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Environment-friendly and low-phosphorous circulating water scale and corrosion inhibitor applied to urban recycled water used as makeup water

A scale and corrosion inhibitor, urban reclaimed water technology, applied in water/sludge/sewage treatment, natural water treatment, non-polluted water treatment, etc. Low problems, to achieve the effect of saving water resources, small environmental impact, and reducing the amount of sewage

Inactive Publication Date: 2019-01-01
HUADIAN ELECTRIC POWER SCI INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The use of urban reclaimed water as supplementary water for industrial circulating cooling water systems has become an important way to effectively utilize water resources. The concentration rate of the circulating water system where urban reclaimed water is used as replenishment is generally low. In addition, the use of some scale inhibitors with organic phosphine as the main component, such as the Chinese patent application number 200910148632.1, will greatly increase the total phosphorus content in the circulating water sewage , causing pollution to the surrounding water environment, there is a certain environmental risk

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] An environmentally friendly and low-phosphorus circulating water scale and corrosion inhibitor suitable for urban water replenishment, including the following components by weight: 2.0 parts of polyepoxysuccinic acid (PESA), 2-butane-1 phosphonate , 1.6 parts of 2,4-tricarboxylic acid (PBTCA); 2.2 parts of carboxylic acid-sulfonic acid-acrylate terpolymer (AA-AMPS-HPA); 1.5 parts of polycitric acid; 1.0 parts of zinc gluconate; 1.7 parts of water share.

[0014] The density (20°C) of the above-mentioned environmentally friendly and low-phosphorus circulating water scale and corrosion inhibitors suitable for urban reclaimed water is greater than 1.15g / cm 3 , the solid content is greater than 32%, the pH of 1% aqueous solution is between 3.0±1.5, and the phosphonate content is between 2.0-6.8%. It is suitable for urban reclaimed water with water hardness less than 15mmol / L and alkalinity less than 8mol / L It is used as a scale and corrosion inhibitor for the circulating w...

Embodiment 2

[0016] An environmentally friendly and low-phosphorus circulating water scale and corrosion inhibitor suitable for urban water replenishment, including the following components in parts by weight: 2.3 parts of polyepoxysuccinic acid (PESA), 2-butane-1 phosphonate , 1.8 parts of 2,4-tricarboxylic acid (PBTCA); 2.5 parts of carboxylic acid-sulfonic acid-acrylate terpolymer (AA-AMPS-HPA); 1.7 parts of polycitric acid; 1.2 parts of zinc gluconate; 0.5 parts of water share.

[0017] The density (20°C) of the above-mentioned environmentally friendly and low-phosphorus circulating water scale and corrosion inhibitors suitable for urban reclaimed water is greater than 1.15g / cm 3 , the solid content is greater than 32%, the pH of 1% aqueous solution is between 3.0±1.5, and the phosphonate content is between 2.0-6.8%. It is suitable for urban reclaimed water with water hardness less than 15mmol / L and alkalinity less than 8mol / L It is used as a scale and corrosion inhibitor for the circ...

Embodiment 3

[0019] An environmentally friendly and low-phosphorus circulating water scale and corrosion inhibitor suitable for using urban reclaimed water as supplementary water, including the following components in parts by weight: 2.2 parts of polyepoxysuccinic acid (PESA), 2-butane-1 phosphonate , 1.7 parts of 2,4-tricarboxylic acid (PBTCA); 2.3 parts of carboxylic acid-sulfonic acid-acrylate terpolymer (AA-AMPS-HPA); 1.6 parts of polycitric acid; 1.1 parts of zinc gluconate; 1.1 parts of water share.

[0020] The density (20°C) of the above-mentioned environmentally friendly and low-phosphorus circulating water scale and corrosion inhibitors suitable for urban reclaimed water is greater than 1.15g / cm 3 , the solid content is greater than 32%, the pH of 1% aqueous solution is between 3.0±1.5, and the phosphonate content is between 2.0-6.8%. It is suitable for urban reclaimed water with water hardness less than 15mmol / L and alkalinity less than 8mol / L It is used as a scale and corrosi...

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Abstract

The invention relates to an environment-friendly and low-phosphorous circulating water scale and corrosion inhibitor applied to urban recycled water used as makeup water. At present, use of a scale inhibitor with organic phosphine as a main ingredient greatly increases the total phosphorous content of blowdown water of circulating water and pollutes an ambient water environment. The circulating water scale and corrosion inhibitor is prepared from the following components in parts by weight: 2.0 to 2.3 parts of polyepoxysuccinic acid, 1.6 to 1.8 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid, 2.2 to 2.5 parts of a carboxylic-sulfonate-acrylate terpolymer, 1.5 to 1.7 parts of poly-citric acid, 1.0 to 1.2 parts of zinc gluconate and 0.5 to 1.7 parts of water. The circulating water scaleand corrosion inhibitor is an environment-friendly and low-phosphorus formula, and is safe, reliable, convenient to prepare and applicable to the industries of electric power, metallurgy, chemical engineering, medicine, petroleum and the like, the circulating water concentration ratio when the urban recycled water is used as the makeup water can be increased, system blowdown and the running cost can be reduced, and environmental pollutions can be alleviated.

Description

technical field [0001] The invention relates to an environment-friendly, low-phosphorus circulating water scale and corrosion inhibitor suitable for using urban reclaimed water as replenishment water, and belongs to the technical field of scale and corrosion inhibition for industrial circulating cooling water. Background technique [0002] Water is a precious natural resource that human beings depend on for survival, and the shortage of water resources has become a worldwide hot topic. my country's per capita water resources are about 1 / 4 of the world's per capita share, and after ranking in the top 100, it is one of the countries with the poorest per capita water resources in the world. Therefore, it is of great significance to save water and rationally use water in our country. In local water-scarce areas, water has become an important factor restricting the development of industry and agriculture and threatening safe production. More than 50% of industrial water is used...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F103/02
CPCC02F5/145C02F2103/023C02F2303/08C02F2303/22
Inventor 王仁雷衡世权朱跃晋银佳江建平
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD