Analysis On The Maintenance Of Press Filter

- Apr 25, 2017-

1.Debugging the normal pressure filter machine can feed the work, each class to work before the whole machine for a thorough examination. The mechanical pressing drive parts and the reducer must be lubricated with sufficient lubricating oil; hydraulic pressure to review the oil storage capacity of the tank and the pressure of the hydraulic station work, hydraulic oil is generally replaced annually, the replacement of the hydraulic system should be done-a comprehensive cleaning, hydraulic station work pressure less than the maximum pressure of the cylinder, but the smallest can not be lower than the filter pressure allowable value, too small will cause larger leakage, the assembly damaged parts.

2. Prohibition in the filter plate less than the prescribed number of plant start-up work, lest damage parts. Before feeding check the arrangement of the filter plate, filter cloth can not have folding phenomenon, to prevent the occurrence of large leakage;

3. To all normal rear pressure filter plate pressure filtration, filtration pressures and filtration temperature must be within the prescribed range, filtration pressure too high can cause leakage, filter temperature is too high plastic filter plate prone to deformation, feeding when suspended liquid concentration evenly. no miscellaneous material; After unloading the cake filter cloth and filter plate must be washed clean, do not allow residue paste in the sealing surface or feed passage, otherwise will affect the feed flow and the sealing of the filter plate, resulting in the filter plate on both sides of the pressure imbalance, resulting in damage to the filter plate deformation.

4. Filter Cloth selection must conform to the filtration technology requirements of the paddle, the new filter cloth should be shrunk before the production, open hole diameter should be less than the aperture of the filter plate, matching the Boucon with the plate hole should be relative concentric, feed hole cloth should be snapped to the tube wall, otherwise, the filter is unclear, the filter rate is low, the cloth tube rupture, not to achieve the desired results of the filter.

5. Filter press in the initial filter, filtering more turbid, when the filter cloth formed a layer of cake filter will become clear. If the filtrate has been cloudy or has a clear mixing, it may be the filter cloth damaged or Boucon with the plate hole deviation, at this time to close the valve or stop feeding replacement filter cloth. A small amount of leakage caused by filter cloth capillarity is permitted between the filter plates.

6. When moving the filter board, force should be evenly and appropriately, not collision, beat, lest damage seal surface and filter wrench. Filter cloth will be hardened after a period of time, performance degradation, for this need to check periodically, if there are changes to affect the filtration rate of the phenomenon, then the corresponding low concentrations of weak acids weak base in and clean, so that the filter cloth recovery function, can not be recovered in a timely replacement.

7. Slurry, washing liquid or compressed air valves, must be operated by the program, cannot be enabled simultaneously, diaphragm squeeze compressed air pressure cannot exceed the filter pressure.

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