The filter chamber of the plate-and-frame filter press consists of a flat filter plate and a hollow filter frame. The filter cloth is fixed on the plate frame. This is the early main filter press form, while the filter chamber of the box-type filter press is composed of two adjacent recessed filter plates. The main advantage is that the replacement of the filter cloth is convenient, but the disadvantage is that the efficiency is low, the filtering effect is not good, and the filter plate is easy to break.

plate and frame filter press is first applied to chemical dehydration machinery. Although the plate and frame filter press is generally intermittent operation, large investment in infrastructure equipment and low filtration capacity, it is still widely used in some small sewage plants because of its advantages such as large filtration driving force, high solid content of filter cake, high filtrate clarity, high solid recovery rate and low consumption of conditioning drugs.