Method for cleaning polypropylene fiber rope filtering elements of powdered resin filter

Abstract

The invention discloses a method for cleaning polypropylene fiber rope filtering elements of a powdered resin filter, which is designed to prolong the running period of the filter, prolong the service life of filter filtering elements and reduce the running cost. The method comprises the following steps of: firstly carrying out the deoiling circulation cleaning, establishing the cleaning circulation after fully filling water into the filter, starting heat-tracing steam to heat the filter, charging the compressed air into the filter for cleaning in a shaking manner, and completely discharging the residual liquid; secondly carrying out the deferrization circulation acid washing, establishing the cleaning circulation after fully filling water into the filter, starting heat-tracing steam to heat the filter, adding a raw liquid of a citric acid corrosion inhibitor to a membrane paving box, filling demineralized water into the membrane paving box, adding a mixed solution of the citric acid and ammonia water in the membrane paving box to the filter by a membrane paving injection pump, adding industrial ammonia water to the filter by the membrane paving injection pump, charging the compressed air into the filter for cleaning in a shaking manner, and completely discharging the residual liquid; finally carrying out the explosion membrane cleaning on the filter according to a conventional process.

Description

technical field [0001] The invention relates to a cleaning method for a stainless steel frame and a winding polypropylene fiber rope filter element in a powder resin filter polluted by oil and iron in the condensed water treatment of an air-cooling unit. Background technique [0002] Most of the air-cooled units of power plants in northern my country choose powder resin filters as the main equipment of the condensate polishing system. With the increase of filter operation time, the filter elements are polluted by iron and oil, the color of the filter elements becomes darker, and some parts of the filter elements It is covered by things like grease and rust, and part of it is black, which causes the pressure difference to rise rapidly during the operation of the filter, and the quality of the effluent water deteriorates, which leads to shortened operation cycle, frequent membrane explosion and membrane laying; with the increase of operation time, the filter The element fouling ...

AI Technical Summary

Problems solved by technology

[0002] Most of the air-cooling units in northern my country’s power plants choose powder resin filters as the main equipment of the condensate polishing system. As the filter’s operating time increases, the filter element suffers from iron and oil pollution, the color of the filter element becomes darker, and some parts of the filter element It is covered by things like grease and rust, and part of it is black, which causes the pressure difference to rise rapidly during the operation of the filter, and the quality of the effluent water deteriorates, which leads to shortened operation cycle, frequent membrane explosion and membrane laying; with the increase of operation time, the filter The element fouling is more serious and cannot meet the operation requirements, and a new filter element must be replaced, thus increasing the operating cost