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Composite water treatment agent of closed type circulating water system

A water treatment agent, closed-loop technology, used in water/sludge/sewage treatment, descaling and water softening, chemical instruments and methods, etc. Among them, certain types of supplementary water, use restrictions and other issues can achieve the effect of good protection, good environmental performance and excellent performance

Inactive Publication Date: 2012-07-11
SHANGHAI EMPEROR OF CLEANING HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that the composite water treatment agent of the closed circulating cooling water system in the prior art is still within the scope of phosphorus formula, which is not friendly to the environment, and the treatment object is only suitable for closed circulating cooling water A certain type of make-up water in the system is greatly restricted in use, etc. It provides a good corrosion and scale inhibition performance and environmental protection performance. It can be applied to systems with demineralized water and tap water as make-up water. It is free of phosphorus, Composite water treatment agent for closed circulation water system that is non-toxic, biodegradable, and suitable for both carbon steel and copper systems

Method used

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  • Composite water treatment agent of closed type circulating water system
  • Composite water treatment agent of closed type circulating water system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Closed circulation water system composite water treatment agent composition: polyaspartic acid 28%, sodium gluconate 11%, sodium molybdate 7%, zinc sulfate 5.5%, lanthanum nitrate 3.5%, benzotriazole 1.5%, de Ionized water 43.5%.

[0039] The dosage concentration of the compound water treatment agent in the closed circulation water system is 60mg / L.

[0040] According to the test results of water quality I, the corrosion rate of carbon steel coupons is 0.026mm / a, and the corrosion rate of copper coupons is 0.0015mm / a.

[0041] According to the water quality II test results, the corrosion rate of carbon steel coupons is 0.021mm / a, and the corrosion rate of copper coupons is 0.0013mm / a; the scale inhibition rate of calcium carbonate is 99.2%.

Embodiment 2

[0043] Closed circulation water system composite water treatment agent composition: polyaspartic acid 15%, acrylic acid / hydroxyethyl methacrylate / methyl acrylate copolymer 13%, calcium gluconate 15%, sodium molybdate 4%, zinc sulfate 3%, zinc chloride 2%, praseodymium nitrate 2%, benzotriazole 1%, deionized water 45%.

[0044] The concentration of compound water treatment agent in the closed circulation water system is 70mg / L.

[0045] According to the test results of water quality I, the corrosion rate of carbon steel coupons is 0.018mm / a, and the corrosion rate of copper coupons is 0.0011mm / a.

[0046] According to the water quality II test results, the corrosion rate of carbon steel coupons is 0.016mm / a, and the corrosion rate of copper coupons is 0.0009mm / a; the scale inhibition rate of calcium carbonate is 99.4%.

Embodiment 3

[0048] Closed circulation water system composite water treatment agent composition: polyepoxysuccinic acid 21.5%, sodium gluconate 15%, ammonium molybdate 7%, zinc chloride 5.5%, cerium nitrate 3.5%, methyl benzotriazole 2 %, deionized water 45.5%.

[0049] The concentration of compound water treatment agent in the closed circulation water system is 70mg / L.

[0050] According to the test results of water quality I, the corrosion rate of carbon steel coupons is 0.011mm / a, and the corrosion rate of copper coupons is 0.0008mm / a.

[0051] According to the water quality II test results, the corrosion rate of carbon steel coupons is 0.009mm / a, and the corrosion rate of copper coupons is 0.00082mm / a; the scale inhibition rate of calcium carbonate is 99.5%.

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Abstract

The invention discloses a composite water treatment agent of a closed type circulating water system. The formula of the composite water treatment agent comprises carboxylic polymer, gluconate, molybdate, zinc salt, rare-earth element nitrate, azoles corrosion inhibitor and water. The composite water treatment agent of the closed type circulating water system has good corrosion and scale inhibition performance and environmental protection performance, is suitable for systems taking the softened water and tap water as make-up water, is phosphorus-free and nontoxic, is easy for biological degradation, and is also suitable for carbon steel and copper material systems.

Description

technical field [0001] The invention relates to a compound water treatment agent for a closed circulation water system. Background technique [0002] With the rapid development of the national economy and the improvement of people's living standards, the water consumption is increasing, and the contradiction between the shortage of water resources and the increase of water consumption is becoming more and more prominent. In order to save water, recycling water has become an inevitable choice. In industry, the water volume of cooling water is the largest, accounting for about 70% of the total industrial water consumption, and circulating cooling water systems are widely used. The circulating cooling water system is divided into open type and closed type. The open circulating cooling water system is relatively common, and the technology of water treatment is becoming more and more mature. The closed circulating cooling water system is generally used in situations with high ...

Claims

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Application Information

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IPC IPC(8): C02F5/10C02F5/12
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH
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