Composition for scale and corrosion inhibitor, scale and corrosion inhibitor and application thereof

Abstract

The present invention discloses a scale-inhibiting corrosion inhibitor composition, a scale-inhibiting corrosion inhibitor, and applications of the scale-inhibiting corrosion inhibitor. The scale-inhibiting corrosion inhibitor composition contains 1-[N,N'-bis(2-hydroxyethyl)aminomethyl]benzotriazole or a derivative thereof, a carboxylic acid group-containing homopolymer, a sulfonic acid group-containing copolymer and a water-soluble zinc salt according to a weight ratio of 1:0.5-10:0.5-10:0.3-7.5, preferably 1:2-5:2-5:0.5-3.5. According to the present invention, the environmentally friendly scale-inhibiting corrosion inhibitor does not use phosphorus-containing compounds, non-renewable molybdates or tungstates, and the like, has characteristics of no phosphorus and no nitrogen, provides high tolerance for calcium and alkali, has characteristics of high-concentration-chlorine-ion-corrosion resistance, high-concentration-sulfate-ion-corrosion resistance and wide water quality adaptation range, and provides technical conditions for circulation water operating under high concentration multiple and sewage discharge reducing; and the scale-inhibiting corrosion inhibitor has advantages of excellent scale-inhibiting corrosion inhibition, less addition amount, simple treatment process, significant effect, and easy promotion application when the scale-inhibiting corrosion inhibitor is applied in the circulation water system.

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 inhibitor , the non-phosphorus corrosion and scale inhibitor contains lignin and tannin mixture 12-16%, water 55-65%, NaOH 0.7-0.8%, H 2 SO 4 1.7-2.2%, triethanolamine 12-16%, maleic anhydride 4-6%, borax 3-5%; CN101591074A discloses a phosphorus-free water treatment with excellent corrosion and scale inhibition performance and effective control of microorganisms and slime hazards In the phosphorus-free water treatment agent, the phosphorus-free corrosion and scale inhibitor is 15-25%, the ternary is (AMPS) 8-12%, the zinc chloride is 6-10%, polyma 6-10%, room Warm water 40-65%

[0006] Because the scale and corrosion inhibition products disclosed above have high use concentration, large amount of compounding, difficult compounding, difficult detection and operation, narrow adaptability to water quality and poor scale and corrosion inhibition effect, it is difficult to popularize and use them.

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