Device for reducing pressure fluctuation of pressure filter frame and pressure filter

A pressure filter comprising:

• a drum;
• a frame, which is a cylindrical housing and comprises a shell provided with a feeding port and a discharging port;
• and
• a device for reducing pressure fluctuation of the frame of the pressure filter, said device comprising:
• a buffer plate disposed on an inner wall of the shell and provided with a plurality of openings, wherein a gap is remained between the buffer plate and the inner wall of the shell, and
• a plurality of supporting posts disposed within the gap between the buffer plate and the inner wall of the shell, and welded between the inner wall of the shell and the buffer plate, so as to fixedly connect the inner wall of the shell with the buffer plate.