Composition used in scale-inhibition corrosion inhibitor, scale-inhibition corrosion inhibitor, and application thereof

Abstract

The invention discloses a composition used in a scale-inhibition corrosion inhibitor, a scale-inhibition corrosion inhibitor, and an application thereof. The composition used in the scale-inhibition corrosion inhibitor comprises cyclodextrin and/or a cyclodextrin derivative, a carboxylic-acid-group-containing homopolymer, a sulfonic-acid-group-containing copolymer, and selectively hydroxycarboxylic acid with a weight ratio of 1:0.2-20:0.04-15:0.2-30:0-20. The scale-inhibition corrosion inhibitor provided by the invention is environment-friendly. According to the invention, the application of phosphorus-containing compound or non-renewable molybdate or tungstate is prevented, such that the scale-inhibition corrosion inhibitor is phosphorus-free and nitrogen-free. The scale-inhibition corrosion inhibitor has high tolerance to calcium and alkali, resistance to corrosion of high-concentration chloride ion and sulfate ion, and wide applicability to water quality. Therefore, technical condition is provided for operation of circulation water under high concentration multiple and for reducing sewage discharge. The scale-inhibition corrosion inhibitor provided by the invention has excellent scale inhibition and corrosion inhibition performances in circulation water system application. With the scale-inhibition corrosion inhibitor, a dose is low, scale-inhibition treatment process is simple and substantial effect is provided. The scale-inhibition corrosion inhibitor is suitable for popularization.

Description

technical field [0001] The invention relates to a scale and corrosion inhibitor composition, a scale and corrosion inhibitor and applications thereof. Background technique [0002] Water is the basic condition for human survival, but water resources in the world are limited. my country's per capita water volume is only a quarter of the world's per capita water volume, and water resources are even poorer. With the rapid development of industry, the ecological balance of water has been seriously damaged day by day. In order to solve the water resource crisis and adapt to sustainable development, it is necessary to save water reasonably. The amount of cooling water in industrial water accounts for 60-80% by weight of the total water consumption. Therefore, the main goal of saving industrial water is to recycle cooling water, improve the reuse rate as much as possible, and reduce sewage discharge. However, during the use of cooling water, with the continuous circulation and c...

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Problems solved by technology

[0005] CN1754840A discloses a corrosion and scale inhibitor for industrial cooling water systems, comprising acrylic acid-acrylate-sulfonate copolymer, mercaptobenzothiazole, sodium humate, lignin and water, but sodium humate and lignin The source of the element is miscellaneous, the quality is unstable, and the treatment effect is poor; CN1609020A discloses a method for treating corrosion and scale inhibition water containing polyepoxysuccinic acid, which is to use polyepoxysuccinic acid or polyepoxysuccinic acid and glucose acid or gluconate and zinc salt (Zn 2+ ) used in conjunction with the corrosion and scale inhibition method, but polyepoxy succinic acid basically has no dispersion function and corrosion inhibition function, and it is easy to cause the deposition of zinc salts, resulting in low corrosion inhibition performance; CN101591073A discloses a non-phosphorus corrosion and scale inhibi

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