Corrosion inhibitor for circulating cooling water with high chlorine ion content of 3000mg/L-100000mg/L

Abstract

The invention provides a corrosion inhibitor for circulating cooling water with the high chlorine ion content of 3000mg/L-100000mg/L. The corrosion inhibitor comprises a liquid part and a solid part, wherein the liquid part is prepared from the following components by weight percent: 10%-30% of organic phosphonic acid, 10%-30% of organic carboxylic acid, 10%-25% of a substance with scale inhibition, corrosion inhibition and dispersion effects and the balance of water; and the solid part is prepared from the following components by weight percent: 15%-35% of tanning extract, 20%-35% of fulvic acid, 0-5% of sodium hydroxide and the balance of sodium salt. The corrosion inhibitor provided by the invention has high Cl<-> content tolerance in circulating water; when the Cl<-> content is 3000mg/L-100000mg/L, all technical index requirements including the scale inhibition rate, the metal corrosion rate and the bacterium and algae breeding rate required by an industrial circulating cooling water design specifications can be realized; and meanwhile, the number of times of concentration has a natural balance, the system is operated with zero emission, no wastewater is discharged, and the investment and operation costs of sewage treatment facilities can be greatly reduced.

Description

technical field [0001] The invention relates to a water treatment agent for circulating water, in particular to a corrosion and scale inhibitor for circulating cooling water with a high chloride ion content of 3,000-100,000 mg / L. Background technique [0002] In reality, some groundwater contains Cl - (chloride ion) is more than 150mg / L, and if it is slightly concentrated, it will exceed 700mg / L. The reverse osmosis method has a large investment and high water production cost. High, backwash water contamination. [0003] The inventor retrieved the following relevant patent documents: CN101125715A discloses a composite corrosion and scale inhibitor for treating high concentration ratio circulating water, including a liquid part and a solid part, based on the total weight of the liquid part 100%, the weight percentage of each component 5-40% of organic phosphonic acid, 5-40% of organic carboxylic acid, and 20-90% of water; based on 100% of the total weight of the solid part,...

AI Technical Summary

Problems solved by technology

[0004] The above technologies are crucial to how to use corrosion and scale inhibitors to treat circulating cooling water with high chloride ion content, and to achieve the scale inhibition rate, metal...

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