Preparation method of tracing type phosphorus-free corrosion and scale inhibitor

A technology of phosphorus-free corrosion and scale inhibitors, which is applied in the field of industrial water treatment, can solve the problems of non-phosphorus water treatment agents, such as undetectable detection, difficulty, and reduced dosage, so as to achieve a wide range of water quality, less heavy metal pollution, and economical use volume effect

Active Publication Date: 2014-09-17
CNOOC TIANJIN CHEM RES & DESIGN INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a tracer type non-phosphorus corrosion and scale inhibitor for industrial circulating cooling water system, which combines cathode and anode corrosion inhibitors, adsorption type and deposition type corrosion inhibitors, through each component The synergistic effect between them reduces the amount of each component, and through the use of tracer-type scale inhibitors and dispersants, it solves the problem that the non-phosphorus water treatment agent cannot be detected or is difficult to detect, and ensures the accuracy of the non-phosphorus water treatment agent. It avoids the threshold effect between some components, realizes the precise dosing of phosphorus-free water treatment agent in the circulating cooling water system, and ensures a good water treatment effect.

Method used

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  • Preparation method of tracing type phosphorus-free corrosion and scale inhibitor
  • Preparation method of tracing type phosphorus-free corrosion and scale inhibitor
  • Preparation method of tracing type phosphorus-free corrosion and scale inhibitor

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Prepare 100g tracer-type phosphorus-free corrosion and scale inhibitor solution: add 8g of sodium gluconate and 1.3g of zinc chloride to 58.4g of water, stir well, then add 20g of polyepoxysuccinic acid, 7g of tracer-type scale inhibitor and dispersant 1. Stir 5 g of water-soluble imidazoline evenly, finally add 0.3 g of benzotriazole, stir until fully dissolved, and filter to obtain.

[0032] 100g of the prepared tracer non-phosphorus corrosion and scale inhibitor solution was added to the industrial water to be treated according to the concentration of 300mg / L.

[0033] The raw water quality of the above-mentioned industrial water: total hardness 221.84mg / L, ammonia nitrogen 0mg / L, calcium hardness 128.93mg / L, total alkalinity 72mg / L, Cl - 48.35mg / L, SO 4 2- 21.2mg / L, pH value 8.02, COD5.4mg / L, turbidity 4.8NTU, conductance 431us / cm, total iron 0.31mg / L.

[0034] Applied to the circulating cooling water system of metallurgical enterprises, the concentration rate is...

Embodiment 2

[0036] Prepare 100g of tracer-type non-phosphorus corrosion and scale inhibitor solution: add 7g of sodium benzoate and 0.8g of zinc chloride to 58.4g of water, stir well, then add 20g of polyepoxysuccinic acid, 7g of tracer-type scale and dispersant, Stir 7g of water-soluble imidazoline evenly, finally add 0.3g of benzotriazole and stir until fully dissolved, then filter to obtain.

[0037] 100 g of the prepared tracer non-phosphorus corrosion and scale inhibitor solution was added to the industrial water to be treated at a concentration of 150 mg / L.

[0038] The raw water quality of the above industrial water: total hardness 437.96mg / L, ammonia nitrogen 0mg / L, calcium hardness 264.1mg / L, total alkalinity 217.3mg / L, Cl - 37.32mg / L, SO 4 2- 62.28mg / L, pH value 7.60, COD6.4mg / L, turbidity 0.8NTU, conductance 1080us / cm, total iron 0.08mg / L.

[0039] Applied to the circulating cooling water system of chemical enterprises, the concentration rate is 5.0, the system fluorescence ...

Embodiment 3

[0041] Prepare 100g tracer-type phosphorus-free corrosion and scale inhibitor solution: add 8g of sodium gluconate and 1.3g of zinc chloride to 61.5g of water, stir well, then add 20g of polyepoxysuccinic acid, 4g of tracer-type scale inhibitor and dispersant 1. Stir 5g of water-soluble imidazoline evenly, finally add 0.2g of mercaptobenzoxazole and stir until fully dissolved, then filter to obtain.

[0042] 100 g of the prepared tracer non-phosphorus corrosion and scale inhibitor solution was added to the industrial water to be treated at a concentration of 400 mg / L.

[0043] Raw water quality of the above-mentioned industrial water: total hardness 64.81mg / L, ammonia nitrogen 0mg / L, calcium hardness 7.03mg / L, total alkalinity 14.2mg / L, Cl - 172.3mg / L, SO 4 2-2.46mg / L, pH value 7.31, COD1.4mg / L, turbidity 2.4NTU, conductance 451us / cm, total iron 0.03mg / L.

[0044] Applied to the circulating cooling water system of petrochemical enterprises, the concentration rate is 5.0, th...

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Abstract

The invention relates to a preparation method of a tracing type phosphorus-free corrosion and scale inhibitor. The preparation method is characterized in that the tracing type phosphorus-free corrosion and scale inhibitor comprises polyepoxysuccinic acid, a tracing type dirt dispersion agent, organic carboxylic acid sodium salt, a zinc salt, imidazolines, azoles and water, and is prepared by stirring, mixing and filtering the components. The tracing type phosphorus-free corrosion and scale inhibitor disclosed by the invention has the advantages of corrosion inhibition synergistic effect, low dosage, good stability, wide application scope and environment friendliness, and particularly due to the introduction of the tracing type dirt dispersion agent, an obvious synergistic effect is achieved, and the on-line detection on the medicament content is realized by detecting the fluorescence value, so that the problem that a general phosphorus-free medicament can not be detected or is difficult to detect can be solved.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a preparation method of a tracer type non-phosphorus corrosion and scale inhibitor. It is a phosphorus-free, nitrogen-free, biodegradable corrosion and scale inhibitor suitable for industrial circulating cooling water systems, and capable of on-line monitoring and automatic dosing. Background technique [0002] During the recycling process of industrial cooling water, there will be different degrees of inorganic salt deposition, corrosion, bacteria and algae growth and other problems, resulting in serious consequences such as reduced efficiency of heat exchange equipment, blockage, corrosion and perforation, and bring great hidden dangers to industrial production. . The use of appropriate corrosion and scale inhibitors and supporting water treatment agents can reduce the adverse effects caused by corrosion, scaling, and bacterial growth of metal materials in e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/08C23F11/173
Inventor 吴新国王乃琳姜宝安马景辉刘佳节顿士超潘冠英
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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