People often think that plate and frame Filter Presses are the same as diaphragm filter presses. In fact, the performance of Plate and frame filter presses and diaphragm filter presses is different. Friends who don't know much about filter presses regard plate and frame filter presses and diaphragm filter presses as the same machine. The following is a detailed introduction to the difference between plate and frame filter presses and diaphragm filter presses.

1. The basic principle and structure of plate and frame filter presses are the same as those of diaphragm filter presses. The difference is that the filter plate used in diaphragm filter presses has a diaphragm cavity on both sides. The diaphragm filter plate and the filter plate with the same shape are arranged at intervals to form filter chambers of a certain volume. When the material is filtered, a certain pressure of gas (liquid) is injected into the diaphragm cavity to make the diaphragm bulge and reverse the filter cake to achieve the purpose of reducing the moisture content of the filter cake.

2. Compared with the filter plate of ordinary box or plate and frame filter presses, the diaphragm filter plate has two filter surfaces that can move back and forth-diaphragms. When the pressing medium (such as compressed air) is introduced into the back side of the diaphragm, these movable diaphragms will bulge toward the filter chamber, that is, after the filtration process is over, the filter cake will be squeezed again under high pressure. The benefits brought to you by the diaphragm filter plate are: the filter process equipped with the diaphragm filter plate can reduce the water content of the filter cake by 10-40% compared with the ordinary filter plate. It can save you a lot of subsequent costs.

3. At the same time, when washing the filter cake, the amount of washing water can be reduced by squeezing the diaphragm, and the effect is better.

Working principle and advantages of diaphragm filter press

1. With the assistance of the feed pump, the diaphragm Chamber filter press inputs the filtered material into the filter chamber of the equipment. When passing through the filter cloth in the filter chamber (generally, the filter cloth can only allow liquid and very small solid particles to pass through), the liquid is dialyzed out of the filter cloth, and the solid is intercepted on the filter cloth, thus completing the function of the general filter press equipment.

2. The characteristic of the diaphragm chamber filter press is that it can perform secondary drying and squeezing of the filter cake. The special design of its filter chamber allows it to automatically close the feed valve after the filter chamber is filled with filter cake, and pass gas or liquid into the filter chamber to make the filter cloth expand and deform, thereby achieving the effect of secondary squeezing of the filter cake and further reducing the moisture.

3. Further introduction of gas can further reduce the moisture in the filter cake. High-pressure air passes through the filter cake, separating the capillary water, structural water and other moisture in the filter cake. This is the air drying method.