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Highly effective corrosion and scale inhibition disperser

A technology of corrosion and scale inhibition and dispersant, which is applied in the field of corrosion and scale inhibition and dispersant

Inactive Publication Date: 2008-05-14
SHENYANG DONGDA YOULIAN ENVIRONMENTAL IND
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Problems solved by technology

[0021] Aiming at the problems existing in the existing corrosion and scale inhibition dispersants, the present invention provides a corrosion and scale inhibition dispersant with strong adaptability, which can achieve effective corrosion inhibition and scale inhibition and dispersion in the water treatment process under high temperature conditions, without break down the drug

Method used

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Embodiment Construction

[0026] The raw materials of hydroxyethylene diphosphonic acid, ethylenediaminetetraacetic acid disodium salt and zinc sulfate are all required to have a purity of more than 95 wt% (the above raw materials are all marketed products). The preparation steps are: first weigh 60g of hydroxyethylene diphosphonic acid, 30g of ethylenediaminetetraacetic acid disodium salt, and 10g of zinc sulfate, and add them to a beaker in turn at room temperature and under stirring conditions, and finally add 0.1g of manganese sulfate compound to obtain the corrosion and scale inhibitor dispersant required by the present invention.

[0027] The laboratory static simulation experiment was carried out on the above-mentioned prepared medicament, the treatment water temperature was 90°C, and the maximum temperature during the dynamic experiment water treatment could reach 200°C. The measured performance indicators are as follows:

[0028] Raw water calcium hardness: 389mg / L, calcium hardness after dos...

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Abstract

The invention relates to a highly efficient corrosion and scale inhibition dispersant. The weight ratio of the components, etidronic acid, ethylene diamine tetraacetic acid disodium salt and zinc sulfate is 6:3:1. Then manganese sulfate with a weight of 0.001 times as much as the materials is added as an additive. The preparation method is as follows: under normal temperature and stirring conditions, the materials, etidronic acid, ethylene diamine tetraacetic acid disodium salt and zinc sulfate are put into a container as the weight ratio, and then the manganese sulfate is added as an additive. The invention has the advantage that the invention has solved the problem in the prior art that the reclaimed water treatment agent is only suitable for low-temperature water treatment, but not for high-temperature water treatment. The invention is quite suitable for stabilizing treatment of circulating water quality in metallurgy, petroleum, chemical industry and power generation.

Description

technical field [0001] The invention relates to a corrosion-inhibiting and scale-inhibiting dispersant for industrial circulating water. Background technique [0002] Circulating cooling water treatment technology was developed abroad in the early 1930s. [0003] In the 1930s, with the expansion of industrial production scale, circulating water became one of the main water used in industrial production, and scaling was the main problem. In 1936, Lalngelier proposed the concept of saturation index, and began to use polyphosphate and natural organic matter to control the generation of hard scale, but the effect was poor in high hardness and high alkali water. [0004] In the early 1960s, due to the use of highly concentrated inorganic acids to control the pH value of water to control scaling, which would cause aggravated corrosion, chromate-polyphosphate active salts were used for corrosion inhibition and chlorine gas was used for sterilization. Chemical water treatment tech...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F103/02
Inventor 刘梅英厉东李阳张军英苏永渤
Owner SHENYANG DONGDA YOULIAN ENVIRONMENTAL IND
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