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Use of phosphorus containing organic waste liquid in scale resistance and slow etching agent

A technology of scale and corrosion inhibitor and organic waste liquid, which is applied in the directions of scale removal and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc., which can solve the problem of high treatment cost, high price and poor effect and other problems, to achieve the effect of simple extraction method and cost reduction

Inactive Publication Date: 2005-10-19
黄戊生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The characteristic of the above-mentioned organic phosphonic acid scale inhibitor is that it is not easily hydrolyzed, and has a good effect on inhibiting the precipitation or precipitation of calcium carbonate, hydrated iron oxide or calcium sulfate. When used alone, the concentration is usually 16-20mg / L. The price is too high, about 7000-8000 yuan / ton
[0021] For a long time, phosphorus-containing organic waste liquid produced by the chemical industry (such as chemical fertilizers, pesticides, etc.) has been discharged into the environment as pollutants. Regarding the treatment of phosphorus-containing organic waste liquid, people have come up with many methods, but the treatment cost is relatively high. The effect has not been very good, so the treatment technology of phosphorus-containing organic waste liquid is still a problem that plagues the industry

Method used

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  • Use of phosphorus containing organic waste liquid in scale resistance and slow etching agent
  • Use of phosphorus containing organic waste liquid in scale resistance and slow etching agent
  • Use of phosphorus containing organic waste liquid in scale resistance and slow etching agent

Examples

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Effect test

Embodiment 1

[0047] In terms of weight ratio, phosphorus-containing compound: polyacrylic acid: benzotriazole = 80:15:5, and the three are evenly mixed to obtain a scale and corrosion inhibitor, which is used for circulating cooling water in refineries, power plants, fertilizer plants, etc. Scale and corrosion inhibition, the addition amount is 2-50 mg / l, and the scale inhibition rate reaches over 95%.

Embodiment 2

[0049] In terms of weight ratio, phosphorus-containing compound: polyacrylic acid: benzotriazole = 50:40:10, and the three are evenly mixed to obtain a scale and corrosion inhibitor, which is used for circulating cooling water in refineries, power plants, fertilizer plants, etc. Scale and corrosion inhibition, the addition amount is 2-50mg / l, and the scale inhibition rate reaches over 95%.

Embodiment 3

[0051] In terms of weight ratio, phosphorus-containing compound: polyacrylic acid: benzotriazole = 60:32:8, the three are uniformly mixed to obtain a scale and corrosion inhibitor, which is used for circulating cooling water in refineries, power plants, fertilizer plants, etc. Scale and corrosion inhibition, the addition amount is 2-50mg / l, and the scale inhibition rate reaches over 95%.

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Abstract

The present invention relates to circular cooling water treating technology, and is especially the application of phosphorus containing waste liquid in scale and corrosion inhibitor. The waste liquid is first pre-treated to separate phosphorus containing compound to be used as the effective component of scale and corrosion inhibitor; and the phosphorus containing compound is then mixed with dispersant and corrosion retardant in the weight ratio of 50-80 to 15-40 to 5-40 to form the scale and corrosion inhibitor product. The scale and corrosion inhibitor product is used for circular cooling water in oil refinery, power plant, chemical fertilizer plant, etc. and has the added amount of 2-50 mg / L. The present invention provides cheap scale and corrosion inhibitor product while eliminating the pollution of phosphorus containing waste liquid.

Description

technical field [0001] The invention relates to a circulating cooling water treatment technology, in particular to the application of a phosphorus-containing organic waste liquid to a scale and corrosion inhibitor. Background technique [0002] In water treatment, commonly used scale inhibitors include polyphosphate, organic phosphonic acid, phosphonic acid, organic phosphonate, polycarboxylic acid, etc. [0003] 1. Polyphosphate [0004] Commonly used polyphosphates include sodium tripolyphosphate and sodium hexametaphosphate. Long-chain anions are formed in water and are easily adsorbed on tiny calcium carbonate crystals. At the same time, this anion is easy to interact with CO 3 2- Replacement, thereby preventing the precipitation of calcium carbonate, polyphosphate is non-toxic, but easy to hydrolyze, after hydrolysis and calcium ions in water to form calcium phosphate scale, easy to promote algae growth, and corrode copper and copper alloys. [0005] 2. Organic phosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 黄戊生
Owner 黄戊生
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