How to determine whether the sludge is pressed dry during the operation of the plate and frame filter press?

Whether the sludge in the plate and frame filter press is pressed dry can be comprehensively judged from these three aspects:

First, the feed pressure rises to the set pressure;

Second, the liquid discharge from the liquid outlet hole of the filter plate of the plate and frame filter press is significantly reduced;

Third, the material in the storage tank is significantly reduced.

Theoretically, it is impossible for the plate and frame filter press to completely dry the sludge. It can only be understood as the end of the feeding process. If you want to further reduce the moisture content of the filter cake. The following two methods can be adopted:

1. Increase the feed pressure of the filter press (provided the hydraulic cylinder pressure is sufficient);

2. Pass compressed air to blow away the moisture. Because the plate and frame can only be dehydrated and cannot be pressed dry, you can pay attention to the water outlet. When the pressure reaches the upper limit, the water drips very slowly, and the sludge is almost dried. However, it depends on the nature of the sludge itself.