the discharge zone during operation. In order to improve the cleaning cloth and the discharge mode, recently developed a tape off the cylindrical vacuum filter, has been successfully used in the production of gold, which is configured as illustrated. The filter cloth of the belt-type vacuum filter is wound around the filter drum, the roller, the adjustment roller like a conveyor belt, and is driven by the cylinder. After the filter cake passes through the dewatering zone, the filter cloth is taken out of the cylinder by a set of rollers for unloading and cleaning, and the cleaned filter cloth is returned to the cylinder for re-operation. The belt-type vacuum filter does not use blast discharge, thus avoiding the increase of filter cake moisture caused by backwater. Folding belt vacuum filter will take out the filter cloth out of the cylinder, and it can have enough time and take effective measures to clean the filter cloth. Generally, the two sides of the filter cloth are washed with pressurized water, and the device can be more thoroughly used with brushes and cloths. The cleaning is to ensure the permeability of the filter cloth and reduce the blockage. Folding belt filters are suitable for filtering fine, sticky pulp.

Introduction rotary table vacuum filter Turntable vacuum filter rotarytablefilter Zhuantaizhenkongguol port 11 rotary vacuum filter (rotarytablefilter) filter disc horizontally placed and can be rotated vacuum filter, mainly consists of horizontally placed filter discs, distribution head, screw conveyor and other components. (See a schematic diagram of a rotary table vacuum filter 1 a dispensing head; 2 a screw conveyor; 3 a filter disc diagram) The filter disc is composed of a plurality of fan-shaped filter chambers, each of which has a filtrate tube leading to the dispensing head. The dispensing head divides the filter disc into a feed zone, a dewatering wash zone, and a discharge zone. In the dewatering wash zone, the filter cake can be subjected to multiple washes, and the wash solution and filtrate can be separately collected. A screw conveyor is arranged to discharge the filter cake in the discharge area. During operation, the filter disc is driven to rotate by the driving mechanism, and each of the fan-shaped chambers sequentially performs each filtering operation under the control of the dispensing head. The rotary table vacuum filter can be used for multi-stage countercurrent washing with different washing liquids, but has the disadvantage of large floor space; it is suitable for filtering the filter slurry which requires good washing effect and contains large density coarse solid.

The promotion of the use of indirect drying equipment with energy saving and environmental protection features is an important trend in the development of drying technology. This article focuses on the technical innovations such as the working principle and structural characteristics of the energy-efficient tube bundle dryer. The new tube drying machine developed by Northeastern University Shenyang Yitong Venture Technology Co., Ltd. has greatly increased the thermal efficiency, 30% higher drying strength than conventional tube dryers, and the energy consumption of the equipment has reached the advanced level of similar products in China. It requires 1.2-1.5 tons of water per 1 kg of water evaporated. 1.3 kilograms of steam. The core tube of the dryer is made of high-quality boiler steel pipe (GB3087). The advanced expansion joint technology completely solves the defect that the traditional welding process is prone to fracture at the weld seam. Both ends of the semi-axis turning, the precise coaxiality greatly improves the service life of the main bearing of the tube bundle and the smooth running of the tube bundle. According to the material drying characteristic curve design, the lifting uniform distribution tube blade can make different materials achieve the best drying effect. 1 Lifting even-distribution type shovel----completely mixed state The tube bundle dryer belongs to the stirring-type conduction heat exchanger dryer, which overcomes the above thermal resistance and guarantees a good drying effect. The key factor is the degree of stirring and mixing in the drying process. Since the law of the movement of the material inside the dryer is difficult to accurately describe, the particle coverage factor fR is generally determined by the actually measured data of the actually operating dryer. Ordinary tube-bundle dryer - incompletely mixed state In an ordinary tube-bundle dryer, push-pull plates, tipping blades, and unloading shovel plates are distributed along the length direction. The main effect on the mixing state is the tipping blade. The type is lifting blade. The material began to fall at about 120°C and contacted with the heating surface of the tube bundle. After 4 contact processes, the material was removed from the heating wall to the material bed at the bottom of the dryer. This kind of blade will cause the stratification of the gas, and it will increase with the decrease of the number of rotation of the rotor and the increase of the diameter of the rotor. The advantage of using this blade is that the inner wall of the dryer is easy to clean, but the filling rate of the dryer is low, between 0.1-0.2. New tube dryer - completely mixed state In the new tube dryer, the lifted uniform shovel is designed according to the drying characteristic of the material, enabling the material to fall at various angles of rotation, and the contact with the heating wall surface of the tube bundle is rotating. From all angles, so that the material tends to be completely mixed. Improves tube surface utilization and particle coverage factor fR According to the drying characteristics of the material, in the drying process, due to the change in water content, the state and properties of the material will also change accordingly, so the form of the shovel plate should be along the length Take several spade forms in the direction. In addition, the shape and angle of the same type of shovel blade should also be changed to ensure that the material is evenly distributed across the entire cross-section and the gas stratification is destroyed. The new tube dryers are respectively arranged along the length direction of the pushing shovel plate, the tipping shovel plate, the equalizing shovel plate, and the unloading shovel plate. The main function of the mixing state is the tipping shovel plate and the uniform shovel blade. The type is: Lifting shovel board. This blade ensures that the material is well poured and spreads evenly over the entire cross section of the rotor. According to the measured values, the tube bundle surface utilization rate is increased by more than 20% compared with the conventional tube bundle dryer, and the fR is increased by more than 30% compared with the conventional tube bundle dryer. In addition, the relationship between the quantity, shape and filling factor of the shovel plate should be when the material on the shovel plate is the largest, and the material stored in the dryer should just cover the bare part of the shovel plate. The number of shovel plates is related to the diameter of the rotor. Research at the Drying Institute of Tohoku University shows that the relationship between the general number and the rotor is: n=(10~14)D (D is the diameter of the rotor). The relationship between the height hR of the blade and the diameter of the rotor is shown in the following table: 2 siphon helium ---- non-condensing water retention hopper-type scoop bucket - suitable for high-speed equipment in the condensate discharge mechanism, the common tube dryer is a spoon-type hopper, this hopper with the tube bundle rotation, The condensed water in the head enters the mouth of the bucket. When the mouth is facing upwards beyond the horizontal axis, the condensed water that falls into the bucket is discharged through the hollow shaft. The disadvantage of this kind of bucket is that there is always water in a certain horizontal plane of the tube bundle, steam exists only in the upper tube, and the condensed water in the lower tube cannot be discharged in time, which affects the steam utilization rate and thermal efficiency. At the same time, in the process of discharging the condensate, it is inevitable to take part of the steam and increase the steam loss. Siphon pick - suitable for low-speed equipment The new tube dryer replaces the common scoop-type spade bucket with a siphon, which uses the pressure difference between the vapor pressure inside the heat exchanger and the trap. The condensate flows through the bottom of the heat exchanger. The nozzle is continuously discharged. The gap between the nozzle and the bottom wall is generally controlled at 5-10mm. The diameter of the pipe is determined by the amount of condensing water. Generally, the small cylinder adopts a DN15mm and the large cylinder adopts a siphon tube of DN20-25mm; the other end is fixed in the inlet. Steam turbine components. The siphon hydrazine not only reduces the loss of steam, but more importantly there is no condensate water remaining in the bilge pipe at the bottom of the bundle. The actual heating and drying area is greatly increased, and the utilization rate of steam is increased. And this kind of bucket, in the timely discharge of condensate, basically no steam loss. 3 Jet technology ---- increase the heat transfer coefficient of the inlet section The way of entering the steam is improved from the ordinary filling mode to the jet entry mode. This is the application of the free jet enhanced heat transfer technology in the steam heat transfer. At the entrance of the wet material, the steam velocity is higher than that of other parts, thus forming a partial pulse flow of steam. On the one hand, a jet is formed on the end tube sheet, which improves the heat transfer effect of the end tube sheet, and also the layer of the inlet section. The flow state is changed to a turbulent state, which means that the increase of the steam velocity increases the local heat transfer coefficient. Convection Heat Transfer Rate Equation: Newton's Cooling Law Based on "rate equals pushing force divided by resistance", it also equals a coefficient multiplied by the driving force. Thermal fluid dQ =ds α(T-TW ) Cold fluid dQ =ds α (tW-t) Where: α: local convection heat transfer coefficient; general use average convection heat transfer coefficient Q = α S Δt m Δt m - average heat transfer temperature difference Due to the effect of local jets, the local heat transfer coefficient is correspondingly increased, and thus the heat transfer amount is increased.

