Composite pre-filming fluid for condenser copper tube

Abstract

The invention discloses a composite pre-filming fluid for a condenser copper tube. The composite pre-filming fluid consists of the following raw material components in parts by weight: 20-30 parts of nickel sulfate, 8-10 parts of nickel chloride, 5-10 parts of aluminum sulfate, 5-10 parts of copper sulfate, 3-5 parts of 2-benzothiazolylazo-7-(4-carboxyphenylazo)-chromotropic acid, 8-10 parts of 1-(2'-benzothiazole)-3-(4'-carboxybenzene) triazene, 8-10 parts of 2-aminobenzothiazole, 3-5 parts of limes, 3-5 parts of sodium carbonate, 5-6 parts of citric acid and 100-120 parts of deionized water. The composite pre-filming fluid for the condenser copper tube disclosed by the invention solves the problem that protective films are restricted to a partially-acidic outer environment, and strengthens alkali resistance of the protective films; two protective films are staggered with each other, so that the formed composite protective film is wider in adaptive value, and capable of adapting to better pH value changes, and therefore, the adaptive capacity of the protective films to an acid-base environment is greatly improved, and the problems, caused by the protective films, on the environment are solved.

Description

technical field [0001] The invention relates to the technical field of pre-film liquid, in particular to a composite pre-film liquid for condenser copper tubes. Background technique [0002] At present, the condensers of most thermal power plants in my country use circulating cooling water to cool the condensers. Due to the water quality characteristics of circulating cooling water, corrosion of the copper tubes of the condensers is common, making the condenser The service life of the condenser is reduced, which is extremely harmful. Therefore, various scientific research units and power plants are actively trying to find ways to protect the copper tubes of the condenser. Film forming method, copper reagent modeling method, etc., but these measures only protect the water chamber at both ends of the condenser, the tube sheet and the tube end, and cannot effectively protect the copper tube, and the surface protective film of the copper tube will inevitably be damaged, thus affec...

AI Technical Summary

Problems solved by technology

[0002] At present, the condensers of most thermal power plants in my country use circulating cooling water to cool the condensers. Due to the water quality characteristics of circulating cooling water, corrosion of the copper tubes of the condensers is common, making the condenser The service life of the condenser is reduced, which is extremely harmful. Therefore, various scientific research units and power plants are actively trying to find ways to protect the copper tubes of the condenser. Film forming method, copper reagent modeling method, etc., but these measures only protect the water chamber at both ends of the condenser, the tube sheet and the tube end, and cannot effectively protect the copper tube, and the surface protective film of the copper tube will inevitably be damaged, thus affecting the condensation. vaporizer service life