Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes

Abstract

The invention discloses an alkaline cleaning agent and a bactericide applicable to ultra-filtration membranes or reverse osmosis membranes. The alkaline cleaning agent comprises 5-10% of sodium hydroxide, 2-5% of polyphosphate, 0.5-2% of anionic surfactants, 5-10% of permeating agents, 20-30% of chelating agents, 2-5% of dispersing agents, 5-10% of stripping agents and the balance water. The alkaline cleaning agent and special reverse osmosis bactericides are mixed with one another to obtain the bactericide. The bactericide comprises 2-3% of the alkaline cleaning agent, 0.1-0.5% of the special reverse osmosis bactericides and the balance water. The alkaline cleaning agent and the bactericide have the advantages that the cleaning agent is excellent in cleaning performance, is in a compound type formula and is little in environmental pollution; the alkaline cleaning agent and the bactericide are not single basic chemical raw materials, accordingly, good cleaning effects can be realized, and the alkaline cleaning agent and the bactericide are suitable for diversified pollutants and low in application amount.

Description

technical field [0001] The invention relates to an alkaline cleaning agent and a bactericide suitable for ultrafiltration membranes or reverse osmosis membranes. Background technique [0002] Reverse osmosis membrane elements currently rely on imports in China, mainly three American brands: DOW, HYDRANAUTICS; General Electric Company (GE for short). Ultrafiltration membrane elements are mainly produced by importing American GE, Dow, and several major domestic companies. [0003] The filtration pore size of reverse osmosis membrane elements is 0.5-10 nanometers, which can physically intercept and remove impurities, bacteria, and salt in water. It has only been used in China for less than 20 years. It is a new type of physical water treatment method. The scientific maintenance of reverse osmosis, the most important thing is to ensure the high desalination rate and high water volume of the membrane elements, and prolong the service life of the membrane elements, which is still...

AI Technical Summary

Problems solved by technology

Because the cleaning and decontamination are not thorough, the maintenance time is not long. After a short period of operation, the system operating parameters are not ideal again, and it needs to be cleaned again. The cleaning cycle is too short

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