Alkaline cleaning agent for hollow fiber ultrafiltration membrane as well as preparation method and application thereof

Abstract

The invention relates to an alkaline cleaning agent for a hollow fiber ultrafiltration membrane as well as a preparation method and an application of the alkaline cleaning agent, and belongs to the technical field of cleaning agent processing. The cleaning agent is prepared from the following raw materials in parts by weight: 45-65 parts of water, 25-35 parts of a pH regulator, 2-8 parts of a chelating dispersant, 2-10 parts of a membrane protective agent, 0.5-1.5 parts of plant polyphenol, 6-11 parts of a nonionic penetrating agent, 1.5-2.5 parts of glycerol block polyether, 3.2-5.1 parts offatty alcohol-polyoxyethylene ether, 6.4-10.2 parts of fatty alcohol-polyoxyethylene ether sodium sulfate and 8.5-11.5 parts of lauryl sodium sulfate. According to the alkaline cleaning agent, after the hollow fiber ultrafiltration membrane is polluted and cleaned for multiple times, the hollow fiber ultrafiltration membrane has a relatively high membrane flux recovery rate and a good cleaning effect. The alkaline cleaning agent also has the advantages of simplicity and convenience in preparation, convenience in control and convenience in use.

Description

technical field [0001] The application relates to the technical field of cleaning agent processing, more specifically, it relates to an alkaline cleaning agent for hollow fiber ultrafiltration membranes and its preparation method and application. Background technique [0002] Ultrafiltration membrane is a microporous filtration membrane with uniform pore size and rated pore size range of 0.001-0.02μm, which is used in unit operations of biological products, pharmaceutical products, sewage treatment, etc. The hollow fiber ultrafiltration membrane is a kind of ultrafiltration membrane. When the hollow fiber ultrafiltration membrane is used in the MBR treatment system, the raw water flows under pressure outside the hollow fiber or in the inner cavity, respectively forming an external pressure type and an internal pressure type. Filtration is a dynamic filtration process. Clear water is discharged through hollow fibers, and the intercepted substances can be discharged with conce...

AI Technical Summary

Problems solved by technology

The method of physical cleaning can quickly restore the water permeability of the hollow fiber ultrafiltration membrane to a certain extent in a short period of time, not only the recovery rate of the membrane flux is low, but also the hollow fiber ultrafiltration membrane used again has a rapid decline rate

The way of chemical cleaning is to use chemical reagents to clean the pollutants on the surface of the hollow fiber ultrafiltration membrane. The commonly used chemical reagents are hydrochloric acid, sodium hydroxide, sodium hypochlorite, hydrogen peroxide, citric acid, etc., which can clean metal ions, inorganic salts and inorganic Scale pollution has a good removal effect, but it is difficult to remove organic proteins, and after repeated pollution and cleaning of the hollow fiber ultrafiltration membrane, the membrane flux of the cleaned hollow fiber ultrafiltration membrane recovers. rate is small

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