The surface of the filter plate has small black spots and a mold base to support the filter cloth. There are buried holes on the management office and edge of the filter plate, which form a detailed safety exit after assembly, which can enter mixed liquid, clean water and lead leachate. Both sides of the filter plate are equipped with handle shoulder on the load-bearing wall, and the filter plate is tightened by clamping machine equipment. The filter cloth in the middle of the filter plate plays a sealing role.

Under the working pressure of the feed pump, the raw material liquid that must be filtered is sent to each filter chamber, and the solid and liquid are extracted according to the chemical substances that have been filtered. Sedimentation is caused on the filter cloth until the filter chamber is filled with a filter cake. The leachate flows through the filter cloth and along the groove of the filter plate to the safety outlet of the liquid outlet below, and is discharged centrally. After the over-treatment, the sediment can be washed with clean water. After cleaning, sometimes into the compressed air, remove the remaining cleaning liquid. After filtering, open the filter plate of the filter press to remove the filter cake, clean the filter cloth, and clamp the plate again to filter slowly for the next cycle.

The filter cloth is fixed on the belt filter press. It is an important filter plate method of the filter press in the early stage. The important advantage of the belt filter press is that it is convenient and quick to disassemble the filter cloth. The disadvantage is that the efficiency is high and low, the expected effect of over-filtration is not good, and the filter plate is easy to break. The filter chamber of the belt filter press is composed of two filter plates with adjacent pits. The filter cloth is fixed on one filter plate, the important advantages of belt filter press are high efficiency, very good expected effect, and relatively strong and durable filter plate. However, the technical strength of automation technology is high, and there is also protection equipment for cleaning filter cloth. Generally, the number of times of removing filter cloth is not often.

Influencing factors

Feeding working pressure

In the actual production process, the excessive working pressure is generally given by the feeding pump. Therefore, the feeding working pressure of the feeding pump is the crucial factor that damages the excessive working pressure. The working pressure of feeding material immediately damages the operation of the filter plate of the filter press, and the expected effect of the filter plate of the filter press is also closely related to it. In the actual application, it is found that in the whole process of the membrane filter press drying, the porosity of the filter cake is reduced according to the liquid negative pressure, and most of the water can be discharged, but only by increasing the liquid static working pressure, the expected effect of drying is not ideal. The analysis of the reason is very likely to be: with the expansion of the working pressure, the porosity of the filter cake gradually reduced, the saturation of the filter cake porosity gradually reduced, but when the saturation of the filter cake is close to the residual saturation, most of the filter cake moisture can not be reduced. According to the analysis of the ultrastructure of the filter cake, it is known that the fine particles form a stone arch bridge structure at this time. The water contained in this structure not only cannot be discharged by the liquid static working pressure provided by the feed pump, but also causes equipment damage and common problems.