Waste Water Treatment Industrial Filter Press Plate And Frame Filter Press Equipment Manual

The plate and the frame are arranged alternately. The two sides of the filter plate are covered with filter cloth, and the plate and the frame are pressed by the pressing device, that is, the filter press chamber is formed between the plate and the frame. There is a small hole in the middle of the upper end of the plate and the frame. After pressing, it becomes a channel. The sludge pressurized to 0.2~0.4MPa enters the filter press chamber through the channel. The surface of the filter plate is engraved with grooves. There are holes for the filtrate to be discharged. Under the pressure, the filtrate is discharged through the filter cloth, along the grooves and holes, and the sludge is dehydrated. Plate and frame filter presses have been developed at home and abroad. The plate and frame filter press can withstand higher sludge specific resistance than the vacuum filter, so that the consumption of conditioner can be reduced, and cheaper chemicals (such as FeSO4 7H2O) can be used. When the specific resistance of sludge is 5×1011~8×1012m/kg, it can be filtered directly without preconditioning. The mud cakes yield and mud cake moisture content of the plate and frame filter press shall be determined according to test data or similar operating experience. The moisture content of mud cake can generally be 75%~80%.

1. It called into the slurry dewatering, namely a certain number of filter plate under the action of strong mechanical force is closely lined up, filter plate and filter chamber formed between the filter plate, filter materials are fed into the filter chamber under strong positive pressure, into the filter chamber filter material the solid part is filter medium (such as filter cloth) intercept filter cake formation, the liquid part through the filter medium and the filter chamber eduction, As the positive pressure increases, the solid-liquid separation becomes more complete. However, considering energy and cost, too high positive pressure is not cost-effective.
2. It equipped with a rubber extrusion film filter press, the compression medium (such as air, water) into the back of the extrusion film to push the extrusion film to further dehydrate the extrusion filter cake, called extrusion dehydration.
3. Compressed air into the filter chamber filter cake side through the filter cake, carrying liquid water from the other side of the filter cake filter cloth discharged from the filter chamber and dehydration, called wind dehydration. If the two sides of the filter chamber are covered with press cloth, the liquid part can be uniformly discharged through the press cloth on both sides of the filter chamber, which is a double-sided dehydration of the filter chamber.
4. After the dewatering completed, the mechanical pressure of the filter plate is removed. The filter plate is gradually pulled apart in a single piece, and the filter chamber is respectively opened for cake unloading to complete a main work cycle.

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