Membrane back-washing equipment of cross-flow type membrane filtration system

Application Number: 00110383
Application Date: 2000.04.30
Publication Number: 1321540
Publication Date: 2001.11.14
Priority Information:
International: B01D65/02
Applicant(s) Name: China petro-Chemical Corp.
Inventor(s) Name: Guo Hongshan;Han Jianhua;Zhou Guosong
Patent Agency Code: 21102
Patent Agent: li wei
Abstract A membrane back-flushing equipment adopts double-piston structure to form two gas chambers, when high-pressure gas is fed into one gas chamber, and the piston of said gas chamber is driven and moved, the gas of another gas chamber can be quickly released, and the piston of said gas chamber can be driven by piston of the former gas chamber and moved so as to quickly change piston position and reset the piston, so that it can overcome the defect of reliance on membrane permeation side fluid pressure to reset piston and solve the problems of that the membrane permeation flux can be downward reduced and the concentration polarization and membrane blockage can be produced in the course of ultrafiltration or microporous membrane filtration of fluid. Said equipment can utilize the permeable clean liquor to back-flush filtering membrane regularly or irregularly.