Plate and frame filter press is widely used in the field of sludge dewatering, then what sludge dewatering agent or sludge filter aid should be used? In many cases, the use of improper agents will lead to adhesive tape paste filter cloth or side leakage problems. Printing and dyeing sludge, after physical and chemical treatment, influent COD is 800, after treatment is 200-300, it is difficult to debug. In the treatment of various types of sewage, the sewage will contain solid substances.

1. Drug selection problem. The optimum formulation can be determined according to different sludge combinations. Drug selection needs to be tested. It is recommended to use sludge conditioner for sludge dewatering. The specific test results shall prevail.

2. the amount of agent dosage is determined, and the sludge conditioning is closely related to the amount of agent dosage. A small gradient test is required to determine the dosage.

3. and filter cloth selection or filter cloth permeability. If it is a new filter cloth filtering effect is no problem, if the filter cloth is polluted, it needs to be cleaned in time, otherwise it will also affect the dehydration effect.

In addition, in use, attention should be paid to the nature of the sludge, the variety of agents, the dosage and environmental conditions. When dosing, the correct dosing order is also important.

After the sludge conditioning agent is used, the pressure of about 1.0MP is injected into the filter chamber of the filter press to efficiently filter out the free water in the sludge, and the sludge accumulates in the filter chamber to reach the design capacity of the filter press and enters the high-pressure press link. The final dryness of the press dehydrated sludge is closely related to the effect of chemical conditioning and modification, but also to the filling degree of the filter press chamber, the press pressure rate, the press pressure retention time, etc.

The use of high pressure feeding and pressing can shorten the time of the whole press section and improve the production efficiency when the chemical conditioning achieves better results. The automatic discharge and reverse blowing of the filter medium (filter cloth) are completed at the same time, which can not only reduce the labor intensity of the control workers but also improve the efficiency of the completion of the operation, and maintain the effect of the filter cloth intercepting sludge and permeation.