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Non-phosphorus compound scale and corrosion inhibitor for treatment of circulating cooling water

A scale and corrosion inhibitor, treatment cycle technology, applied in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc., can solve problems such as insufficient performance, secondary pollution, etc., and achieve low cost , use less, increase the effect of concentration multiples

Active Publication Date: 2005-06-01
BEIJING YANHUA XINGYE TECH DEV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a phosphorus-free composite scale and corrosion inhibitor for treating circulating cooling water to overcome the secondary pollution caused by the existing phosphorus-containing composite scale and corrosion inhibitor, and at the same time overcome the problem that only polyaspartic acid is used Insufficient Performance of Composite Scale and Corrosion Inhibitor Prepared with Acid (PASP)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this embodiment, carbon steel is used for corrosion experiments.

[0020] Preparation of composite agent: 4 mg PASP, 3 mg acrylic acid / acrylate copolymer, 3 mg sulfonic acid group-containing acrylic acid / acrylate copolymer, 3 mg sodium benzoate, 15 mg sodium molybdate, 2 mg zinc nitrate and 1 liter of water, at room temperature 20 ° C placed in a container and stirred evenly to obtain the composite scale and corrosion inhibitor of the present invention.

[0021] Formulated with Ca 2+ 350mg / l, HCO 3 - 300mg / l (all in CaCO 3 meter, the same below) water quality.

[0022] The compound agent and water quality of this embodiment were used to carry out the corrosion test of the rotating coupon, the test water temperature was 50° C., and the operation was performed for 72 hours. Experimental results: The corrosion rate of the test piece is 0.025mm / a. The composite agent and water quality of this embodiment were used to carry out static scale inhibition experiments. Wh...

Embodiment 2

[0024] In this embodiment, carbon steel is used for corrosion experiments.

[0025] Preparation of the composite agent: put 6mg PASP, 4mg acrylic acid / acrylate copolymer, 3mg potassium sorbate, 20mg ammonium tungstate, 2mg zinc bromide and 1 liter of water in a container and stir evenly at room temperature to obtain the composite scale inhibitor of the present invention Corrosion inhibitor.

[0026] Formulated with Ca 2+ 100mg / l, HCO 3 - 100mg / l (all in CaCO 3 meter, the same below) water quality.

[0027] The compound agent and water quality of this embodiment were used to carry out the corrosion test of the rotating coupon, the test water temperature was 50° C., and the operation was performed for 72 hours. Experimental results: The corrosion rate of the test piece is 0.036mm / a.

[0028] The composite agent and water quality of this example were used to conduct static scale inhibition experiments. When the concentration ratio was 6 times, the scale inhibition rate of c...

Embodiment 3

[0030] In this embodiment, copper materials are used for corrosion experiments.

[0031]Preparation of compounding agent: 6mg PASP, 5mg acrylic acid / acrylate copolymer containing sulfonic acid groups, 3mg sodium tetraborate, 25mg ammonium molybdate, 1mg dicyclohexylamine, 2mg zinc sulfate and 1 liter of water were placed in a container and stirred evenly, That is the composite scale and corrosion inhibitor of the present invention.

[0032] Formulated with Ca 2+ 100mg / l, HCO 3 - 100mg / l (all in CaCO 3 meter, the same below) water quality.

[0033] The compound agent and water quality of this embodiment were used to carry out the corrosion test of the rotating coupon, the test water temperature was 50° C., and the operation was performed for 72 hours. Experimental results: The corrosion rate of the test piece is 0.027mm / a. The composite agent and water quality of this example were used to conduct static scale inhibition experiments. When the concentration ratio was 6 time...

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Abstract

The composite phosphate-free scale inhibiting corrosion inhibitor for treating circular cooling water consists of scale inhibitor and corrosion inhibitor. The scale inhibitor consists of one or several of PASP, PVA, oxidized starch, polyacrylic acid, acrylic acid / acrylate copolymer and acrylic acid / acrylate copolymer with sulfo radical. The corrosion inhibitor consists of one or several of sodium salt / potassium salt / ammonium salt of organic salt, sodium / potassium / ammonium borate, nitrous organic matter, soluble molybdenate, soluble tungstate, soluble nitrate, soluble nitrite and soluble zinc salt. The composite scale inhibiting corrosion inhibitor has excellent scale inhibiting and corrosion inhibiting performance, is environment friendly, and is especially the treatment of hard circulation water with high calcium and high alkali content.

Description

Technical field: [0001] The invention relates to a water treatment agent, in particular to a phosphorus-free composite scale and corrosion inhibitor for treating circulating cooling water. Background technique: [0002] As we all know, my country is a country that is very scarce in fresh water resources. In some places, not only industrial water resources are very tight, but also civil water resources are also very short. Due to the tight water supply, the development of many projects has been restricted. In industry, industrial circulating cooling water is a major water user. Whether it is chemical industry, metallurgy, thermal power generation or large-scale central air-conditioning, circulating water is used for heat exchange. Therefore, improving the use efficiency of industrial or civil circulating water will save water resources and reduce Production costs and enhanced environmental protection are of great significance. [0003] After the early direct discharge of ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12
CPCC23F11/08C23F14/02
Inventor 赵艳辉姜殿虹史建公高秀莲盛铭钧宋云英沈辉朱印全焦阳容永源朱虹高辉李秉财陈奎正谢小华岳永红李玉梅
Owner BEIJING YANHUA XINGYE TECH DEV
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