Phosphorus-free descaling corrosion inhibitor

A corrosion inhibitor, phosphorus-free scale inhibition technology, applied in the direction of scale removal and water softening, complex/solubilizer treatment, special treatment targets, etc., can solve problems such as equipment corrosion operation difficulties, and achieve improved scale inhibition and anticorrosion performance , Save equipment investment and protect the effect of safe operation

Inactive Publication Date: 2015-05-20
QINGDAO WATER WORLD ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common feature of these composite scale and corrosion inhibitors is that the concentration ratio of circulating water generally does not exceed 4. If the concentration ratio is to be further increased, the method of adding acid is required. The resulting equipment corrosion and operational difficulties are not easy to solve.

Method used

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  • Phosphorus-free descaling corrosion inhibitor
  • Phosphorus-free descaling corrosion inhibitor
  • Phosphorus-free descaling corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015]

[0016] Appropriate amount of deionized water.

[0017] The preparation method of the phosphorus-free descaling and corrosion inhibitor is to uniformly mix polymaleic anhydride, benzotriazole, zinc nitrate, polyacrylic acid, polyoxysuccinic acid, sodium gluconate and deionized water to obtain the product.

[0018] The invention combines biochemical technology and surface technology with traditional water quality stabilization technology to effectively improve the scale inhibition and anticorrosion performance of the metal interface of the heat exchanger, especially for industries with high hardness, high alkalinity and easy structure of water quality in northern my country It breaks through the limitations of traditional water quality stabilization technology in increasing the concentration multiple, and creatively solves the scale inhibition problem of super-concentrated circulating water treatment. Yes, circulating cooling water can operate under super-concentrated ...

Embodiment 2

[0020]

[0021] Appropriate amount of deionized water.

[0022] The preparation method is the same as in Example 1.

[0023] The invention does not need to add acid treatment, and adopts natural pH value operation, which not only saves equipment investment, simplifies the operation procedure, but also helps to improve the life of the equipment, protect the safe operation of the system, and avoid the corrosion of equipment and system leakage caused by traditional acid treatment. and other hidden dangers

Embodiment 3

[0025]

[0026] Appropriate amount of deionized water.

[0027] The preparation method is the same as in Example 1.

[0028] It is not easy to form calcium phosphate scale during use, and the phosphorus content in the discharged water is far lower than the national standard, which is an environmentally friendly water treatment agent.

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Abstract

The invention discloses a phosphorus-free descaling corrosion inhibitor and a preparation method. The phosphorus-free descaling corrosion inhibitor is composed of polymaleic anhydride, benzotriazol, zinc nitrate, polyacrylic acid, polyoxy succinate, sodium gluconate and deionized water. According to the invention, calcium phosphate scale can not be easily formed during a usage process of the product, phosphor content in discharge water is far lower than a national standard, and the phosphorus-free descaling corrosion inhibitor belongs to the environment friendly water treatment agent. The phosphorus-free descaling corrosion inhibitor has good corrosion inhibition effect, has obvious corrosion inhibition effect to the ferrous metal, has slight corrosion effect to non ferrous metal such as copper, and zinc salt or chromium salt can be added for improvement. Polymaleic anhydride is nontoxic and biodegradable, and can not generate severe pollution to environment.

Description

technical field [0001] The invention relates to a phosphorus-free descaling and corrosion inhibitor for industrial circulating water, a preparation method and application thereof. In particular, it relates to a phosphorus-free descaling and corrosion inhibitor for circulating cooling water treatment. Background technique [0002] In recent years, with the rapid growth of the national economy, many basic industries have also achieved considerable development, such as energy, steel, oil refining, large chemical industry, etc., which has led to a significant increase in industrial water consumption year by year, of which cooling water accounts for a large proportion , some departments even as high as 90%. Therefore, how to make use of high technology, give full play to the advantages of scientific research, effectively and rationally save water and protect water resources from pollution is one of the urgent issues to be solved in the rapid economic development. [0003] Enter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/10C02F5/12
CPCC02F5/105C02F5/125C02F2303/08C02F2303/22
Inventor 朱洪学邵星红
Owner QINGDAO WATER WORLD ENVIRONMENTAL PROTECTION TECH
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