A kind of plate and frame filter cloth circulating lye cleaning operation method

Abstract

This invention discloses a method for cleaning plate and frame filter cloth with circulating alkaline solution. The method includes the following steps: S1, opening the inlet valve of the alkaline solution tank, closing the inlet valve when the inlet volume reaches a predetermined volume, and checking whether the pH value of the solution is within the range of 10-14; S2, opening the steam valve of the alkaline solution tank to allow steam to enter the alkaline solution tank, and completely closing the steam valve when the temperature steadily rises to a predetermined temperature; S3, after closing the plate and frame flaps, starting the main cylinder clamping device, the plate and frame pressure gradually rises and remains stable, and sequentially closing the lower outlet valves on the left and right sides of the plate and frame, the main outlet valve of the plate and frame, and the bottom flow valve of the APV collection tank; S4, opening the outlet valve of the alkaline solution tank and opening the return valve at the top of the alkaline solution tank to establish a return circulation channel, starting the automatic cleaning program of the plate and frame until the edge of the filter cloth turns white, and then recovering the alkaline solution. This invention solves the problem of easy clogging of plate and frame filter cloth by using alkaline solution to circulate and soak the filter cloth, achieving the cleaning goals of high efficiency, low consumption, and environmental protection.

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