As the cake forms the pressure within the filter press the pressure rises as the filtrate has to pass through the already partially formed cake to exit the chamber. It becomes increasingly more difficult to continue pumping as the press is unable to accept more solids. At this point the feed pump is stroking infrequently and the filtrate flow from the filter press has considerably reduced or completely stopped.
At this point or at a pre determined filtration time or pressure being achieved the cycle is terminated and the fully formed filter cake is discharged. |