One function of the filter plate is to enhance the effect of the filter chamber walls, thereby increasing the area of filter cloth attached to the filter plate. During the initial design of a pressure filter, to accommodate the purpose of filtration, the direct approach to achieve this is to increase the area of filter cloth inside the pressure filter. Since the filter cloth is attached to the filter plate walls, it necessitates expanding the area of the filter chamber walls within the limited space. The filter chamber of a pressure filter is composed of individual filter plates, each plate's area constitutes the surface area of the filter chamber wall, and each plate can have a corresponding filter cloth filtering area. As long as it stays within the pressure and load-bearing capacity, the effective filtering area of the pressure filter can be increased several times over. This is the crucial role of the filter plate in a pressure filter, and it is the reason why filter plates are indispensable for all pressure filter equipment.
Another function of the filter plate is to establish a storage space for the filter cake. The filter plates of the press filter are designed with an inward concave shape from the outset. This design is to provide space for the volume of the filter cake when intercepted by the filter cloth, and the blind spot at the bottom is to increase the friction on the filter cake, enhancing its support. Thus, the filter plate plays a role in storing and supporting the filter cake.
In summary, the filter cloth of the press filter plays a crucial role in establishing storage space for filter cake within the equipment and increasing the filter wall area, which is a necessary condition for the use of press filters in today's high-speed industrial production.