Method for cleaning reverse osmosis membrane element

Abstract

The invention discloses a method for cleaning a reverse osmosis membrane element. The method comprises the following steps: soaking the reverse osmosis membrane element in a non-oxidative bactericide; carrying out conventional closed-cycle cleaning on the soaked reverse osmosis membrane element with a detergent; flushing the cleaned reverse osmosis membrane element with de-mineralized water; preparing an alkaline cleaning solution by taking de-mineralized water as a solvent; carrying out conventional closed-cycle cleaning on the flushed reverse osmosis membrane element with the prepared alkaline cleaning solution; cleaning the cleaned reverse osmosis membrane element with de-mineralized water, thereby completing the cleaning of the reverse osmosis membrane element. According to the method, the hydrochloric acid added detergent and the special prepared alkaline cleaning solution are adopted to carry out cleaning, so that organic matters, colloids and residual bacteria can be effectively removed, the damage to the membrane element caused by chemical agents is reduced, the pollution to the membrane element caused the bacteria is avoided, the efficiency of use of the membrane element is increased, and the service life of the membrane element is prolonged.

Description

technical field [0001] The invention belongs to the field of membrane cleaning, and in particular relates to a cleaning method for a reverse osmosis membrane element. Background technique [0002] As a brand-new water treatment technology, reverse osmosis has penetrated into various industrial fields. In the actual application process, reverse osmosis membrane production enterprises have a wide range of universality, but lack of pertinence, and the cleaning method of membrane elements is also simple. Acid and alkali repeated cleaning. [0003] The treatment of low temperature, low turbidity, and high organic matter water has always been a difficult problem in the water treatment industry. The membrane elements after reverse osmosis treatment of this type of water will greatly increase the efficiency of the membrane due to the conventional cleaning agent formula and improper cleaning methods. Reduced, shortened service life will lead to low actual processing efficiency of th...

AI Technical Summary

Problems solved by technology

[0003] The treatment of low temperature, low turbidity, and high organic matter water has always been a difficult problem in the water treatment industry. The membrane elements after reverse osmosis treatment of this type of water will greatly increase the efficiency of the membrane due to the conventional cleaning agent formula and improper cleaning methods. Reduced, shortened service life, will lead to low actual processing efficiency of the system, high operating costs, resulting in the need for frequent membrane replacement, increased energy consumption and property losses