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Environment-friendly type composite corrosion and scale inhibitor

A corrosion and scale inhibitor, environmental protection technology, applied in the field of water quality stabilizer for circulating water treatment, can solve problems such as phosphorus pollution, and achieve the effects of stable operation promotion, good economic benefits, and excellent protection.

Inactive Publication Date: 2007-02-28
BEIJING HANBOYING ELECTRIC POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides an environment-friendly composite corrosion and scale inhibitor for treating circulating cooling water, which has the characteristics of environmental protection and high-efficiency scale inhibition. pollution problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation of the environment-friendly corrosion and scale inhibitor:

[0029] Add 15.0% epoxysuccinic acid, 5.0% sodium tungstate, 12.5% ​​sodium salicylate, 20.0% sodium tetraborate, 1.2% mercaptobenzothiazole and deionized water into the container, heat and stir to 50 ℃, continue to stir until completely dissolved, and then the environment-friendly composite corrosion and scale inhibitor of the present invention is obtained.

[0030] Experiments were carried out under the following water quality conditions: Ca 2+ 6.61mg / L, Mg 2+ 1.12mg / L, Cl - 11.74mg / L, SO 4 2- 2.82mg / L, total alkalinity 36.19mg / L, conductivity 160μs / cm, pH 7.9, total dissolved solids 91.6mg / L.

[0031] Put 400ppm of the above-mentioned environment-friendly composite corrosion and scale inhibitor into the above-mentioned water quality, carry out the static non-concentration test for 168 hours, and the scale inhibition rate reaches 100%; the corrosion rate of A3 steel is 0.023mm / a, and the ...

Embodiment 2

[0033] The preparation of the environment-friendly corrosion and scale inhibitor: 18.0% acrylic acid-acrylate copolymer, 4.0% sodium molybdate, 15.0% α-mercaptolauric acid, 25.0% sodium tetraborate, 0.8% methylbenzotri Add azole tyrosine and 45.2% deionized water into the container, stir and heat to 50°C, and continue to stir until completely dissolved to obtain the environment-friendly composite corrosion and scale inhibitor of the present invention.

[0034] Experiments were carried out under the following water quality conditions: Ca 2+ 11.08mg / L, Mg 2+ 2.42mg / L, Cl - 17.13mg / L, SO 4 2- 15.70mg / L, total alkalinity 86.88mg / L, conductivity 310μs / cm, pH 8.55, total dissolved solids 236mg / L.

[0035] Put 500ppm of the above-mentioned composite scale and corrosion inhibitor into the above-mentioned water quality, and keep static non-concentration for 168 hours, and the scale-inhibiting rate is 99.99%. Rotary coupon test: A 3 Steel corrosion rate 0.057mm / a, H68 copper corrosi...

Embodiment 3

[0037] The preparation of the environment-friendly corrosion and scale inhibitor:

[0038] 10.0% sulfonated lignin, 3.5% zinc tungstate, 12.0% dodecanoylpropylenediamine triacetic acid, 20.0% zinc borate, 1.2% benzotriazole, 2.5% tannic acid, Add 50.8% deionized water into the container, stir and heat to 50°C, and continue to stir until completely dissolved to obtain the environment-friendly composite corrosion and scale inhibitor of the present invention.

[0039] Experiments were carried out under the following water quality conditions: Ca 2+ 3.25mg / L, Mg 2+ 0.28mg / L, Cl - 22.51mg / L, SO 4 2- 20.01mg / L, total alkalinity 105.66mg / L, conductivity 276μs / cm, total dissolved solids 184.49mg / L.

[0040] Put 500ppm of the above-mentioned composite scale and corrosion inhibitor into the above-mentioned water quality, and keep static non-concentration for 168 hours, and the scale-inhibiting rate is 100%. Rotary coupon test: A 3 Steel corrosion rate 0.077mm / a, H68 copper corrosi...

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PUM

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Abstract

The invention discloses an environmental-protective composite inhibiting antisludging agent, which comprises the following parts: inhibiting component, antisludging component and deionized water, wherein the inhibiting component is composed of one or more materials in the molybdate, tungstate, borate, organic substituted carboxylic acid or organic heterocyclic compound; the inhibiting component contains one or more materials in the natural macromolecular compound, epoxy succinic acid or acroleic acid ternary copolymer.

Description

technical field [0001] The invention relates to a water quality stabilizer for circulating water treatment, in particular to an environment-friendly composite corrosion and scale inhibitor for treating circulating cooling water. Background technique [0002] The biggest problem in the 21st century is the global shortage of water resources, which has attracted great attention from all over the world. At the same time, with the continuous development of my country's economy, the environmental burden is also increasing. The problem of environmental pollution has also become an urgent problem to be solved in our country. In industry, industrial circulating cooling water is a major water user. Whether it is chemical industry, metallurgy, thermal power generation or large central air conditioning, circulating water is used for heat exchange. Therefore, to improve the use efficiency of industrial or civil circulating water, use environmentally friendly chemicals , which is of gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/00
Inventor 王建筑王吉东
Owner BEIJING HANBOYING ELECTRIC POWER TECH
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