Efficient environment-friendly pre-filming agent

Abstract

The invention discloses an efficient environment-friendly pre-filming agent which comprises the following components in percentage by mass: 20%-40% of acrylate sulfonate copolymer, 1%-10% of sodium gluconate, 2%-10% of zinc salt, 0.5%-3% of benzotriazole, 0.5%-3% of concentrated sulfuric acid and the balance of water, wherein the solid content of the acrylate sulfonate copolymer is greater than or equal to 25.0%, and the number-average molecular weight of the acrylate sulfonate copolymer is 2000-15000; and the zinc salt is one or a mixture of two of zinc chloride and zinc sulfate. The pre-filming agent does not contain phosphorus, does not cause eutrophication to water quality during use, does not need to add acid to adjust the acidity of a solution during pre-filming of an industrial circulating water system, has a remarkable pre-filming effect, greatly shortens the pre-filming time, does not need system replacement and water quality discharge after pre-filming, and can be directly converted into normal operation of the system, thereby saving water resource and being friendly to the environment.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a phosphorus-free pre-film treatment technology for industrial circulating cooling water systems. Background technique [0002] The industrial circulating cooling water system needs to be cleaned and pre-filmed before the operation of the new system, and the pre-filmed treatment must be carried out in time after the old system is cleaned. After pre-filming, a dense protective film will be formed on the metal surface, which can effectively slow down the corrosion rate, prolong the service life of pipelines and heat exchangers, and ensure the normal operation of the system. [0003] At present, most industrial circulating water treatment uses phosphate as a pre-film agent. This formula has a high phosphorus content, which has problems of water pollution and eutrophication, and cannot meet the environmental protection and direct dis...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the industrial circulating water treatment uses phosphate as the pre-film agent. This formula has a high phosphorus content, and there are problems of water pollution and eutrophication, which cannot meet the environmental protection and direct discharge standards.

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