The "runny" problem of the mud cake after the plate and frame filter press is mainly caused by the uneven density of the cake. Here is a detailed analysis of the problem and possible solutions:

Cause analysis

Uneven distribution of pressure during cake formation:

In the working process of the plate and frame filter press, solid particles continue to accumulate in the filter chamber and gradually form a filter cake. Because the density of the cake is not uniform, the density of the central part is often low, and the density of the edge part is high.

When the cake is pressed, the solid particles in the center are subjected to less pressure, while the solid particles in the edge are subjected to more pressure. This causes the solid particles in the center to be squeezed out during the compaction process, forming a "runny" like mud.

Improper selection and use of filter cloth:

If the aperture of the filter cloth is too large or the material is not suitable, it will lead to the uneven distribution of solid particles on the filter cloth, further aggravating the uneven density of the filter cake.

The filter cloth is blocked or worn during use, which will also affect the formation and compaction effect of the filter cake.

Improper operation parameter setting:

Whether the setting of feed concentration, feed speed, feed temperature and other process parameters is reasonable will also affect the formation of filter cake.

Solution

Optimize the selection and use of filter cloth:

Select the appropriate filter cloth to ensure that its aperture and material match the material to be treated.

Check and replace the filter cloth regularly to avoid clogging or wear.

Adjust the compression force:

In the pressing process, adjust the pressing force appropriately to ensure the uniform density of the filter cake. It can be achieved by increasing or reducing the number of compression plates and adjusting the pressure of the hydraulic system.

Optimize operating parameters:

According to the characteristics of the material and processing requirements, reasonably set the feed concentration, feed speed, feed temperature and other process parameters.

Strengthen equipment maintenance and maintenance:

Regular maintenance and maintenance of the plate and frame filter press to ensure the normal operation and stable production of the equipment.

Check whether the components of the device are correctly installed and damaged, and repair or replace the damaged parts in time.

In summary, the "runny" problem of the mud cake after the plate and frame filter press is mainly caused by the uneven density of the cake. This phenomenon can be effectively improved by optimizing the selection and use of filter cloth, adjusting the pressing force, optimizing the operating parameters, and strengthening the maintenance and maintenance of equipment.