The bundle is composed of a plurality of single wires. In general, the single wire constituting the bundle is many and thin, which not only increases the flexibility of the wire and cable, but also improves the reliability of the line connection. Some wire and cable conductors do not require a large cross section, but they are also twisted for better flexibility or high reliability. In order for a single wire to be bundled or stranded at a certain helix angle (or pitch), the equipment must meet the following requirements: one is to make all the single wires rotate around the central axis of the device; the other is to make the stranded product a straight line Forward movement. By changing the cooperation of the two kinds of motion speeds, the size of the spiral angle can be adjusted, so that the produced strand or beam line meets the structural requirements. The composition of the stranding machine and the beam tying machine are basically the same, and are composed of main parts such as pay-off, traction, cable and take-up, drag and drive system and control system. In addition, there are also distribution boards, parallel molds (also known as stampers), meters and other devices. The stranding specifications produced by the stranding machine are relatively large. When the twisting is performed, except for one single thread in the center, the other single-wire paying discs are placed in the pay-off part (such as the twisting cage), and the single wire is twisted around the center single wire through its rotation. Floor. According to the number of strands of the stranded wire and the number of single strands of each layer, the general stranding machine is provided with several (several sections) respectively rotating the pay-off parts, so that the layers are twisted to different strands, so the production Concentric stranded strands are particularly suitable. The wire harness produced by the wire harness machine has a small specification, and it forms a beam line by rotating the basket part or the rotating body of the wire. Since the operation of the wire harness machine is in the wire take-up part, the shifting mechanism is installed in the rotating basket, and the position is limited, which determines that the wire harness machine can only be made into a twisted, small-sized product, but the bundle The number of single wires can be flexibly configured as needed. The quality of the strand or bundle depends on the quality of the single-wire material and the additional material on the one hand and on the other hand, depending on the stranding or bunching process. There is a direct relationship between the type of stranding equipment and the structure of the stranded product, the size of the section and the outer diameter, the number of single strands, the thickness of the single strand, and the length of the stranded product. If it is a concentric stranded strand, first consider whether the number and size of the stranding disc of the stranding machine are compatible with it, and then consider the twisting direction, the pitch length and whether or not to retreat. If it is a twisted pair, it is also necessary to consider the deformation of the strand. This requires analysis of the strand structure, specifications, materials, determination of process data, and finally selection of a suitable stranding machine. In the case of bundle products, in addition to the number and size of the reel, the size of the reel of the reel is much more important than that of the stranding machine. The pitch length and twist direction of various strands and wire harnesses are specified. The pitch length can be calculated by multiplying the stranded or beam outer diameter by the practical pitch ratio. In actual production, a larger pitch ratio is generally used to maximize productivity. The twisting must be strictly carried out according to the regulations, otherwise it will affect the connection of the line. Stranding direction: the twisting direction of each layer of concentric stranding is opposite, the direction of the weaving is divided into right and left directions, and the axis of the strand is perpendicular to the chest. If the single line is inclined from the upper right to the lower left, It is right, and vice versa. In order to facilitate the memory, the palm can be lifted with the left or right hand, the thumb is forked, and the other four fingers are close together, and the four fingers are aligned in the axial direction. If the oblique direction of the right thumb coincides with the oblique direction of the single line, it is rightward (z Toward), if the diagonal direction of the left thumb coincides with the oblique direction of the single line, it is the left direction (S direction). In the product standard, not only the stranding of the strands is reversed, but also the twisting of the outermost layer is specified. Generally, the outermost strand of the bare stranded wire is rightward. Stranding rule: The stranded core is generally made of strands of the same material and diameter. In order to make the strands round, and the number of strands in the center layer is fixed, the equation is equal to the number of equations. The number of layers of the strands is 6.28 compared with the inner layer adjacent to it, that is to say, each additional layer increases by 6.28 strands, generally taking an integer of 6. Measuring the twisted pitch with a length greater than the pitch of the paper stretched on the strand, with a pencil or crayon along the strand axially drawn, a set of impressions can be obtained, the number of impressions should be more than the number of single lines of the measurement layer, Mark a center of one of them, starting from the adjacent one. When the number of numbers is equal to the number of single lines of the measurement layer, mark the center of the last numbered mark and measure the distance between the two marks. It is the pitch of the stranded wire. For the pitch measurement of the wire harness product, since the wire harness is mostly a small-diameter single wire irregularly twisted, it cannot be measured by the paper tape method. Therefore, the actual measurement method can be used, that is, a bundle of wire products is taken out, one of the surface is cut and marked at the shearing position, 10 spirals are removed in the opposite direction of the wire harness, and then 10 spiral partial strands are removed by a ruler. The length and the obtained length data are divided by 10 to obtain the pitch length of the beam line. In general, the smaller the pitch ratio, the better the softness; the smaller the gap between the individual single wires, the denser the stranding; and the larger the pitch and the actual length of a single line at a pitch, The length of the single wire used for the same length of twisted wire is longer.

