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Circulating water treating agent and preparation method thereof

A treatment agent and circulating water technology, applied in water/sludge/sewage treatment, special treatment targets, chemical instruments and methods, etc., can solve the problem of high total phosphorus content, non-compliance with environmental protection policy requirements, and reduce phosphorus content in discharged water, etc. problems, to achieve the effect of excellent scale and corrosion inhibition performance, good fouling deposition rate, and industrial water saving

Active Publication Date: 2015-03-11
CHONGQING WANLILAI CHEM
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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 circulating water treatment agent and its preparation method 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 and does not meet the national standards Environmental protection policy requirements, can not meet the needs of safe and stable operation of industrial circulating cooling water, etc., and at the same time solve the problem of poor scale and corrosion inhibition performance of existing scale and corrosion inhibitors while reducing phosphorus content in discharge water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to parts by weight, weigh 3 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 9 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 25 parts of tetrapolymer, 10 parts of terpolymer, 2 parts of benzotriazole, 1 part of tolyltriazole, 6 parts of zinc chloride, 8 parts of Polyepoxysuccinic acid, 5 parts of sodium salicylate, 5 parts of sodium tungstate, 1 part of ferric chloride, and 70 parts of deionized water are mixed into 1000 kg.

[0020] The above raw materials are mixed in proportion in the reaction kettle for compounding, and the ambient temperature is 23°C.

[0021] 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 corrosion rate of carbon steel coupons is less than 0.0025mm / a, and the adhesion rate is 4.851mg / cm 2 m.

[0022] After a year of ...

Embodiment 2

[0024] According to parts by weight, weigh 2.5 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 7.5 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA), 25 parts of tetrapolymer, 10 parts of terpolymer, 3 parts of benzotriazole, 1.5 parts of tolyltriazole, 5 parts of zinc sulfate, 8 parts of poly Epoxy succinic acid, 5 parts of sodium salicylate, 8 parts of sodium tungstate, 3 parts of ferric chloride, 150 parts of deionized water, made into 1000 kg.

[0025] The above-mentioned raw materials are mixed in proportion in the reaction kettle for compounding, and the ambient temperature is 25°C.

[0026] 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 condenser material is HSn70-1A, the pipeline is carbon steel pipeline, the concentration ratio is 6 times, and the corrosion rate of the carbon steel coupon is less than 0.0022mm...

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Abstract

The invention relates to a circulating water treating agent and a preparation method thereof. The circulating water treating agent is composed of the following raw materials in parts by weight: 10-13 parts of phosphono carboxylic acid, 35-40 parts of polycarboxylic acid, 5-7 parts of zinc salt, 3-5 parts of copper corrosion inhibitor, 5-17 parts of polyepoxysuccinic acid, 3-16 parts of sodium salicylate, 5-8 parts of sodium tungstate, 1-3 parts of iron trichloride and 70-150 parts of deionized water. The raw materials are mixed in a reaction kettle according to the preset proportion to obtain the circulating water treating agent. No three wastes are discharged in the circulating water treating agent production process; the total phosphorus discharge in the circulating water is less than the maximum allowable discharge concentration in national primary standard; and the circulating water treating agent has excellent scale and corrosion inhibition performance.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a circulating water treatment agent and a preparation method thereof. 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. Adding scale and corrosion inhibitors to the circulating cooling water system is the most important treatment method. At present, the scale and corrosion inhibitors produced and applied by most scale and corrosion inhibitor production units and application units have relatively high total phosphorus content. Generally, the total phosphorus content is above 6.8%, resulting in the total phosphorus in industrial circulating cooling water being generally 7-15 mg / L. Although the scale and corrosion inhibitors with high total phosphorus content are non-toxic or low-...

Claims

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Application Information

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IPC IPC(8): C02F5/14C02F5/10C02F5/08C02F5/12
CPCC23F11/08C23F11/173C02F5/145C02F5/105C02F2303/08C02F2303/22
Inventor 查文炜倪文龙蔡国华曹卫
Owner CHONGQING WANLILAI CHEM
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