What's the operation principle?

The main difference between the diaphragm press and the ordinary van filter press is that a layer of elastic membrane diaphragm plate is installed between the filter plate and the filter cloth. During the operation process, when the feeding is finished, the high-pressure fluid medium can be injected between the filter plate and the diaphragm, then the whole diaphragm will bulge and press the filter cake, so as to achieve further dehydration of the filter cake, that is, press filtration.

First of all, positive pressure dehydration, also known as slurry dehydration, that is, a certain number of filter plate under the action of strong mechanical force is closely arranged in a row, filter plate surface and filter plate surface between the formation of a filter chamber, filter material in the strong positive pressure is sent into the filter chamber, filter material into the solid part of the filter medium (such as cloth) intercepted filter cake, liquid part through the filter medium and discharged into the filter chamber. In order to achieve the purpose of solid-liquid separation, with the increase of positive pressure, solid-liquid separation is more thorough, but from the perspective of energy and cost, too high positive pressure is not cost-effective.

After the dehydration is completed, the mechanical compression force of the filter plate is lifted, and the filter plate is gradually pulled apart, and the filter chamber is opened to unload cake. According to the different properties of the filter material, the filter press can be set respectively into the slurry dehydration, extrusion dehydration, wind dehydration or single, double dehydration, the purpose is to minimize the water content of the filter cake.