In view of the high moisture content of mud pressed by plate and frame filter press and the problems of mud stained filter cloth, the following are some solutions, combined with the relevant information in the reference article, the points are expressed and summarized:

1. The use of sludge conditioner

Function: The sludge conditioner can effectively improve the dewatering performance of the sludge, reduce the moisture content, and reduce the situation of mud filter cloth.

 

Specific practices: Before filtration, the appropriate type of sludge conditioner is added to the sludge, fully mixed and stirred, so that the hydrophilic groups on the surface of the sludge can be effectively shed, the surface structure of the sludge can be changed, the sludge desliming efficiency can be improved and the water content can be reduced.

2. Selection and replacement of filter cloth

Selection: The selection of high-quality filter cloth, such as tight structure, fine fiber filter cloth, these filter cloth is not easy to be damaged by mud, suitable for plate and frame filter press and other filtration equipment.

 

Replacement: For blocked or damaged filter cloth, it should be replaced in time to avoid affecting the filtering effect and increasing the difficulty of cleaning.

3. Clean the filter cloth regularly Cleaning method: Use high pressure water spray or add cleaning agent, massage the filter cloth properly during the cleaning process to help remove particles attached to the filter cloth.

Frequency: Clean the filter cloth regularly to maintain the cleanliness and filtration performance of the filter cloth.

4. Check and adjust the filter press operation

Operation problem: Check whether the installation position of the filter press equipment is stable to ensure uniform pressure; Improve the technical level of operation to avoid excessive filtration load or inappropriate temperature; Clean the filter plate thoroughly to avoid residue clogging the filter holes.

 

Equipment problems: check whether the supporting equipment is properly selected and whether there is a fault; Check whether the woven material or O-ring in the filter cartridge is well sealed to prevent leakage; Check whether the surface of the filter press plate is smooth and whether it is seriously aging.

5. Dilute or add filter aid

For the sludge whose material is too thick, it can be diluted or added to the filter aid to improve the fluidity of the sludge and reduce the mud contamination of the filter cloth.

 

6. Check the desilter status

If the desilter in the plate and frame filter press fails, the desilter should be replaced in time to reduce the possibility of hard particles entering the filter cloth.

 

7. Maintain and check the plate and frame filter press

Often check whether the seal ring and drain pipe of the plate and frame filter press are normal, ensure that the reverse blowing is normal, and prevent the sludge dewatering efficiency from becoming worse and the mud cake moisture content from rising.

 

In summary, through the comprehensive use of sludge conditioner, select the appropriate filter cloth, regularly clean the filter cloth, check and adjust the operation of the filter press, dilute or add filter aid, check the state of the desilter, and maintain and check the plate and frame filter press, the problem of high mud moisture content of the plate and frame filter press can be effectively solved.