High efficiency scale and corrosion inhibitor for treating industrial circulating cooling water

Abstract

The invention discloses a high efficiency scale and corrosion inhibitor for treating industrial circulating cooling water. The high efficiency scale and corrosion inhibitor comprises, by weight, 8-10 parts of 2-phosphonic butane-1, 2, 4-tricarboxylic acid, 8-10 parts of polyamino polyether methylene phosphonates, 8-10 parts of etidronic acid, 8-10 parts of DTPMPA, 6-8 parts of 2-hydroxyphosphonoacetic acid, 6-8 parts of acrylic-HPA-AMPS terpolymer, 6-8 parts of hydrolyzed polymaleic anhydride, 10-12 parts of zinc sulfate heptahydrate, and 1-2 parts of methylbenzotriazole. The corrosion rate of stainless steel and brass is not more than 0.0006mm / a, which is far superior to the standard of 0.005 mm / a, and the scale inhibition rate is up to 98%. The inhibitor has excellent scale inhibition and corrosion resistance, and also has the effect in dispersing water-contained oxides and organic scale in poor-quality water. It also can effectively prevent formation of scale, and microbial clay, and thus has a good scale effect and a significant solubility limit effect.

Description

technical field [0001] The invention relates to the technical field of scale and corrosion inhibitors, in particular to a high-efficiency scale and corrosion inhibitor for treating industrial circulating cooling water. Background technique [0002] Human beings have used water treatment methods for many years. Physical methods include the use of various filter materials with different pore sizes, and the use of adsorption or barrier methods to exclude impurities in water. The most important adsorption method is to use activated carbon for adsorption. The barrier method is to pass water through the filter material, so that the larger impurities cannot pass through, and then obtain cleaner water. In addition, the physical method also includes the sedimentation method, which is to let the impurities with a smaller specific gravity float on the water surface to remove them, or Impurities with larger specific gravity are deposited below, and then obtained, while chemical methods ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of high-efficiency scale and corrosion inhibitor for treating industrial circulating cooling water, so as to solve the problem that the circulating water with electrical conductivity greater than 10000μs / cm is less effective and the scale inhibition rate is lower. , the corrosion rate of stainless steel, brass and Q235 carbon steel is high, which affects the service life

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