Whether or not you have put together a complete set of headsets and put them out, it's just like the irritating experience of a line group. According to a report from the Australian News Network, friends who often use mobile phone headsets may have a deep understanding, that is, the headset cable is very easy to mess around together. Everyone may think that this is a very natural thing and never thought about it, but some scholars have conducted a special study and found that the headphone cords are easily tied together, mainly due to their length. Several scholars from the University of California conducted this study and also published a report specifically addressing this issue, which revealed the original data related to the tangle of the headphones . The researchers pointed out that if the headphone cord is shorter than 46 centimeters, it will never be entangled. Any headphone cable that exceeds this length can become entangled, and the longer it is, the more likely it is that it will knot into a ball. The length of 150 cm will reach the maximum probability of 50% of the cord winding. The iPhone's headphone cable is 139 cm long, so it seems to be the most easily tangled. The report also confirmed that the headset cord may indeed be wrapped and knotted in seconds, not only because your bag is too messy. Headphone cords are really easy to entangle. Xiao Bian believes that children who don't care about or have obsessive-compulsive disorder buy a wireless headset, so it's not so irritating.

Application of Rotary Vacuum Filter in Alumina Industry Core Tip: Application of light metal equipment* rotary table vacuum filter in alumina industry Chen Changlin, Ma Hong (Jiangsu Xinhong Dashan Petrochemical Machinery Co., Ltd., Xinghua 225721, Jiangsu, China) Industry, This article describes the application of the filter in the aluminum industry, and Comparison with imported filter u: Rotary vacuum filter; Separation Application of Light Metal Equipment* Rotary Vacuum Filter in Alumina Industry Chen Changlin, Ma Hong (Jiangsu Xinhong Dapei Petrochemical Machinery Co., Ltd., Xinghua 225721, Jiangsu, China) Industry, This article describes the application of this filter in the aluminum industry, and it is also used in import filtration. The machine was compared u: rotary vacuum filter; separation; filter cake alumina production process, the decomposition process of aluminum hydroxide slurry separation and washing requires the use of separation and filtration devices. The traditional separation equipment includes rotary drum vacuum filter and belt filter. In recent years, it has gradually been replaced by imported rotary vacuum filter. The following describes the working principle and structural features of the turntable vacuum filter produced by our factory. The buckets are spliced into a horizontal ring-shaped filter plane, and the filter cloth is coated on the filter surface. According to the size of the filter, the support beams for the filter bucket are different. It is mounted on the drive pin wheel and drives the pin wheel through the gear reducer of the motor. The filtering surface of the filter is used for horizontal rotation. Rotary vacuum filter working principle and structure as shown. 1 working principle and structure of the rotary vacuum filter The rotary filter of the rotary vacuum filter is composed of several fan-shaped filter rotary disc vacuum filter structure diagram (elevation) Each fan shaped filter bucket has a discharge pipe under the vacuum chamber. These discharge tubes are collected in a filtrate manifold, and the filtrate manifold of each fan-shaped filter cartridge is connected to a gas center distribution valve using an acid-resistant hose. The circular filter surface is determined according to the process performance using a steel plate made of a cylindrical shape, so that the fixed internal and external cylinders, the filter surface and the barrier between the working areas form a volume cavity, so that the filter is added Slurry, washing liquid will not overflow and string position. When the filter slurry added by the filter is vacuum-filtered and washed to form a filter cake, the screw discharge device on the filter surface will push the filter cake from the inner ring to the outer edge and fall into the flooding tank, leaving the filter cloth. There is a small amount of cake on the filter cloth that can be regenerated by back blowing. The central distribution valve is divided into upper and lower layers. The upper distribution valve rotates synchronously with the filter plate. The lower distribution valve is fixedly installed on the center column. There is a wear-resistant seal between the upper and lower distribution valves. When they are rotated relative to each other, the seal is kept airtight under the effect of vacuum. According to the process requirements of filtration production, the lower distribution valve is provided with a continuous operation zone such as a filtrate zone, a washing zone, a secondary washing zone, a slag discharge zone, a filter cloth regeneration zone, etc. Each operation zone is corresponding to a vacuum system. A slurry hopper corresponding to the operation area of the center distribution valve is provided on the filter surface of the rotary vacuum filter, and the filter slurry is uniformly distributed on the filter surface. Under the action of vacuum, the liquid and the solid are separated and the liquid is separated. Downstream through the filter cloth to the vacuum filter, the solids form a cake on the filter cloth. The washing liquid is evenly sprinkled on the cake surface with a lotion dispenser for washing. Between the different working areas, the filter surface is suspended above the filter surface, and the liquid does not mix the cantilever arms between each area, which affects the flatness of the filter plate, thereby ensuring the smoothness of the filter during operation. (5) Drive pin wheel: This is a steel circular ring rotation part. The drive pin wheel has drive pin teeth. (6) Supporting roller: A plurality of supporting rollers are arranged in an annular supporting plane which supports a steel rail which drives the lower bottom surface of the pin wheel so that the driving pin wheel rotates horizontally on the supporting horizontal surface of the supporting roller. (7) Screw unloading device: The spiral unloading device consists of an electric motor, a speed reducer, and a multi-head large pitch screw unloader. One end is mounted on the central operating platform of the center column and the other end is mounted on the floor support on the outer edge of the filter. The installation height can be adjusted to maintain a proper distance between the bottom of the spiral and the cloth surface. (8) Filtrate Dispenser: It distributes the slurry evenly on the filter cloth Table Rotary disk Vacuum filter structure diagram (plane) 2 Rotary disc vacuum filter Structure Description (1) Drive device: The drive device is composed of a motor, a speed reducer, and a star wheel. In addition, it is equipped with a frequency converter for the motor to adjust the speed of the motor. (2) Retainer: Installed inside the drive pin, the rotation center of the drive pin wheel is set in the axis of the circle formed by a plurality of stop wheels. (3) The fan-shaped filter hopper: The main unit of filtration, spliced by a number of fan-shaped filter hoppers into a horizontal circular filter surface, the filter surface is covered with a filter cloth. Each fan-shaped filter hopper consists of a vacuum chamber, a discharge pipe, and a filtrate manifold. (4) Floating support beam: The floating support beam is installed on the top surface of the driving pin wheel, which supports the filter bucket to keep horizontal stability and is driven by the driving pin wheel to rotate synchronously. The floating support structure of the support beam ensures that the expansion displacement of the filter bowl is not limited. Overcomes the entire filter surface and also prevents the solids in the slurry from depositing in the slurry hopper. (9) Stopper: The stopper consists of a baffle holder and a rubber baffle, which separates the liquid between two different work areas so that they do not collude with each other. 