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Weldability and material selection of frame material of diaphragm filter press
- 2021-09-18-

Diaphragm filter press has the advantages of high pressing pressure, good corrosion resistance, convenient maintenance, safety and reliability.

The main difference between the diaphragm filter press and the general box filter press is that two elastic membranes are installed on the two sides of the filter plate (the composite rubber diaphragm is the whole diaphragm). During the operation, when the feeding is completed, it can be The high-pressure fluid medium is injected into the diaphragm plate, and then the whole diaphragm will bulge, press the filter cake, and then realize further dehydration of the filter cake, that is, squeeze filtration.

The frame has an important influence on the service life of the diaphragm filter press. Among all the production components of the filter press, the function of the filter press frame is to support and constrain the filter mechanism, so that the filter mechanism can meet the requirements of filtration, pressing, washing and filtering. The functional requirements of cakes, etc. The frame is the basic part of the filter press, and the two ends are the head device, the tail device and the moving plate. The beams on the two sides connect the two, and the beam is also used to support the filter plate device and the moving plate. equipment etc.

There are many factors that affect the welding quality and welding cost, among which the weldability of the selected material cannot be ignored. Therefore, when selecting materials, the physical and mechanical properties of the material (base metal) such as strength, resistance, wear resistance and corrosion resistance should be considered. At the same time, we also pay attention to the weldability of materials. As a load-bearing and operating pressure-bearing component, the frame is used as a load-bearing and operating pressure-bearing component, and the deformation control of components requires high-scale precision control. Therefore, it is recommended that the frame material is Q345, and Q345 has good comprehensive mechanical properties. It has the characteristics of good weldability and high mechanical strength. At the same time, it needs to be covered with 316L stainless steel according to the requirements of anti-corrosion in the application environment.

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