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Scale and corrosion inhibitor

A scale and corrosion inhibitor, scale and corrosion inhibition technology, applied in scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of large dosage, inaccurate dosage, etc. problems, to achieve the effect of easy compounding, good stability and low phosphorus content

Inactive Publication Date: 2013-09-25
常州市排水管理处 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The Chinese invention patent application document with the application number of 200410073665 discloses the components and application ratio of a low-phosphorus corrosion and scale inhibitor. The dosage is large, no fluorescent tracer is added, and the dosage cannot be accurately added.

Method used

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  • Scale and corrosion inhibitor
  • Scale and corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 5kg of zinc sulfate; 20kg of polyaspartic acid; 5kg of sodium molybdate; 10kg of acrylic acid-aminotrimethylene phosphonic acid-acrylic acid terpolymer; 2kg of hydrolyzed polymaleic anhydride; 0.5kg of methylbenzotriazole 0.2 kg of carboxyl sulfonaphthalimide; the number of the finished scale and corrosion inhibitor prepared by the above-mentioned preparation method is CP-1.

Embodiment 2

[0040] Weigh 5kg of zinc sulfate; 20kg of polyepoxysuccinic acid; 5kg of sodium molybdate; 10kg of acrylic acid-aminotrimethylene phosphonic acid-acrylic acid terpolymer; 2kg of hydrolyzed polymaleic anhydride; 0.5kg of methylbenzotriazole 0.2 kg of carboxyl sulfonaphthalimide; the number of the finished scale and corrosion inhibitor prepared by the above-mentioned preparation method is CP-2.

Embodiment 3

[0042] Weigh 8kg of 2-butane-phosphonic acid-1,2,4-triphosphonic acid; 5kg of zinc sulfate; 10kg of polyaspartic acid; 2.5kg of sodium molybdate; 2-hydroxyphosphonoacetic acid 2kg; hydrolyzed polymaleic anhydride 2kg; tolyl benzotriazole 0.5kg; The etchant number is CP-3.

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Abstract

The invention relates to a scale and corrosion inhibitor, comprising organic phosphonate, an inorganic scale and corrosion inhibition component, a carboxylic acid containing copolymer, zinc salt, a heterocyclic compound and a fluorescence tracing component. The scale and corrosion inhibitor is easy to compound, has good stability, and has good scale and corrosion inhibition performances for reusing tail water of a sewage plant into a circulating cooling system under a low addition amount; the scale and corrosion inhibitor can be directly added into a reclaimed water reusing pipeline, without needing to supplement calcium and alkali into the tail water in advance and regulating a pH value, and has a good treating effect; the scale and corrosion inhibitor does not contain a toxic compound and inorganic phosphatic, contains little phosphor, can reduce eutrophication pollution of a water body, and is in favor of environment protection.

Description

technical field [0001] The invention relates to a water treatment agent, in particular to a fluorescent tracer scale and corrosion inhibitor for treating tail water of a sewage plant and recycling it to a circulating cooling system. Background technique [0002] The amount of cooling water in the industry is large, generally accounting for 80% of the total water consumption. The method of circulating cooling and increasing the concentration multiple is usually used to save water. However, in the process of circulating cooling, due to the increase of water temperature and evaporation of water, various The concentration of inorganic ions and organic substances will naturally increase the alkalinity, hardness and pH value of the water, causing problems such as inorganic salt precipitation, corrosion and bacteria and algae growth in water supply pipes and water equipment to varying degrees, resulting in a decrease in the efficiency of heat exchange equipment and Serious conseque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
CPCC23F11/08C23F14/02
Inventor 许光明陈俊吕贞陈波何恭哲施亚栋张飞雁朱迪管运涛贺凯
Owner 常州市排水管理处
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