Scale and corrosion inhibitor using recycled water as circulating cooling water in fired power plant, method and application thereof

A technology of circulating cooling water, scale and corrosion inhibitor, applied in chemical instruments and methods, water/sludge/sewage treatment, descaling and water softening, etc. and other problems, to achieve the effect of excellent corrosion inhibition performance, obvious technical advantages and considerable economic benefits

Active Publication Date: 2010-12-22
北京拓凯化工技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reusing reclaimed water obtained after normal treatment as supplementary water for circulating cooling water, in addition to considering the problems of scaling, corrosion and sterilization of conventional circulating cooling water treatment, there are still the following technical difficulties: First, reclaimed water Contains more organic matter, so the growth of bacteria and algae is more serious than fresh water as supplementary water; secondly, reclaimed water often contains higher inorganic soluble salts, suspended solids, ammonia nitrogen, oil, phosphorus, etc. When the circulating cooling water system is used, the reclaimed water is continuously evaporated and concentrated in the cooling tower. When a certain concentration ratio is reached, the harmful

Method used

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  • Scale and corrosion inhibitor using recycled water as circulating cooling water in fired power plant, method and application thereof
  • Scale and corrosion inhibitor using recycled water as circulating cooling water in fired power plant, method and application thereof
  • Scale and corrosion inhibitor using recycled water as circulating cooling water in fired power plant, method and application thereof

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preparation example Construction

[0029] The above-mentioned preparation method for reclaimed water as the scale and corrosion inhibitor for circulating cooling water in thermal power plants comprises the following steps:

[0030] Take the components organic phosphonate, polycarboxylic acid multi-polymer, zinc salt, copper corrosion inhibitor and water in proportion;

[0031] Add organic phosphonate, polycarboxylic acid multi-polymer, zinc salt, and water into the reaction kettle, wherein water is the solvent, and stir evenly to obtain the first group of materials; the copper corrosion inhibitor alone is used as the second group of materials;

[0032] Group 1 materials and Group 2 materials are packaged separately.

[0033] The above-mentioned scale and corrosion inhibitors used for reclaimed water as circulating cooling water of thermal power plants are used in the application of thermal power plant circulating cooling water treatment systems. ~50mg / L finished product dosage, the dosage of the second group o...

Embodiment 1

[0049] A scale and corrosion inhibitor (TW-318) used for reclaimed water as circulating cooling water in thermal power plants, containing the following components: organic phosphonate, polycarboxylic acid multi-polymer, copper corrosion inhibitor, zinc salt and Water; water is the solvent, and the copper corrosion inhibitor is added separately.

[0050] 1.1 Material preparation: Strictly follow the formula ratio, weigh the quantitative organic phosphonate, polycarboxylic acid multi-polymer, copper corrosion inhibitor, zinc salt and water in sequence.

[0051] 1.2 Production: Add organic phosphonate, polycarboxylic acid multi-polymer copolymer, zinc salt and water into the reaction kettle, start stirring (80 rpm) to dissolve them all, continue stirring for about 20 minutes, mix well and pack , that is, the present invention; the copper corrosion inhibitor is prepared separately and packaged separately.

Embodiment 2

[0053] The antiscaling and corrosion inhibitor used in reclaimed water as circulating cooling water of a thermal power plant according to the invention is tested for reclaimed water corrosion inhibition performance of a sewage treatment plant in Hebei area.

[0054] 2.1 Purpose of the test.

[0055] The method of rotating coupon corrosion test is to evaluate the corrosion inhibition performance of water treatment agent by calculating the corrosion rate and corrosion inhibition rate by using the loss mass of the test piece under the given conditions in the laboratory. The corrosion characteristics of scale and corrosion inhibitors with circulating cooling water as urban reclaimed water are investigated by using the rotating coupon corrosion measurement method, and the indicators such as the change of appearance and color of carbon steel, stainless steel and copper after passing the test, and the corrosion rate measured by the weight loss method are investigated. Comprehensively...

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Abstract

The invention relates to a scale and corrosion inhibitor using recycled water as circulating cooling water in a fired power plant, a method and an application thereof. The recycled water is civic recycled water which is used as the circulating cooling water in the fired power plant in the manner of moisturizing, wherein the scale and corrosion inhibitor contains two sets of components: the first set of component contains organic phosphonate, polycarboxylic polybasic copolymer, zinc salt and water which is used as the solvent, and the second set of component contains copper corrosion inhibitor. The two sets of components are separately packaged. The scale and corrosion inhibitor can efficiently prevent calcium carbonate, scatter calcium carbonate crystallite, change the state of the calcium carbonate crystallite and prevent the generation of ferric oxide and calcium phosphate scale. The invention has the function of preventing the scale and corrosion of the civic water which is rich in salt, ammonia nitrogen and COD, is high in basicity and hardness and has strong anti-corrosion property. The scale and corrosion inhibitor of the invention can meet the demand of inhibiting scale and corrosion by only using 10 to 50 mg/l, so the industrial water usage and cost are saved and the benefit is high.

Description

technical field [0001] The invention relates to the technical field of industrial water treatment, in particular to a scale and corrosion inhibition technology applied to urban reclaimed water as supplementary water of a circulating cooling water system, to prevent scaling and corrosion of pipelines and equipment, especially a reclaimed water It is used as a scale and corrosion inhibitor for circulating cooling water in a thermal power plant, as well as its method and application. The reclaimed water is urban reclaimed water, and the reclaimed water in the city becomes circulating cooling water of a thermal power plant in the form of replenishment, and the scale and corrosion inhibitor is an energy-saving and environment-friendly water treatment agent. The invention is beneficial to rational and effective use of urban reclaimed water. Background technique [0002] The scarcity of fresh water resources and water pollution pose a threat to social progress and economic develop...

Claims

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Application Information

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IPC IPC(8): C02F5/14
Inventor 史玉刘雪冬杜雪梅
Owner 北京拓凯化工技术有限公司
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