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Corrosion inhibitor for closed soft water circulating cooling water system and application

A technology of cooling water system and corrosion inhibitor, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc. Excellent corrosion performance, efficient corrosion inhibition performance and obvious technical advantages

Active Publication Date: 2017-09-15
北京拓凯化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although soft water removes most of the hardness to greatly reduce the scaling of water, it is still highly corrosive. For this reason, it is necessary to add corrosion inhibitors to the cooling water

Method used

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  • Corrosion inhibitor for closed soft water circulating cooling water system and application
  • Corrosion inhibitor for closed soft water circulating cooling water system and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The production process of the corrosion inhibitor of the present invention is introduced as follows:

[0025] 1.1 Preparation: According to the formula ratio, quantitatively weigh 5-50 parts of triethanolamine borate, 5-50 parts of ascorbic acid, 5-50 parts of urotropine, 1-10 parts of benzotriazole, 1-10 parts of sodium hydroxide Parts, 10-80 parts of water.

[0026] 1.2 Production: Add water to the reaction kettle, start stirring, add triethanolamine borate, ascorbic acid, urotropine, benzotriazole, sodium hydroxide, water, dissolve, continue to stir for about 20 minutes, and mix well Divide it to obtain the preparation of the present invention.

Embodiment 2

[0028] The production process of the corrosion inhibitor of the present invention is introduced as follows:

[0029] 2.1 Preparation: According to the formula ratio, quantitatively weigh 5-50 parts of triethanolamine borate, 5-50 parts of ascorbic acid, 5-50 parts of urotropine, 1-10 parts of benzotriazole, 1-10 parts of sodium hydroxide Parts, 10-80 parts of water.

[0030] 2.2 Production: Add water to the reaction kettle, start stirring, add triethanolamine borate, benzotriazole, and sodium hydroxide, continue to stir after dissolution for about 20 minutes, mix and pack into preparation A; add ascorbic acid , Urotropine, and water are added to the reaction kettle, stirred and dissolved, and then continue to stir for about 20 minutes. After mixing, they are divided into preparation B; the composition preparation of the present invention is obtained.

Embodiment 3

[0032] The invention is used as a corrosion inhibitor for the closed soft water circulating cooling water of a blast furnace, and a corrosion inhibitor performance test is carried out for a certain water quality.

[0033] 3.1 Test conditions

[0034] Test water quality: test water is a blast furnace replenishing water in Hebei area; water quality stabilizer: the invention, used in the corrosion inhibitor of the closed soft water circulating cooling water system of blast furnace, the added amount is the preparation 200mg / L commercial concentration; test water temperature: 50± 1℃; linear speed of test piece: 75r / min; distance between upper end of test piece and test liquid surface: more than 2cm; size and surface area of ​​test piece: 50×25×2mm, 28cm 2 ; Test time: 120 hours; Number of test slices: three in each cup; Test slice material: A3 carbon steel, stainless steel, copper.

[0035] 3.2 Test method

[0036] Refer to the "Determination of Water Treatment Agent Corrosion Inhibition P...

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Abstract

The invention discloses a corrosion inhibitor for a closed soft water circulating cooling water system and an application. Anti-corrosion protection is carried out on thermal equipment, so that the service life of system equipment in a closed soft water circulating cooling water environment is effectively prolonged. The corrosion inhibitor has the characteristics of being efficient, phosphorus-free and environment-friendly. The corrosion inhibitor is characterized by comprising a steel corrosion inhibitor and a copper corrosion inhibitor, wherein the steel corrosion inhibitor comprises triethanolamine borate, ascorbic acid and urotropine; and the copper corrosion inhibitor comprises benzotriazole.

Description

Technical field [0001] The present invention relates to industrial water treatment technology, for example, water treatment technology appropriately adopted for circulating cooling water of heat exchange equipment such as blast furnaces, hot blast stoves, etc., especially a corrosion inhibitor and method for closed soft water circulating cooling water systems And application to protect the thermal equipment against corrosion, thereby effectively extending the service life of the system equipment in the closed soft water circulating cooling water environment. The corrosion inhibitor of the present invention has the characteristics of high efficiency, phosphorus-free and environmental protection. Background technique [0002] Today, the world is facing crises such as population growth, deterioration of the ecological environment, and water shortages. The scarcity and pollution of water resources pose a threat to social stability and economic development. It has become one of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C23F11/10
CPCC02F5/125C23F11/10
Inventor 史玉刘雪冬赵士学宋焕明
Owner 北京拓凯化工技术有限公司
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