3 Application of Vacuum Filter in Alumina Industry Jiangsu Xinhongda Company successively is Chongqing Nanchuan Alumina Factory (HDZP * 30, 1), Pingdingshan Huiyuan Chemical Industry Company (HDZP-30, 1), Chongqing Dingtai Tuoyuan Alumina Development Co., Ltd. has 2 sets) and Guizhou Qingzhen Alumina Plant (HDZP 55-1) has provided a rotary vacuum filter, which has a good use effect. The following uses the HDZP-55m2 filter in Guizhou Qingzhen Alumina Factory as an example to describe its performance indicators: (1) Total filter area: 55m2 Effective filtration area: 46m2 (2) Vacuum: Absolute pressure ~ 34kPa (3) Filter rotation speed: 2 ~5min/r (4) Feeding device: 1 set (5) Lottery device: 2 sets (6) Filter Rotary Diameter: (Outer Disk Diameter) Y900 (7) Drive Motor Power: 7.5kW (8) Unloading Screw Motor Power: 11kW (9) Dial Accuracy Requirement: Rotor Diameter Deviation: *2mm inner diameter deviation of turntable: *2mm flatness of turntable: *1. 5mm gap between turntable and material spiral: +5 (easy to adjust) Performance of treated aluminum hydroxide slurry: ~80*C (top temperature of hot water 95 increased The vertical distance between the motor base and the suspended bearing is adjusted by using a method of reducing the thickness of the backing plate to meet the site requirements. b. Replace bearing ring and L-shaped beam with countersunk head bolt to avoid unsafe factors caused by weld cracking. c. For the uneven processing of the gutters, we made the model to correct the gutters and guide the workers to operate carefully to solve the pressing problem of the filter cloth. 6 Benefits The import price of this equipment is 1.5 million yuan more than the price of our factory. When applied to the aluminum hydroxide product filtering and washing process, the process flow is greatly simplified, and all economic indicators far exceed the 40m2 rotary drum filter: 40% reduction in filter cloth loss, 30% reduction in energy consumption, and 30% reduction in energy consumption. Small area can reduce infrastructure investment. Due to its high degree of automation, the labor intensity of the operator is reduced, and labor costs are reduced. The equipment is simple in operation, reasonable in structure, reduces the leakage of materials, is conducive to environmental protection, and has huge social benefits. 7 Conclusion Through careful production and adoption of the above improvement measures, after the alumina plant's trial operation, it proved that the equipment runs smoothly, with high filtration efficiency and low product moisture content, which satisfies production requirements well. Compared with similar imported equipment, its product performance and manufacturing precision have basically reached the international advanced level, indicating that the development of the 51m2 flat pan filter is a success and can completely replace imported products. We will summarize the successful experience of this production, further improve the design and manufacturing process of the 51m2, 40m2, and 30m2 flat pan filter, and gradually promote it throughout the country to provide a more advanced filtration facility for domestic alumina refineries. Convenient and more economical choice.

Cone drum vacuum washer Cone drum vacuum washer Core Tip: Cone-Walk Drum Vacuum Washing Machine Live Yujun, Liu Bingzhen, Xu Dongming, Zhang Qi (Anqiu Wenrui Machinery Manufacturing Co., Ltd., Anqiu, Shandong 262100) Application and effect. The cone valve washing machine uses vacuum as the filter power, adopts tapered distribution valve, compact structure, easy to fit seal, guarantee vacuum Cone-Wallet Drum Vacuum Washing Machine Huo Junjun, Liu Bingzhen, Xu Dongming, Zhang Qi (Anqiu Wenrui Machinery Manufacturing Co., Ltd., Anqiu 262100, Shandong, China) Application and effect. The cone valve washing machine uses vacuum as the filter power, adopts the conical distribution valve, has a compact structure, and is easy to cooperate with the seal to ensure the degree of vacuum and avoid the string gas. The drum body of the cone valve drum vacuum washer is divided into a number of mutually uncommunicable cells by grid bars, and the cells are connected to the cone valve body evenly distributed around the filter tube through the filter tube. With the rotation of the drum, the cells in turn connect the vacuum zone of the distribution valve spool (divided into the filter zone and the washing zone) and the stripping zone. When the cell is turned to the vacuum filtration zone, the vacuum system sucks. A slurry layer acts on the surface of the mesh; when it is transferred to the vacuum washing section, the waste liquid in the original slurry layer is replaced by the washing liquid after being sprayed with the four-stage washing liquid; finally, the liquid is removed from the pulp section and the blowing system is switched on. , destroy the chamber vacuum, hold the slurry layer, peel the slurry into the discharge chute. The entire washing, concentration and black liquor extraction process of the slurry was completed. 1 Equipment Structure A single pulp washing machine is mainly composed of a drum, a tank body, a distribution valve, a washing device, a stripping device, a transmission device and a screw conveyor. The tandem washer also has a ramming device and a stirring device, and the agitating tank is diluted in the middle. The washer has only one dispensing valve and the filtrate is discharged at one end. The discharge filtrate end is the operating side and the other end is the transmission side. 1.1 Distributing valve Dispensing valve is a very important part of the drum vacuum washer. It is mainly composed of valve core, valve seat and end cap. The valve plug has a 10* cone shape, and it cooperates with the valve of the drum body to form a complete dispensing valve structure. The mating surface of the valve core and valve requires a running clearance of 0.5~0.8mrn and no friction with each other. The valve rotates with the drum, and the valve plug and valve seat are fixed. When each rotation of the drum, the cells on the drum body are respectively connected with the partition of the valve core, and the pulp washing machine successively completes the vacuum filtration, the vacuum washing, and the gas stripping and the like. Distributing valve is vacuum vacuum washer device, there are two ways to generate vacuum: First, the washing machine is installed in the position of the standard 12*, by the black liquid in the water leg when the difference in natural Vacuum; Second, forced vacuum, including the installation of a vacuum pump, receiver, high condenser and collector and a full set of equipment. You can also use both methods at the same time. The general vacuum degree 0. 