The working principle of diaphragm filter press and its advantages

People often think that Plate And Frame Filter presses are the same as diaphragm Filter Presses . In fact, the performance of a Plate And Frame Filter Press is different from that of a Diaphragm filter press. Those who don't know much about Filter presses think that plate and frame filter presses are the same machine. Here Hongfa will introduce the difference between plate and frame filter presses and membrane filter presses in detail.

1. The basic principle and structure of the Plate and Frame Filter Press is the same as that of the Diaphragm Filter Press. The difference is that the Filter Plate used in a diaphragm Filter Press is a double-sided diaphragm chamber. The diaphragm filter plate and the shape of the same filter plate between the spacing arrangement to form a certain volume of the filter chamber.       After the material has been filtered, a certain pressure of gas (liquid) is injected into the diaphragm chamber, which causes the diaphragm to bulge and reverse the pressure of the filter cake, thus reducing the water content of the filter cake.

2、Compared with the filter plate of ordinary chamber or plate and Frame Filter Press , the diaphragm filter plate has two movable filtration surfaces, the diaphragm, which can be moved back and forth. When the press medium (e.g. compressed air) passes through the back side of the diaphragm, these movable diaphragms bulge out in the direction of the filter chamber, i.e. after the filtration process is completed, the filter cake is squeezed again at high pressure. The advantage of a membrane filter plate is that the water content of the cake can be 10-40% lower in a filtration process with a membrane filter plate than with a normal filter plate. It can save you a lot of money in subsequent costs.

3、at the same time, when washing the filter cake, can make the washing water less through the press diaphragm, the effect is better

The working principle of diaphragm Filter press and its advantages

1. With the help of the transfer pump, the diaphragm Chamber Filter Press feeds the filter into the filter chamber of the equipment, and through the filter cloth inside the filter chamber (the normal filter cloth only allows liquid and very small solid particles to pass through), the liquid is percolated out of the filter cloth, and the solids are intercepted on the filter cloth, thus completing the function of the normal filter press equipment.

2. The diaphragm chamber filter press is characterized by the possibility of secondary drying and pressing of the filter cake. The special design of the filter chamber makes the filter chamber full of filter cake, then automatically close the feed valve and pass the gas or liquid into the filter chamber to make the filter cloth expand and deform, so as to achieve the effect of secondary pressing of the filter cake and further reduce the moisture.

3. further into the gas to further reduce the water in the filter cake. High-pressure air is passed through the filter cake to separate the capillary water and structural water in the cake. This is the blow-drying method.