Working principle of diaphragm filter press

Diaphragm filter press is a filter press with an elastic membrane installed between the filter plate and the filter cloth. During use, when the feeding is completed, high-pressure fluid or gas medium can be injected into the diaphragm plate. At this time, the entire diaphragm will bulge and compress the filter cake, thereby achieving further dehydration of the filter cake, which is commonly known as press filtration.
 
Working principle:
 
Positive pressure dewatering, also known as slurry dewatering, refers to a process in which a certain number of filter plates are tightly arranged in a row under strong mechanical force, forming a filter chamber between the filter plates. The filter material is sent into the filter chamber under strong positive pressure, and the solid part of the filter material entering the filter chamber is intercepted by the filter medium (such as filter cloth) to form a filter cake. The liquid part passes through the filter medium and is discharged from the filter chamber, thereby achieving solid-liquid separation. With the increase of positive pressure, solid-liquid separation occurs. However, from the perspective of energy and cost, excessively high positive pressure is not cost-effective.

Daily Maintenance and Upkeep Guide for Automatic Diaphragm Filter Press