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Highly-efficient corrosion inhibitor for coal-fired boiler

A technology of coal-fired boilers and corrosion inhibitors, applied in the field of energy chemistry, can solve the problems of reduced service life of heating surfaces, explosion and leakage of boiler tubes, corrosion, etc., and achieve the effect of prolonging service life and reducing corrosion

Inactive Publication Date: 2014-07-16
冯智勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country is a big coal-producing country, with abundant coal resources, high and low coal grades, and a wide range of changes. Affected by my country's energy situation, most of my country's industrial boilers are coal-fired boilers. According to relevant information, At present, the number of coal-fired boilers in my country is about 450,000, and the raw coal consumption accounts for about 1 / 3 of the national raw coal production. In recent years, the overall grade of coal-fired coal has declined, causing many boiler heating surfaces to increase wear, dust accumulation, slagging, corrosion, etc. A series of problems, resulting in reduced service life of the heating surface and frequent leakage of boiler tubes

Method used

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  • Highly-efficient corrosion inhibitor for coal-fired boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of high-efficiency coal-fired boiler corrosion inhibitor, its composition and weight percentage are as follows:

[0018]

[0019] Wherein, each component weight percentage that forms emulsifying agent is:

[0020] Span 80 20%-60%

[0021] Tween 80 20%-60%

[0022] Carboxylated starch 20%-60%

[0023] Wherein, each component and weight percent of composition chemical agent are:

[0024]

[0025] A kind of efficient coal-fired boiler corrosion inhibitor of the present invention, its preparation method is:

[0026] 1. First prepare the emulsifier: add Span 80 to a stirred tank, then add Tween 80 and carboxylated starch respectively, stir well, and prepare 100 grams of emulsifier for use as a spare.

[0027] 2. Preparation of chemical medicament: Add powdered chemical medicaments such as sodium silicate, potassium nitrate, sodium borate, triethanolamine, etc. in another stirred tank, stir evenly, and prepare 100 grams of chemical medicament for subsequent u...

Embodiment 2

[0030] A kind of high-efficiency coal-fired boiler corrosion inhibitor, its composition and weight percentage are as follows:

[0031]

[0032] Wherein, above 2 gram emulsifiers are taken out from the standby emulsifier of embodiment one, and the chemical agent of 15 grams is also taken out from the standby chemical agent of embodiment one, and its each component and weight percent are the same as embodiment one The spare emulsifier and spare chemical agent in it are exactly the same.

[0033] A high-efficiency coal-fired boiler corrosion inhibitor, the preparation method of which is consistent with that described in Example 1.

Embodiment 3

[0035] A kind of high-efficiency coal-fired boiler corrosion inhibitor, its composition and weight percentage are as follows:

[0036]

[0037] Wherein, above 1 gram of emulsifier is taken out from the standby emulsifier of embodiment one, and the chemical agent of 12 grams is also taken out from the standby chemical agent of embodiment one, and its each component and percentage by weight are the same as those in embodiment one The spare emulsifiers and spare chemicals are exactly the same.

[0038] A high-efficiency coal-fired boiler corrosion inhibitor, the preparation method of which is consistent with that described in Example 1.

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Abstract

The invention discloses a highly-efficient corrosion inhibitor for a coal-fired boiler, belonging to the field of energy chemistry. The highly-efficient corrosion inhibitor is mainly applied to the coal-fired boiler and is characterized by consisting of plant oil, water, an emulsifier and a chemical agent, wherein the emulsifier consists of span 80, tween 80 and carboxyl starch; the chemical agent consists of silicate, borate, nitrate and organic amine. The nitrate in the chemical agent can enable the surface of a heating surface of metal in a hearth to generate a purified protecting film which can very effectively protect the heating surface of the metal. In addition, the organic amine in the chemical agent undergoes an adsorption reaction with the metal surface in the boiler to form a protecting film after being thermally decomposed, and such firm chemical adsorption layer is formed by combining electron donators in molecules of the corrosion inhibitor and electron acceptors on the metal surface in a form of coordinate-covalent bonds. Therefore, the purposes of efficiently inhibiting corrosion and protecting the heating surface of the coal-fired boiler are achieved.

Description

technical field [0001] The invention belongs to the field of energy chemistry and relates to a high-efficiency corrosion inhibitor for coal-fired boilers. Background technique [0002] my country is a big coal-producing country, with abundant coal resources, high and low coal grades, and a wide range of changes. Affected by my country's energy situation, most of my country's industrial boilers are coal-fired boilers. According to relevant information, At present, the number of coal-fired boilers in my country is about 450,000, and the raw coal consumption accounts for about 1 / 3 of the national raw coal production. In recent years, the overall grade of coal-fired coal has declined, causing many boiler heating surfaces to increase wear, dust accumulation, slagging, corrosion, etc. A series of problems, resulting in the reduction of the service life of the heating surface and the frequent leakage of boiler tubes. It can be seen that whether the corrosion inhibition and protectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/00
Inventor 冯智勇
Owner 冯智勇
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