01 ~ 0.025MP /. Distribution valve structure shown in Figure. 1.2 The function of the tumbler is to filter and wash the slurry and form it on the drum surface.) In 1993, he graduated from the Department of Mechanical and Electrical Engineering of the Heilongjiang Mining Institute and the engineer of mine machinery. He is mainly engaged in the design of papermaking machinery. Tel: 0536 Slurry One end of the drum body is supported by a plain bearing and the other end is supported by a rolling bearing. The drum body is a circular cylinder body and mainly consists of left and right drums, a middle cylinder body and a shaft head. The drum surface is divided into several compartments by grid bars. Each cell has a long circular hole corresponding to the valve body. Connected. When the drum rotates, the filtrate in the compartment passes through each section of the spool one after another, allowing the drum to complete the process of filtration, washing and stripping of the slurry. The filter plate is a new type of stainless steel corrugated filter plate. Its role is to support the filter screen. The assembly form is press-embedded. It has superior anti-filtrate infiltration and increases the effective filtration area. 1.3 The tank body is used to receive slurry and welded with steel plates. A single washing machine tank is generally used for pulp rinsing or concentrating. It is used to bleach the chlorination section. The medium is acidic (pH: 1.8-2.2), alkaline, and the tank is divided into two types: lining glass steel (or stainless steel) and carbon steel. . The tank body is composed of three parts: the slurry tank, the drum groove, and the discharge tank. There are two symmetrically arranged slurry inlets below the slurry tank, with a slurry screen on top to buffer the slurry. There are two sewage outlets under the drum tank, and a D/100 port is provided at the tank 30. It is used to control the liquid level. Use, there is a discharge square hole in the middle of the discharge chute, when using the machine outside the pulp, do not open this hole. Multiple tandem washers are mainly used for the washing of pulp after cooking, such as kraft or alkaline pulping, generally made of carbon steel. There are also intermediate slots between each two tandem washers. The slurry was peeled off from the previous pulp washer at a concentration of 80 to 12%. Here, the black liquor from the lower pump was used to dilute it to a concentration of about 10, which was fully mixed and stirred, resulting in good diffusion conditions. Drum vacuum pumping machine is superior to other processes in the extraction of black liquor, and it is one of the reasons for heavy equipment that has a relatively high extraction rate. There is a sandwich at the bottom of the middle tank. There are two diluent inlets at the bottom of the sandwich. The diluent overflows from a row of rectangular holes at the top of the sandwich. The middle of the tank is separated by steel plates, and the slurry can only pass under the partition. The middle tank has a pressure roller, which rotates in the direction of 51r/rnin counter-wash drum flow, breaks the pulp block stripped from the pulper, and then a stirring roll that turns at 88r/min counterflow. The slurry is crushed into a slurry of uniform concentration to promote black liquor dispersion. The slurry then flows through the lower part of the pulp-retaining plate, overflows the weir plate and enters the drum groove, and is then sucked onto the washing drum of the lower-stage washing machine. This avoids Pulp slurries or internet access are difficult. There are also 2 filling slots below the middle slot. The slurry is used as a cleaning port. 1.4 Washing Device The washing device is to make the slurry layer replace washing. Mainly by the wash pipe, nozzles, distribution pipes, valves and other components. A total of four wash pipes are staggered in the washing zone of the drum, with a distance of 15... to ensure uniform washing of the pulp layer. The water pressure and flow of the wash tube can be adjusted by the respective valves. 1.5 Peeling device The machine uses an air scraper to strip the pulp. It is mainly composed of a fan, an air inlet pipe, a scraper body, a blade and a seal, and is installed in the stripping zone of the drum. The blade and drumhead maintain a spacing of about 6rnrn. Its working principle: the low-pressure air blown out by the fan enters the scraper body cavity from the air inlet pipe, and is discharged from the cavity discharge port, and enters a pressure zone composed of a pulp surface, a blade body surface, a drum surface, etc., and part of the air enters the distribution through the drum surface. The stripping zone of the valve causes the drum vacuum to be destroyed and an air cushion is formed on the pulp surface. A part of the valve is forced to eject from the gap between the blade and the drumhead to lift the slurry layer, peeled by the blade, and then discharged into the slurry slot. . Transmission The transmission consists of an electric motor and a suspended gear reducer. The shaft head of the drum directly extends into the reducer gear shaft sleeve, and is connected with a key so that one end of the reducer is suspended on the tumbler shaft and the other end is supported by a vertical column. The hood machine is made of fiberglass. Take slicing and processing. When the installation is connected with a bolt, the outside of the machine has an exhaust port for users to connect the exhaust pipe. Each washer has one machine. 2 The actual application effects were used by Chenming, Sun and Linqing Paper. The results are shown in the table below. Cone-Valve Drum Washer Field Operation Condition Technical Index Shandong Shouguang Chenming Shandong Sun Paper Shandong Linqing Paper Pulp Concentration (%) Pulp Concentration (*) Residual Alkali Capacity (f/L) Production Capacity (t/ d) Black liquor concentration () The cone valve drum vacuum washer can be used in a single unit or multiple units in series. Its structure is reasonable, the performance is superior, the production capacity is large, the black liquor extraction rate is high, the pulp washing quality is uniform, and the fiber loss is small. Application performance has reached the leading domestic level. Applicable to all kinds of slurry washing, the degree of slurry cleaning, extraction of black liquor concentration, reduce paper industry black liquor pollution. With the increasing demand for resources and environmental protection, the country has far-reaching significance in solving the paper mill wastewater pollution, protecting the natural environment and benefiting future generations. Therefore, the social benefits of the project are very significant, and the application prospect is very broad.

