Plate and frame filter press mud is not formed for a variety of reasons, the following is a detailed analysis of these reasons:

First, sludge properties

Improper sludge conditioning:

Before the sludge enters the plate and frame filter press, the appropriate sludge conditioner is not added, or the type of sludge conditioner is not correct, and the formed floc is a false floc, which is weak in rigidity and easy to deform under pressure.

There were more hydrophilic genes on the sludge surface, and the unmodified sludge surface could not effectively release excess water.

Low solid content of sludge:

The sludge solid content is low before pressing filtration, resulting in unsatisfactory flocculation and precipitation effect.

The viscosity of the sludge itself is large, or the excessive filling of the agent will make the sludge difficult to filter.

Sludge impurity content:

The sludge contains a certain proportion of impurities, such as soil, slag or other impurities, which will increase the moisture content of the sludge and affect the filtration effect.

Two, equipment problems

Filter cloth problem:

The filter cloth is damaged or blocked, resulting in excessive moisture in the pressed mud cake.

Filter plate problem:

Filter plate damage or seal is not strict, resulting in filtrate leakage, affecting the filter effect.

Insufficient pressure:

Insufficient compression force or unstable pressure, resulting in a long working time of the plate and frame filter press, reducing the filtration effect and dehydration effect during filtration.

Three, operational problems

Insufficient supply or too thin:

Insufficient feed or too thin feed, resulting in the filter press can not form enough pressure, thus affecting the formation of mud cake.

Improper operation:

The filter press is not used according to the operating procedures, such as unloading the plate in advance, insufficient pressure, etc., will lead to the mud cake is not formed.

Improper debugging of equipment:

If the plate and frame filter press equipment that has just been put into production is not adjusted well, it is easy to lead to high moisture content of the sludge cake and not forming when it is pressed.

4. Other factors

Insufficient sewage pretreatment:

The sewage is not treated or the pretreatment effect is not good, resulting in unstable sludge properties and difficult to form an ideal mud cake.

Process problem:

Unreasonable process design or improper operation will also affect the filtering effect of plate and frame filter press.

In summary, the reasons for the non-forming mud press of plate and frame filter press involve sludge properties, equipment problems, operational problems and other factors. In order to solve this problem, it is necessary to start from many aspects, such as strengthening sludge conditioning, optimizing equipment configuration, standardizing operation process and strengthening sewage pretreatment. At the same time, it is also necessary to regularly maintain and maintain the equipment to ensure that the equipment is in good working condition.