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DU Series Rubber Belt Vacuum Filter

basic information

Product Description

Working principle

　　The rubber belt vacuum filter uses the filter cloth as the filter medium and the integral annular rubber belt as the vacuum chamber. The annular rubber belt is driven by the transmission device and operates continuously. The filter cloth is laid on the belt and runs synchronously with it. The belt contacts with the vacuum slide table (the annular friction belt is installed between the vacuum chamber and the rubber belt and is filled with water to form a water seal). The slurry is evenly distributed on the filter cloth by the distributor. When the vacuum chamber is connected to the vacuum system, a vacuum suction zone is formed on the rubber belt. The filtrate is collected through the transverse grooves on the rubber belt and enters the vacuum chamber through small holes. Solid particles are intercepted on the filter cloth to form a filter cake. The liquid entering the vacuum chamber is discharged by the air-water separator. As the rubber belt moves, the formed filter cake is gradually dehydrated under the influence of pressure difference. Finally, the filter cloth is separated from the tape and the filter cake is discharged at the discharging roller. The filter cloth which removes the cake is regenerated after cleaning, and then re-enters the filter area after a set of backup rolls and deviation correction devices, and begins to enter a new filtering cycle. Rubber belt vacuum filter realizes real continuous operation and filtration. Material can be continuously cleaned from feeding, dehydration, slag discharge to filter cloth.

Features of type DU equipment

(1) The whole machine adopts modular design to facilitate transportation, disassembly, installation, maintenance and maintenance;

(2) Rubber belt is formed by one-time vulcanization, which eliminates the damage of rubber belt caused by manual grooving, has high tensile strength and excellent performance, and its idler is supported by a mandrel labyrinth idler, which reduces the running resistance and helps to prolong the service life of rubber belt.

(4) The filter cloth is rectified by double balloons imported from Nobel Crown in Britain. The form of rectification is serpentine. The balloon expansion can be adjusted automatically according to the displacement of the filter cloth to avoid over-deviation and ensure the service life of the filter cloth.

(5) The tension of filter cloth adopts gravity tension mechanism, equipped with adjustable gravity rollers, which can be adjusted automatically according to the tension of filter cloth to ensure the service life of filter cloth.

(6) The equipment is equipped with a wrinkle-proof spreading spiral roller to effectively prevent the wrinkle of the filter cloth, to ensure that the filter cloth is in the best working condition and to ensure the service life of the filter cloth.

(7) The running speed of the equipment can be adjusted between 1 and 12 m/min, and the optimum running speed can be selected according to different material parameters.

(8) The vacuum box and sliding table with integral structure are adopted to ensure the strength, straightness and flatness of the vacuum chamber, and the vacuum loss is less than 1%. It also eliminates the serious wear and tear of rubber belt and friction belt caused by single sliding platform, and ensures the service life of rubber belt and friction belt.

(9) The equipment is equipped with an isolator and a covering layer, which can protect the leakage of vacuum and save energy consumption.

(10) equipment filter cloth cleaning adopts the multi angle rotary sprinkler imported from the US spray. When the filter cloth is regenerated, both sides can be effectively cleaned, so as to remove the clogging of filter cloth and install the high speed cleaning roller, which can effectively save water volume, and ensure better filter cloth cleaning effect, and ensure the service life of filter cloth.

(11) The equipment can realize remote and on-site double control, and the operation is simple and convenient. After simple training, the operators can grasp the operation points of the equipment, which greatly reduces the labor intensity. Monitor the start-stop operation and important parameters of the equipment, and give an alarm when a fault occurs.

(12) The washing of filter cake (downstream or countercurrent washing) is continuous, highly automated, and the filter cloth has no relative friction and long service life.

DU usage characteristics

1. Wide range of materials

Because of its unique structure, the suitable materials are very wide, especially for slurries with large solid particles and fast settling speed, which can be easily filtered, washed and dewatered.

2. High filtration efficiency, automatic washing and regeneration of filter cloth

(1) Because the filter cloth keeps rotating, every turn can complete the cycle of filtering, washing, dehydration and regeneration of the filter cloth. Therefore, the filter cloth is always running in a state of non-blocking, so the machine can run continuously for a long time without reducing the filtering capacity.

(2) The cake layer thickness is uniform and uniform, and can be adjusted conveniently, so that the solid-liquid separation process is always in the best operating state.

(3) Thin-layer rapid filtration can be achieved for materials with poor filtration performance and high viscosity.

3. Easy regulation and adaptability

(1) By adjusting the speed of the filter belt and the thickness of the filter cake, the solid-liquid separation process can be optimized.

(2) The length of filter section, washing section and dehydration section can be adjusted conveniently to make the solid-liquid separation process more in line with the requirements of production process and enhance the ability to adapt to materials.

4. Multiple downstream or countercurrent washing can be realized, and the amount of washing water is small.

(1) One or more washing sections can be set up according to material characteristics and process requirements.

(2) The downstream or countercurrent washing method can be used to save the washing water and improve the separation effect to the greatest extent.

(3) According to the technological requirements, cold water or hot water can be used for washing water to ensure the best washing effect.

5. Vacuum drainage can realize high or zero drainage

(1) Vacuum drainage can adopt many methods, such as high drainage (liquid seal type) and zero drainage (automatic drainage type), according to material characteristics and process requirements, to meet the requirements of various working conditions.

(2) When the installation height of the equipment is more than 7.5m from the ground, the high level drainage (liquid seal) can be used. This method must meet the installation height requirements, so that it can produce pressure difference, so that the liquid seal drainage can be carried out without any control points.

(3) When the installation height of the equipment can not meet the requirements of liquid-sealed drainage, zero-position drainage (automatic drainage) is adopted, which is not limited by any installation position, and the drainage is realized by switching between vacuum/air switching valves.

6. Fully automatic and continuous operation can be realized.

(1) The material enters continuously from the front end and the filter cake discharges continuously from the back end.

(2) The filtrate is continuously discharged from the automatic discharging tank and enters the next process.

(3) Washing water can be combined with filtrate or discharged separately and recycled.

(4) No special operation is needed, which greatly reduces labor intensity and greatly improves productivity.

(5) Continuous vacuum operation, no vacuum release, high efficiency and low energy consumption;

7. The equipment has few vulnerable parts and low operation and maintenance costs.

DU Type Selection Guide

1. Selecting equipment type according to solid-liquid ratio, treatment capacity, solid particle size, viscosity and solid pile specific gravity;

2. Select the material of the overflow component according to the PH value of the material, and choose the filter medium according to the particle size of the solid and the temperature of the material.

3. Materials containing volatile gases or vapors can be selected as semi-sealed or fully sealed models.

4. Material that is often washed should choose a vacuum chamber with a length greater than 10m. Material that is specially washed should choose a leaching and filtering machine.

5. The same materials that have not been used in the same industry should be tested on a small scale before equipment selection.

6. Priority should be given to the type of effective filter width according to the national standard.

7. It is suitable for filtering materials with large acidity and strong alkalinity.

8. The processing capacity of the same filter area is usually 1.2-1.5 times that of the PBF horizontal belt vacuum filter.

Process flow chart

A. Feeding Device B, Washing Device C, Filter Cloth D, Friction Belt

E, cleaning device F, rubber belt G, deviation correction device H, filtrate device

I. Switching Valve J, Drainage Separator K, Washing Pump L, Vacuum Pump

Outline size drawing

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DU Series Rubber Belt Vacuum Filter

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DU Series Rubber Belt Vacuum Filter

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DU Series Rubber Belt Vacuum Filter