The filter chamber of the plate and frame filter press is composed of a flat filter plate and a hollow filter frame. The filter cloth is fixed on the plate and frame, which is the main form of the early filter press. The filter chamber of the van filter press is composed of two adjacent concave filter plates. The main advantages are that it is convenient to replace the filter cloth. The disadvantages are low efficiency, poor filtering effect and easy to damage the filter plate; The working principle of the van type filter press is that the filter plates are arranged to form a filter chamber (the two sides of the filter plates are recessed, and each two filter plates are combined to form a van type filter chamber).
The surface of the filter plate is provided with pits and bosses to support the filter cloth. The center and corners of the filter plate are provided with through holes, which form a complete channel after assembly, and can lead in suspension, washing water and filtrate. Both sides of the filter plate are supported on the beam with handles, and the filter plate is pressed by the pressing device. The filter cloth between the filter plates serves as a seal.
The main advantages of this model are less loss during feeding, fast filtration, good sealing performance, uniform washing of filter cake, low moisture content, and uniform pressure in each filter chamber, which is not easy to damage the plate. It is basically applicable to all solid-liquid separation industries.