Disc vacuum filter First, the vertical vacuum filter The vertical disk vacuum filter, also known as the butterfly vacuum filter (Figs. 1 and 2), has a different filtering surface configuration than the cylindrical filter, but the operating principle is basically the same. The filter surface is composed of a plurality of individual forgotten segments forming a plurality of (generally 10-12) discs. Each of the segments is a separate filter unit, and the filter cloth is made into a bag sleeve on the segment to form a filter chamber. During operation, the filter disc rotates clockwise, and the solid particles in the slurry adhere to the filter disc by vacuum to form a filter cake. The agitator swings back and forth to prevent solid precipitation. After the filter cake leaves the liquid level, the water is continuously removed under vacuum. The filtrate penetrates the filter cloth, enters the filter tray, passes through the filtrate tube, and is discharged from the dispensing head. The filter cake is discharged from the inside and outside through the filter disc in the discharge area. Figure 1 Structure of the vertical disk vacuum filter 1, the filter; 2, the main transmission mechanism; 3, the agitator; 4, the agitator transmission mechanism; 5, the instantaneous blowing system The fan-shaped piece is fixed on the main shaft (hollow shaft) by bolts, and it is convenient to disassemble and replace the filter cloth, and even can be carried out during the operation of the filter machine, which is convenient for production inspection and maintenance. China's prototype 60 m 2 vertical disc vacuum filter consists of 6 discs. In the flocculation reverse flotation process of Baotou Steel, the filter-0.038 mm (-400 mesh) accounts for more than 95% of the flocculated iron concentrate, the filter cake moisture is 14-16%, and the unit production capacity is 0.31-0.43 tons/(m 2 .Time). (When m 2.) Copper sulfide concentrate was filtered, the filter cake of 12-14% moisture, the unit production capacity of 0.2 tons / or more. The performance of the vertical plate vacuum filter produced in China is listed in Table 1. Figure 2 Working principle of the disc vacuum filter 1, filtrate tube; 2, filter cake; 3, agitator; 4, filter cake discharge; 5, liquid surface [next] Table 1 Specifications and technical parameters of the vertical plate vacuum filter Filtration area m 2 Filter disk number Filter disc diameter Mm Filter plate speed r/mm Motor power kW Agitator motor dynamic rate kW Machine weight t 9.0 18 27 39 58 78 97 116 200 40 60 80 100 200 2 4 6 4 6 8 10 12 12 4 6 8 10 12 1800 1800 1800 2700 2700 2700 2700 2700 3800 2800 2800 2800 2800 2800 0.08-1.89 0.073-2.04 0.254-1.14 0.073-2.04 0.135-0.61 0.254-1.4 0.13-0.61 0.15-0.67 0.254-1.44 0.15-1.44 0.285-1.98 0.148-0.66 0.25-1.09 0.2;0.3; 0.4;0.6; 0.2;0.3; 0.4;0.6; 0.2;0.3; 0.4;0.6; 0.2;0.3; 0.4;0.6; 0.2;0.3; 0.4; 0.61 1.1 2.2 1.1 3.0 1.1 1.5 2.2 2.2 4.0 4.0 11 2.2/3.5 1/4/5.5 2.2/3.5/4/5.5 2.2/3.5/4/5.5 2.2/3.5/4/5.5 2.2/3.5/4/5.5 1.1 1.1 1.5 2.2 2.2 4.0 4.0 5.5 3.5/4.0 3.5/4.0 3.5/4.0 3.5/4.0 3.5/4.0 3.42 4.565 3.5 5.06 4.25 5.65 twenty two 8.08 11.09 12 24.3 14.6 Second, horizontal disc vacuum filter This machine is also called flat disk or water platform type vacuum filter, and its structure is shown in Figure 3 and Figure 4. The filtering surface is in the shape of a truncated cone. There are concentric inner and outer rims of a certain height on the disc surface. Below the filter surface, a plurality of radially vertical partitions are divided into a plurality of independent fan-shaped filter chambers, which are connected to the automatic shutters under the disc. The slurry is evenly fed from the top weft-shaped distributor to the fan-shaped filter leaves, and the filter residue is scraped off onto a screw conveyor or a belt conveyor with a scraper. The filtrate is discharged through the outlet below the filter leaf, the filtrate tube and the central dispensing head to the central distribution head of the filtrate tank to the filtrate tank. The filter cake can be washed several times, and the wash solution and filtrate can be collected separately. In order to eliminate the obstruction of the remaining filter cake from the next overfiltration, compressed air is introduced at the feed point and the residual filter cake is blown back into the newly fed slurry. Figure 3 How the horizontal disc filter works 1, the distribution head; 2, screw conveyor; 3, filter disk [next] The horizontal disc over-the-air filter has a large area, and the filter cloth is easy to be blocked and easily broken. It is generally used for filtering a slurry which requires a good washing effect and contains a large density of coarse solids, and can also filter a slurry containing suspended particles of a smaller density solid. Figure 4 Horizontal disc filter profile The filter area of the conventional structure type filter is about 1-14 m 2 and the maximum is only 20 m 2 . However, if the fan-shaped filter chamber is folded from a single plate, a mainframe having a filtration area of 250 m 2 can be produced. The specifications of horizontal disc vacuum filters manufactured by West Germany are listed in Table 2. Table 2 Horizontal Disc Vacuum Filter Specifications Filter size mm Filtration area, m 2 Filter weight, t Power, kW diameter height 1300 3300 4200 1150 1500 1620 1 7 12 1.5 8 20 1.1 2.6 4.4 Third, horizontal rotary turn vacuum filter This machine is also called vertical turntable dump vacuum filter. Its structural principle is shown in Figure 5. Figure 5 Horizontal rotary turn vacuum filter The annular filter surface is formed by a plurality of independent fan-shaped filter discs, and the filtrate outlet of the filter disc is in magnetic communication with the central distribution tube. Each fan-shaped filter disc is mounted on a rotating table. The slurry is fed to the filter disc through a dispenser and filtered under vacuum suction. The filtrate is discharged through a central suction tube and a branch pipe and a central dispensing head. The filter cake is left on the filter cloth, and after three stages of washing, it enters the discharge area, and the filter disc is turned 180°, and the gravity or compressed air is removed under the action of the reverse. Thereafter, the filter disc is reset, after washing and vacuum drying, it is transferred to the feed position to start a new filtration cycle. The machine adapted to filter higher density, higher concentration of coarse particles of the slurry, e.g. phosphate, gypsum, manganese dioxide, potassium, iron ore, iron ore and other special materials. [next] At present, the largest turn-over filter has an area of 205 m 2 and a diameter of 23 m for processing P 2 O 5 of 1,000 t/d. The specifications of domestic horizontal rotary turn vacuum filter are listed in Table 3. The specifications of the tumbling filter manufactured in Japan are listed in Table 4. Table 3 Domestic horizontal rotary tipping vacuum filter specifications Product specifications PD-1.5 PD-20 Effective filtration area, m 2 Number of fights Maximum reverse angle of the bucket Turntable diameter, mm Turntable speed r/min Dimensions (length × width × height), mm Weight, kg 1.1 15 150 2490 0.05-0.7 3120×2970×840 3300 17.8 20 152 8092 0.125-0.375 9900×8960×1426 23000 Table 4 Specifications of Japanese-made tumbling filter Total filtration area m 2 Number of filters Diameter, mm Height, mm weight, t 65 70 75 80 85 90 95 100 32 13400 13400 13800 13800 14800 14800 15200 15200 3200 45.0 46.5 48.0 49.5 51.0 52.6 54.1 55.7 105 110 115 120 125 130 135 140 32 15900 16300 16800 17200 17600 18050 18400 18800 3400 61.0 62.7 64.4 66.2 67.8 69.5 71.2 72.9 145 150 155 160 105 170 175 180 36 18600 19000 19400 19800 20200 20600 20900 21300 3400 78.2 79.9 81.5 83.2 84.9 86.6 88.3 90.0

The difference between fiber polyester fiber bundle and polypropylene fiber bundle filter material: fiber bundle material is polypropylene fiber and polyester fiber. Polyester fiber bundle is made by artificially tying polyester fiber. Polypropylene fiber bundle is made of polypropylene fiber. The material is different, the polypropylene fiber can only be used for tying the fiber bundle, and the fiber bundle filter material is made of polymer fiber bundle as the filter material, and the diameter of the monofilament can be several tens of micrometers to several micrometers, belonging to the micrometer filter material (the sand filter belongs to It has a large specific surface area and greatly improves the retention and adsorption capacity of particles in water. The removal rate of suspended solids in water can be close to 100%. When the water is well coagulated and the suspended matter content is 20 mg/L, the suspended solids can be filtered up to 1 mg/L or less. The advantages of the fiber bundle filter material have obvious removal effects on impurities such as bacteria, viruses, macromolecular organic matters, colloids and iron. The removal rate of suspended solids with a particle size greater than 5 um is 90-95%. The problem that the filtration precision of the granular filter material is limited by the particle size of the filter material is solved. It is a new generation of granular filter equipment such as quartz sand. The mechanical adjustment device can quickly adjust the bulk density of the bundle filter according to the effluent quality and filtration rate requirements. The high-efficiency fiber bundle has light texture, high strength, good elasticity, abrasion resistance, corrosion resistance and no water absorption. There are many advantages in the water treatment process. Fiber bundle filter materials are widely used in high-standard water, recycling, side filtration, and wastewater recycling in power, oil, chemical, metallurgical, and electronics industries. Please indicate the source.

