The high moisture content of the mud cake pressed by the plate and frame filter press is a common problem, which may be caused by a variety of factors. In order to solve this problem, you can consider and adjust from the following aspects:

I. Sludge pretreatment

Dehydration and drying: the sludge needs to be fully dehydrated and dried before entering the filter press. This can be achieved by adding sludge dehydrating agents and improving the fluidity of the sludge to reduce the free water content in the sludge.

Removal of impurities: When the sludge contains a certain proportion of impurities, such as soil, slag or other substances, it will increase the resistance in the filtration process, thus affecting the dehydration effect. Therefore, in the sludge pretreatment stage, these impurities should be removed as much as possible.

2. Equipment Adjustment and maintenance

Choose the right filter cloth: the quality and type of filter cloth have a great impact on the dehydration effect. The appropriate filter cloth should be selected according to the nature of the sludge, and the worn or blocked filter cloth should be replaced regularly.

Inspection and cleaning: Regularly check and clean the filter plate, filter cloth and frame of the plate and frame filter press to ensure that its surface is clean and non-clogged. This helps to improve the efficiency of dehydration and reduce the moisture content of the mud cake.

Adjust the compression force: insufficient compression force will cause the gap between the filter plate and the filter frame to be too large, thus affecting the dehydration effect. The pressing force should be adjusted according to the actual situation to ensure that the filter plate and the filter frame are tightly fitted.

3. Operation optimization

Reasonable control of filtration time: too long filtration time will lead to too high moisture content of mud cake. The filtration time should be controlled reasonably according to the nature of the sludge and the performance of the filter press.

Adding sludge conditioner: sludge conditioner can change the physical and chemical properties of sludge and improve its dewatering performance. According to the nature of sludge and dehydration requirements, the appropriate sludge conditioner should be selected and the optimal amount of addition should be determined.

Control feed speed: Too fast feed speed will lead to uneven distribution of sludge in the filter chamber, affecting the dehydration effect. The feed rate should be reasonably controlled to ensure that the sludge is evenly distributed in the filter chamber.

4. Equipment debugging and upgrading

Field commissioning: For newly installed plate and frame filter press or repaired equipment, field commissioning should be carried out to determine the best operating parameters and addition amount.

Equipment upgrade: For the old or poor performance of the plate and frame filter press, you can consider upgrading or transforming the equipment to improve its dehydration efficiency and performance.

In summary, to solve the problem of high moisture content of the mud cake pressed by the plate and frame filter press, it is necessary to start from many aspects such as sludge pretreatment, equipment adjustment and maintenance, operation optimization, and equipment debugging and upgrading. By comprehensively considering these factors and taking corresponding measures, the dewatering efficiency and performance of plate and frame filter press can be significantly improved.