In the sludge treatment process, it is possible to encounter the problem of high water content of mud cake, mud running (that is, the sludge is lost during the filtration process) and mud cake showing a "runny" (that is, the internal moisture of mud cake is too high and not dry enough). These problems are usually related to the nature of the sludge, the treatment process, the condition of the equipment and the operating parameters. Here is a detailed analysis of these issues:

Reasons for high moisture content of mud cake

Sludge properties: sludge contains a certain amount of impurities, such as soil, slag, etc., these impurities will increase the moisture content of sludge. At the same time, the metal ions, sulfides, oxides in the sludge will also affect the dewatering performance of the sludge.

Treatment process: In the sludge dewatering process, if the press pressure is insufficient, the flocculation effect is not good, or the sludge conditioner is used improperly, it may lead to the mud cake moisture content is too high.

Equipment status: The performance and maintenance status of the dewatering equipment will also affect the moisture content of the mud cake. For example, if the filter plate of the plate and frame filter press is rusted or blocked, it will reduce the dehydration effect.

Operating parameters: The setting of parameters such as filter time and pressure will also affect the moisture content of mud cake. If the filtration time is too short or the pressure is insufficient, the moisture content of the mud cake will be high.

Two, the reason for running mud

Equipment tightness: If the sealing performance of the filter press is not good, the sludge may flow out of the gap during the filtration process, resulting in mud running.

Sludge concentration: When the sludge concentration is too low, the fluidity of the sludge is enhanced and it is easy to be lost in the filtration process.

Improper operation: In the filtration process, if the operation is improper, such as insufficient compression force or too long filtration time, it may also lead to mud running.

Reasons for the "runny" appearance of mud cake

Insufficient dehydration: If the press pressure is insufficient in the sludge dehydration process, the press filtration time is not enough or the flocculation effect is not good, it will lead to the internal water of the mud cake is too high, showing a "runny" state.

Improper selection of filter cloth: the aperture, material and weaving method of filter cloth will affect the dewatering effect of sludge. If the filter cloth is not selected properly, it may cause the mud cake to be not tight enough and the moisture content is too high.

Four, solution

Optimize the sludge treatment process: increase the pressing pressure, select the appropriate flocculant and sludge conditioner, optimize the dosage, ensure that the mixing intensity is moderate, in order to improve the dewatering performance of the sludge.

Strengthen equipment maintenance: regularly check and maintain the dewatering equipment, such as cleaning the filter, checking the sealing performance, etc., to ensure that the equipment is in good condition.

Select the appropriate filter cloth: according to the size of the sludge particles, select the appropriate pore size, material and braided filter cloth to improve the compactness and dehydration effect of the mud cake.

Adjust operating parameters: According to the nature of the sludge and treatment needs, adjust the filtration time, pressure and other parameters to ensure that the sludge is fully dehydrated.

Enhanced pretreatment: sufficient pretreatment of the sludge, such as dehydration, drying, curing and other steps to improve the dewatering performance of the sludge.

In summary, to solve the problem of high moisture content of mud cake, running mud and mud cake showing "runny", it is necessary to carry out comprehensive treatment from many aspects. By optimizing the sludge treatment process, strengthening equipment maintenance, selecting suitable filter cloth, adjusting operation parameters and strengthening pretreatment, the moisture content of mud cake can be effectively reduced and the dewatering efficiency of sludge can be improved.