Diaphragm pressure filter, also known as diaphragm press filter, is a pressure filter with an elastic membrane added between the filter plates and filter cloth. During operation, upon completion of the feed, a high-pressure fluid or gas medium can be injected into the diaphragm plate, causing the entire diaphragm to bulge and compress the filter cake, thereby achieving further dewatering of the filter cake, which is commonly referred to as squeezing filtration.
Diaphragm press filters are used in sludge and wastewater treatment, achieving a filter cake moisture content below 60%. Compared to traditional box press filters, the solid content in the filter cake can be increased by over twice, significantly reducing the transportation costs of the filter cake. The filter cake can be directly burned at power plants, effectively transforming sludge into a resource and wastewater into clean water, completely replacing the box press filter.
