The working principle of the box filter press is composed of filter plates arranged to form a filter chamber (with concave sides on both sides of the filter plates, two plates combined to form a box-shaped filter chamber).
The filter plate surface features dimples and ridges for supporting the filter cloth. The center and corners of the filter plate have through-holes, which, upon assembly, form a complete passage for the suspension liquid, wash water, and extraction of the filtrate. Handles on both sides of the filter plates are supported by beams and securely fastened by clamping devices. The filter cloth between the plates serves as a seal.
Under the pressure of the feed pump, the material liquid to be filtered is sent into each filter chamber, and separated from solid and liquid through the filter medium (suitable filter cloth chosen according to different industries). Filtrate forms on the filter cloth until it fills the filter chamber to create a filter cake. The filtrate passes through the filter cloth and flows along the filter plate grooves to the lower outlet channel, where it is discharged集中. After filtering, the filter cake can be washed with cleaning water. After washing, compressed air may be introduced to remove any remaining cleaning liquid. Once filtering is complete, the press filter is opened to remove the filter cake (stored between adjacent filter plates), clean the filter cloth, and then re-tighten the plate filter to start the next working cycle.