Green total organic carbon steel scale and corrosion inhibitor for circulating cooling water system

A technology of scale and corrosion inhibitor and circulating cooling water, which is applied in the directions of descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., to achieve the effects of environmental friendliness, convenient use and simple preparation

Inactive Publication Date: 2012-02-15
TIANJIN HEGUANG ELECTRICAL & MECHANICAL EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a green all-organic carbon steel scale and corrosion inhibitor for circulating cooling water systems. The carbon steel scale and corrosion inhibitor is a completely phosphorus-free formula, and the discharged wastewater will not cause environmental pollution Eutrophication pollution, at the same time, there is no danger of phosphoric acid scale formation during use, thus solving the problems existing in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A green all-organic carbon steel scale and corrosion inhibitor for circulating cooling water systems, composed of oxalic acid, tartaric acid, hydrolytically polymerized maleic anhydride, acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid copolymer, Na 2 O 2.5SiO 2 Composition, the mass percent (%) of each component is:

[0039] Oxalic acid 5%

[0040] tartaric acid 18%

[0041] Hydrolyzed Polymerized Maleic Anhydride Acrylic 7%

[0042] Acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer 5%

[0043] Na 2 O 2.5SiO 2 54%

[0044] Concentrations of each component are: oxalic acid=3mg / L, tartaric acid=10mg / L, hydrolysis polymerized maleic anhydride=4ppm, acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer=3mg / L , Na 2O 2.5SiO 2 =30mg / L, and the above components are fully mixed first, and then put into the circulating cooling water system.

[0045] The above scale and corrosion inhibitors are used fo...

Embodiment 2

[0050] A green all-organic carbon steel scale and corrosion inhibitor for circulating cooling water systems, composed of oxalic acid, gluconic acid, hydrolytically polymerized maleic anhydride, acrylic acid / hydroxypropyl acrylate copolymer, Na 2 O 2.5SiO 2 Composition, the mass percent (%) of each component is:

[0051] Oxalic acid 4%

[0052] Gluconic Acid 20%

[0053] Hydrolyzed Polymerized Maleic Anhydride Acrylic 4%

[0054] Acrylic acid / hydroxypropyl acrylate copolymer 3%

[0055] Na 2 O 2.5SiO 2 68%

[0056] The concentration of each component is: oxalic acid=3mg / L, gluconic acid=15mg / L, hydrolysis polymerized maleic anhydride=3mg / L, acrylic acid / hydroxypropyl acrylate copolymer=2.5mg / L, Na 2 O 2.5SiO 2 =50mg / L, and the above components are fully mixed first, and then put into the cooling water system.

[0057] The above scale and corrosion inhibitors are used for corrosion test on carbon steel:

[0058] Configure synthetic water wit...

Embodiment 3

[0062] A green all-organic carbon steel scale and corrosion inhibitor for circulating cooling water systems, composed of oxalic acid, tartaric acid, hydrolytically polymerized maleic anhydride, acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid copolymer, Na 2 O 2.5SiO 2 Composition, the mass percent (%) of each component is:

[0063] Oxalic acid 3%

[0064] Tartaric acid 23%

[0065] Hydrolyzed Polymerized Maleic Anhydride 6%

[0066] Acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer 6%

[0067] Na 2 O 2.5SiO 2 62%

[0068] The concentration of each component is: oxalic acid=2mg / L, tartaric acid=15mg / L, hydrolysis polymerized maleic anhydride=4mg / L, acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer=4mg / L,Na 2 O 2.5SiO 2 =40mg / L, and the above components are fully mixed first, and then put into the cooling water system.

[0069] The above scale and corrosion inhibitors are used for corrosion test on carbo...

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Abstract

The invention discloses a green total organic carbon steel scale and corrosion inhibitor for a circulating cooling water system, which comprises a scale inhibitor and a corrosion inhibitor, wherein the scale inhibitor comprises one or more of hydrolyzed polymaleic anhydride, polyacrylic acid, polymethacrylic acid, acrylic acid / hydroxypropyl acrylate copolymer, acrylic acid / hydroxypropyl acrylate / methyl acrylate terpolymer and acrylic acid / 2-acrylamido-2-methylpropane sulfonic acid copolymer; and the corrosion inhibitor comprises oxalic acid or oxalate, alpha-hydroxycarboxylic acid or salt thereof and silicate. The scale and corrosion inhibitor has excellent scale inhibition and corrosion inhibition performance, and belongs to a completely phosphorus-free metal-free environment-friendly total organic composition. Discharged waste water treated by the composition can not cause eutrophication pollution to the environment.

Description

technical field [0001] The invention belongs to the chemical agent technology, and relates to a chemical agent used in a chemical treatment method of an industrial cooling water system, specifically, a green all-organic carbon steel scale and corrosion inhibitor used in a circulating cooling water system. The calcium hardness of the circulating cooling water is 100-300mg / L, and the alkalinity is 150-400mg / L. Background technique [0002] In the process of industrial production, it is often necessary to cool the process material, and the cooling water used to take away the unnecessary heat in the industrial production process is called cooling water. Because cooling water accounts for a high proportion of industrial water in industrial production, about 80%. The proportion of cooling water in industries such as petrochemical and metallurgy is about 90%, while the proportion of cooling water in the power industry is even as high as 99% of the total water consumption. Therefo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/10
Inventor 王景塨王鹏王袖
Owner TIANJIN HEGUANG ELECTRICAL & MECHANICAL EQUIP CO LTD
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