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High-effective composite corrosion and scale inhibitor being suitable for high-calcium and -alkali water and preparation method thereof

A technology of corrosion and scale inhibitor, copper corrosion inhibitor, applied in chemical instruments and methods, complex/solubilizer treatment, scale removal and water softening, etc., can solve the problem of unsatisfactory zinc stabilization effect and poor scale inhibition effect , poor corrosion inhibition effect, etc., to achieve excellent corrosion and scale inhibition performance, environmental protection, and easy compounding.

Inactive Publication Date: 2015-12-09
鞍钢栗田(鞍山)水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The all-organophosphorus formula has good scale inhibition performance, but the corrosion inhibition effect is poor, and the cost of medication is high
The inorganic formula of zinc salt and phosphate has good corrosion inhibition effect, but poor scale inhibition effect and unsatisfactory zinc stabilization effect, and is not suitable for high temperature water system

Method used

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  • High-effective composite corrosion and scale inhibitor being suitable for high-calcium and -alkali water and preparation method thereof
  • High-effective composite corrosion and scale inhibitor being suitable for high-calcium and -alkali water and preparation method thereof
  • High-effective composite corrosion and scale inhibitor being suitable for high-calcium and -alkali water and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Recipe 1:

[0036] The weight content of each component of the composite slow-release scale inhibitor is:

[0037]

[0038] Experimental raw water quality:

[0039]

[0040] According to the above water quality, carry out the rotating plate test, run for 3 days, the water temperature is 45 ℃, add the experimental raw water to supplement the evaporation water loss, add the compound slow-release scale inhibitor 30mg / L, after the experiment, the concentration ratio of the water quality is about 2.5 times, and it is tested by the experiment The corrosion rate of the carbon steel coupon is 0.0187mm / a, which meets the requirements of the industrial circulating cooling water treatment design specification (GB50050--2007).

[0041] According to the standard of "Determination of Scale Inhibition Performance of Water Treatment Agents--Calcium Carbonate Deposition Method" (GB-T16632-2008), the scale inhibition rate was measured, and the scale inhibition rate was 87%.

Embodiment 2

[0043] Recipe 2:

[0044] The weight content of each component of the composite slow-release scale inhibitor is:

[0045]

[0046]

[0047] Experimental raw water quality:

[0048]

[0049] According to the above water quality, carry out the rotating plate test, run for 5 days, the water temperature is 45 ℃, add the experimental raw water to supplement the evaporation water loss, add the compound slow-release scale inhibitor 30mg / L, after the experiment, the concentration ratio of the water quality is about 4 times, and it is tested by the experiment The corrosion rate of the carbon steel coupon is 0.0235mm / a, which meets the requirements of the industrial circulating cooling water treatment design specification (GB50050--2007).

[0050] According to the standard of "Determination of Scale Inhibition Performance of Water Treatment Agents--Calcium Carbonate Deposition Method" (GB-T16632-2008), the scale inhibition rate was measured, and the scale inhibition rate was 9...

Embodiment 3

[0052] Recipe 3:

[0053] The weight content of each component of the composite slow-release scale inhibitor is:

[0054]

[0055] Experimental raw water quality:

[0056]

[0057] According to the above water quality, the rotating plate test was carried out. After 7 days of operation, the water temperature was 45°C. The experimental raw water was added to supplement the evaporation water loss, and the compound slow-release scale inhibitor was added at 30mg / L. After the experiment, the water concentration was about 5.5 times. The corrosion rate of the carbon steel coupon is 0.0287mm / a, which meets the requirements of the industrial circulating cooling water treatment design specification (GB50050--2007).

[0058] According to the standard of "Determination of Scale Inhibition Performance of Water Treatment Agents--Calcium Carbonate Deposition Method" (GB-T16632-2008), the scale inhibition rate was measured, and the scale inhibition rate was 91%.

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Abstract

The invention provides a high-effective composite corrosion and scale inhibitor which includes following components, by mass, 8-18 parts of polyhydric alcohol phosphate ester, 5-15 parts of hydroxyethidene diphosphonic acid, 10-20 parts of phosphor carboxylic acid copolymer, 5-15 parts of zinc sulfate, 0.1-0.5 parts of copper corrosion inhibitor, 10-20 parts of a high-effective dispersing agent, 1-3 parts of a co-solvent and 10-60 water. The corrosion and scale inhibitor is suitable for water quality of high hardness, high alkalinity and strong scaling property and achieves excellent scale and corrosion inhibition performance. The corrosion and scale inhibitor is free of inorganic phosphate so that calcium phosphate scale precipitation is prevented. The corrosion and scale inhibitor is free of toxic substances, such as chromate, so that the corrosion and scale inhibitor is pollution-free and is beneficial to environmental protection. The corrosion and scale inhibitor is low in cost, is easy to compound, is good in stability and is less in use amount. An excellent synergy is achieved among the components, so that the corrosion and scale inhibitor is stable in performance and excellent in performance.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a high-efficiency composite corrosion and scale inhibitor suitable for high-calcium and high-alkaline water and a preparation method thereof. Background technique [0002] The global water resources are increasingly scarce, and rational distribution of water and water conservation have become a top priority. Among them, the large user of industrial water, cooling water, can save nearly 90% of industrial cooling water after repeated use, and further reduce production costs. Therefore, circulating water treatment technology has attracted more and more attention. [0003] The water quality of water sources in different regions varies greatly, resulting in different degrees of corrosion and scaling in the circulating water system. Different water treatment formulas are required for different water sources. In most parts of the north, the calcium hardness of the water quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/08C02F5/14
Inventor 张柏鸿李俊峰王坤鹏王志成
Owner 鞍钢栗田(鞍山)水处理有限公司
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