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Method for preparing micro-phosphor anti-scaling corrosion inhibitor

A technology of scale and corrosion inhibitors and preparation methods, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve the problem of high total phosphorus content and cannot meet the safety requirements of industrial circulating cooling water Stable operation needs, corrosion and other problems, to achieve the effect of saving industrial water

Inactive Publication Date: 2012-02-15
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of micro-phosphorous scale and corrosion inhibitors to solve the problems of scale, corrosion and microorganisms in the treatment of industrial circulating cooling water in the prior art. The content of total phosphorus in the discharged water is relatively high, which does not meet the national Environmental protection policy requirements, unable to meet the needs of safe and stable operation of industrial circulating cooling water, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 10kg of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 350kg of tetrapolymer, 150kg of terpolymer, 10kg of benzotriazole, zinc chloride 10kg, 470kg of deionized water, made into 1000kg.

[0021] The above-mentioned raw materials are mixed in proportion in the reaction kettle for compounding, and the ambient temperature is 20°C.

[0022] After testing, the total phosphorus content of the formula is 0.18% (in PO 4 3- count).

[0023] The volume of circulating cooling water system in a chemical plant is 1000m 3 , the circulation volume is 2500m 3 , The material of the heat exchanger is TP304, and the pipe is carbon steel pipe. The concentration ratio is 5 times, and the microphosphorous scale and corrosion inhibitor of the present invention is added according to the amount of water replenishment 30mg / L, and the theoretical calculation of the total phosphorus content is 0.18%×30×5=0.27mg / L (based on PO 4 3- In terms of P, it is 0.09mg / L, which is far lower...

Embodiment example 2

[0026] Weigh 40kg of 2-hydroxyphosphonoacetic acid (HPAA), 200kg of tetrapolymer, 400kg of terpolymer, 40kg of methylbenzotriazole, 30kg of zinc sulfate heptahydrate, 290kg of deionized water , dubbed into 1000kg.

[0027] After testing, the total phosphorus content of the formula is 0.8% (as PO 4 3- count).

[0028] The above-mentioned raw materials are mixed in proportion in the reaction kettle for compounding, and the ambient temperature is 25°C.

[0029] The installed capacity of a power plant is 300MW×2 units, and the volume of the single-machine circulating cooling water system is 22000m 3 , the circulation volume is 33000m 3 , the material of the condenser is HSn70-1A, the pipeline is a carbon steel pipeline, the concentration ratio is 6 times, and the microphosphorous scale and corrosion inhibitor of the present invention is added according to the amount of water replenishment 10mg / L, and the theoretically calculated total phosphorus content is 0.8%×10 ×6=0.48mg / L...

Embodiment example 3

[0032] Weigh 20kg of 2-hydroxyphosphonoacetic acid (HPAA), 300kg of tetrapolymer, 300kg of terpolymer, 20kg of benzotriazole, 30kg of zinc sulfate heptahydrate, and 330kg of deionized water. into 1000kg.

[0033] The above-mentioned raw materials are mixed in proportion in a reaction kettle for compounding, and the ambient temperature is 30°C.

[0034] After testing, the total phosphorus content of the formula is 0.36% (in PO 4 3- count).

[0035] The installed capacity of a power plant is 600MW×2 units, and the volume of the single-unit circulating cooling water system is 35000m 3 , the circulation volume is 67000m 3 , The material of the condenser is TP317, the material of the oil cooler is HSn70-1AB, and the pipe is carbon steel pipe. The concentration ratio is 6 times, and the microphosphorus scale and corrosion inhibitor 10mg / L of the present invention is added according to the amount of water replenishment, and the theoretically calculated phosphate content is 0.36%...

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Abstract

The invention provides a method for preparing a micro-phosphor anti-scaling corrosion inhibitor, and belongs to the technical field of industrial recycling cooling water treatment. The following raw materials used in the method comprises in parts by weight: 25 to 50 parts of deionized water, 1 to 4 parts of phosphono acid, 50 to 60 parts of polycarboxylic acid, 1 to 3 parts of zinc salt, and 1 to 4 parts of copper corrosion inhibitor. The method comprises a step of mixing the raw materials in a reaction kettle according to a preset proportion to prepare the required micro-phosphor anti-scaling corrosion inhibitor. The corrosion inhibitor is an environmentally-friendly economical product, does not have emission of 'the three wastes' in a production process, guarantees concentration rate of industrial recycling cooling water to be over 5 times, saves massive industrial water, and realizes that the emission of total phosphor in the recycling water is less than the primary-grade standard of the maximum permissible concentration in China, so that the aims of protecting environment and saving energy are achieved.

Description

Technical field [0001] The invention is the field of industrial circulation cooling water treatment technology. Background technique [0002] Industrial circulating cooling water treatment is mainly to solve the problems of scaling, corrosion and microbial hazards in the industrial circulating cooling water system.Incorporating dirt -resistant corrosion agent to the circulating cooling water system is the most important way. At present, the total phosphorus content of the total phosphorus content produced and applications produced and applied by most dirt -resistant corrosion agents is relatively high.Generally, the total phosphorus content is above 6.8%, resulting in the total phosphorus in industrial circulating cooling water is generally 7-15 mg / L. Although the total phosphorus content with a high total phosphorus content is a non -toxic or low -toxic water treatment agent, it is a non -toxic or low toxic water treatment agent, butThey will cause environmental problems such as...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/14C23F11/18C23F11/167
Inventor 张福新刘文峰胡新霞王金明刘晓民柴斌张雷毕光照
Owner SHANDONG TIANQING TECH DEV
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