First, the cylinder type vacuum filter Vacuum filter is cylindrical metal ore dressing plant most especially black concentrator applications dewatering equipment. According to its unloading method, it can be divided into various types. Figure 1 is a continuous filtering device that can simultaneously perform operations such as filtration, washing, and cake removal in the same rotating device. The cylinder is a cast or steel plate welded cylinder whose outer surface is divided into a plurality of filter chambers by a grooved lattice plate. The filter cloth is covered on the grid plate. The lower part of the cylinder is immersed in the slurry tank and is rotated around the horizontal axis by the gear system. The size of the filter chamber should not be too wide, generally not exceeding 550 mm. The number is related to the diameter of the cylinder. When the diameter is large, the outer surface area of the cylinder is large, and the number of filter chambers is correspondingly increased. Conversely, the number of filter chambers is correspondingly reduced. For example, a commonly used 40 m 2 filter has 24 filter chambers. The outer filter type vacuum filter uses a scraper to drop the filter cake. The filter cloth is fastened to the filter plate by means of a wire . These wires also serve to prevent the filter cloth from being scratched by the scraper. The outer filter vacuum filter has a stirrer in the slurry tank, which is located below the cylinder and is driven by the bevel gear and the chain. When the agitator is working, the slurry can be kept in suspension in the trough. The number of times of agitation depends on the nature of the material, and is generally 20-60 beats/min. For materials with a large particle size and coarse density, the number of stirrings can be large. The dispensing head is an important part of the filter. The filtrate is discharged through it, and suction and pressure are alternately carried out during the filtration process, so that the slurry forms a filter cake, and is changed from a vacuum suction state to a compressed air blow state, thereby effectively controlling the order of the filtration operation. The dispensing head is divided into two types: planar contact type and cylindrical surface contact type. Cylindrical surface dispensing heads are not easily repaired after wear. It is easy to get stuck by the ore particles and is used less. Most filters use a flat distribution head. In order to facilitate maintenance, the flat distribution head disk and the gas disk are often made to be in direct contact with the wearing parts. Figure 1 Structure of the barrel type external filter vacuum filter 1. Cylindrical body transmission device; 2. Dispensing head; 3. Cylinder body; 4. Bearing seat; 5. Scraper; 6. Slurry trough; 7, stirring transmission device; 8, agitator; 9, winding device The cylindrical external filter vacuum filter can be divided into the following working areas according to the filter cake forming process. as shown in picture 2. Figure 2 Working diagram of the cylindrical external filter vacuum filter 1, the filter chamber; 2, the distribution valve; 3, 4, the tube connected to the vacuum pump; 5, 6, the pipe connected to the air compressor; 7, washing water pipe [next] Filter zone I. The cylinder in this zone is immersed in the slurry, and the filter chamber formed between the filter cloth and the grid plate is evacuated, and the filtrate is sucked into the filter chamber through the filter cloth, and then discharged through the dispensing head. The solid material and residual moisture are adsorbed on the surface of the filter cloth. Sucking area II. In this area, the remaining filtrate is drained and the filter cake is blotted dry. Washing area IV. In this zone, fresh water is sprayed on the filter cake by the tube 7, and after filtering the filter cake, it is sucked into the filter chamber, discharged through the tube 3 together with the filtrate or separately discharged by the tube 4. Blow in the area VI. In this zone, the filter chamber communicates with the compressed air, and the compressed air blows the filter cake to facilitate unloading. Discharge zone VIII. In this zone, the filter cake is peeled off by the scraper. In the figure, III, V, VII, and IX are non-working areas and are located between II, IV, VI, and VIII. Therefore, when the filter chamber is changed from one zone to another, it does not communicate with each other. The beneficiation product usually does not require washing, so when the concentrator uses a vacuum filter, the washing zone is incorporated into the blotting zone. Each cycle of the dipping filter, under the adjustment of the dispensing head with the vacuum tube, the cycle of filtration, dehydration, blow drying and filter cloth cleaning is gradually completed. The specifications and technical performance of the commonly used tubular external filter vacuum filter are listed in Table 1. Table 1 Technical data of cylinder type external filter vacuum filter Model Cylinder size, mm Filtration area m 2 Cylinder speed, r/min Stirring times Times / min Diameter × length Group I Group II GW-20 2500×2650 20 0.14, 0.19, 0.27, 0.38, 0.54 25 or 45 GW-30 3350×3000 30 0.12 0.16 0.23 0.29 0.39 0.56 0.11 0.14 0.21 0.26 0.34 0.5 GW-40 3350×4000 40 GW-50 3350×5000 50 GW-3 1600×700 3 0.13-0.7 GW-5 1750×970 5 0.13-0.7 Model With electric motor, kW Dimensions, mm Weight t Cylinder Blender Length × width × height GW-20 -8/4/2.5/4.0 2.2 4480×4085×2890 10.6 GW-30 3.5/4.0/5.0 3 5200×4910×3743 17.2 GW-40 6200×4910×3743 19.5 GW-50 4 7200×4960×3743 twenty one GW-3 1.1 3.43 GW-5 1.1 5.5 Second, the cylinder type internal filter vacuum filter The inner surface of the cylinder of the cylindrical internal filter vacuum filter is its filtering surface. The slurry is fed to the inside of the cylinder, and the coarse material is deposited on the filter cloth before the particles due to gravity. A coarse particle layer with a large gap is formed, and as the fine particle material is deposited, a "bridging phenomenon" occurs in the pores, so that particles having a diameter smaller than the pores can be stopped, thereby improving the filtration effect. In the cake layer filtration, the main function of separation is the filter cake layer, not the filter medium. Therefore, when the filter type vacuum filter is formed into a filter cake, in addition to relying on the vacuum, the material can be settled by means of material sedimentation, and a high production capacity can be obtained by filtering the material elbow which is easy to settle. This is particularly suitable for the filtration of coarse-grained materials and magnetite which is particularly severe in magnetic agglomeration. In addition, the filter has a large filter cloth cleaning area, and the filter cake can be removed to have a longer cleaning room to restore the permeability of the filter cloth. [next] The structure of the cylindrical internal filter type vacuum filter is shown in Figs. 3 and 4. The working principle is the same as that of the external filter vacuum filter. The inner filter surface of the internal vacuum filter is divided into a plurality of filter chambers, and the filter chamber is pumped and blown through a vacuum tube. The vacuum tube is connected to the dispensing head, and the dispensing head works in the same way as the external filter vacuum filter. The cylinder rotates for one week, and the circulation process of filtering, dehydrating, blowing, unloading, and cleaning the filter Ma Daha can also be completed, as shown in FIG. 5 . Figure 3 barrel type internal filter vacuum filter (center tape unloading) 1, tape; 2, cylinder; 3, distribution head; 4, roller; 5, transmission Figure 4 cylinder type internal filter vacuum filter (slot discharge) 1. Dispensing head; 2. Roller; 3. Unloading device; 4. Cylinder; 5. Transmission device Figure 5 type internal filter vacuum filter working principle diagram I, filtration zone; II, dewatering zone; III, discharge zone; IV, filter cloth cleaning zone 1, cylinder; 2, roller; 3, funnel; 4, belt conveyor; 5, filter cake; 6, pulp There are two types of filter cake discharge methods for the cylindrical internal filter vacuum filter. One is to use a fixed chute with diabase lining to send the falling cake directly to the silo outside the silo. The discharging method is convenient to operate, the device structure is simple, and the multi-small filter is used; the other discharging method is the center belt conveyor discharging. This unloading method works reliably, and it is convenient for collecting belt conveyors and weighing scales when working in multiples. The disadvantage of the cylindrical internal filter vacuum filter is that it is troublesome to replace the filter cloth, the body is large, and the working condition in the observation machine is inconvenient during operation. The specifications, performance and technical parameters of the cylindrical internal filter vacuum filter produced in China are listed in Table 2. Table 2 Performance of cylindrical internal filter vacuum filter model Dimensions, length, width and height; mm Filtration area m 2 Cylinder speed, r/min Cylinder drive power kW Unloading method Belt conveyor drive rate, kW Weight t high speed Medium speed Low speed GN-8 GN-12 3200×3200×3400 3200×3200×3400 8 12 0.72 1.0 1.43 0.49 0.69 0.96 0.31 0.47 0.68 2.2 Center belt conveyor or chute 1.5 7 GN-20 5200×3900×4100 20 0.42 0.56 0.12 0.17 3.5 2.2 13 14 Center belt conveyor GN-30 6300×3900×4100 30 0.84 1.04 0.25 0.31 4.0 GN-40 6800×3900×4100 40 1.40 2.18 0.42 0.66 5.0 3.0 17

Drum vacuum filter, English: rotaryvacuumdisk-fiter. A type of continuous filter. The construction is similar to the drum vacuum filter and the operating principle is the same. A negative pressure is used as a filter to filter the continuous filter on the surface of the cylindrical drum. This filter was originally used in the alkali and mining industries, and later extended to the chemical, coal and sludge dewatering sectors. 1 When the system is in normal operation, the granulated water volume, the amount of purge air, the amount of sweep water, the maximum water temperature of the granulator and the slag flow rate shall reach the design specifications. 2 When the system is running, the equipment inspection should meet the following requirements: the equipment is not abnormal, the granulation head is not blocked, the tank grille is free of slag blocks, the high and low ditch, the slag gate is in a reasonable state, there is no slag in the hot water tank, and there is no slag in the pit. Water and slag, no leaks in each pipeline valve, smooth tape transportation, no deviation, normal water level. 3 The slag ditch used in the tapping shall have the conditions for diverting the dry slag or other measures for treating the slag. The time for diverting the shunt shall not exceed 3 min. 4 During normal production, the operation of the system equipment should be automatically controlled. 5 The system should be started 20 minutes before the tapping, and the signal is [ready", and the operating room can start the system. A startup fails and should not be started immediately. 6 When the system is in danger of personal injury and equipment safety, stop the system operation immediately and pour the hot residue into the dry slag pit or slag tank. 7 When the iron is discharged, there should be no people near the slag ditch and the granulator. 8 should pay close attention to the amount of granulated water in the system. If it is found that the amount of granulated water is greatly reduced, the drum is faulty, the tape is heavily watered, or the operating room signal has a [big alarm", it should be immediately diverted to the dry slag pit or slag tank to prevent the liquid slag from entering the granulation system. After the iron (slag) port is blocked for 20 minutes, the system can stop running. After 10 system shutdown, the pump power supply should be stopped first, then the granulation head, water slag ditch, receiving tank and granulating water pump should be inspected and cleaned. To check or replace or clean the nozzle, stop the hydraulic system (close the hydraulic valve). Check the belt, first stop the belt conveyor power supply. 11 System maintenance personnel should not short-circuit various protection devices of the system. If equipment abnormalities or accidents are found, they should be quickly judged and handled to prevent accidents from expanding; and abnormal phenomena and accidents should be recorded, and relevant leaders should be reported. 12 Various interlocking and protection devices of the system shall not be adjusted freely without the consent of the competent department; if adjustment is required, it shall be approved by the competent department and reported to the professional director for approval; the adjustment shall be recorded and archived. . 13 When any control handle of the system is in the [auto" position, it should not be overhauled. If you need to rotate the drum during system maintenance, you should assign a special person to operate. 14 When using the wheel method, the safety net should be set near the granulating wheel.