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Anticorrosion paint for chimney of electric plant and its uses

A technology for anti-corrosion coatings and chimneys, applied in the protection of the inner wall of chimneys, in the field of anti-corrosion coatings for power plant chimneys, can solve the problems of not meeting the protection requirements, insufficient acid resistance, easy to fall off brick surfaces, etc., to achieve corrosion resistance and anti-corrosion Good leakage, good air tightness, and the effect of reducing the permeability of the medium

Inactive Publication Date: 2007-08-01
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, lining refractory and acid-resistant bricks is used to protect the inner wall of the chimney. However, this anti-corrosion method cannot fundamentally solve the corrosion problem of the chimney due to the disadvantages of complex structure, high cost, difficult construction, and easy falling off of the brick surface.
[0003] At present, in the heat-resistant or acid-resistant coatings commonly used at home and abroad, the base material of a single heat-resistant coating mostly uses inorganic binders, but the acid resistance is often insufficient; the single acid-resistant coatings mostly use organic polymers as base materials , but the heat resistance is slightly worse
Therefore, none of them can meet the needs of protecting new chimneys or maintenance chimneys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, preparation is colorless and is used for the anticorrosion coating of power plant chimney

[0038] After mixing 40kg tung oil and 10kg maleic anhydride, stir and heat up to 110°C, react for 0.5 hours, then heat up to 110°C, add 22 kg epoxy resin E-44 (epoxy equivalent is 213g / eq), and react 2 hour, lower the temperature to 40°C, add 17.4kg of acetone to dilute, and mix well; then add 10kg of 250 mesh glass flakes and 0.6kg of γ-aminopropyltriethoxysilane in turn, disperse with a high-speed mixer, mix well, and cool to room temperature , and grind twice with a three-roll mill to obtain component A.

[0039] Mix 15kg of the composite curing agent (which is a mixture of 8kg triethanolamine, 4kg diethylenetriamine and 3kg polyethylenepolyamine) and 85kg butanol at 60°C and cool down to room temperature to obtain component B.

[0040] Mix the above-mentioned components A and B according to the weight ratio of 100:25, and fully stir them evenly to obtain the co...

Embodiment 2

[0042] Embodiment 2, preparation white is used for the anticorrosion coating of power plant chimney

[0043] After mixing 24kg tung oil and 6kg maleic anhydride, stir and heat up to 70°C, react for 2 hours, then heat up to 100°C, add 15kg epoxy resin E-21 (epoxy equivalent: 455g / eq), react for 1 hour , cool down to 40°C, add 28.4kg of acetone to dilute, and mix well; then add 20kg of 250-mesh glass flakes, 0.6kg of γ-glycidyl etheroxypropyltrimethoxysilane and 6kg of titanium dioxide in turn, disperse with a high-speed mixer, and mix well , after cooling to room temperature, grind twice with a three-roll mill to obtain component A.

[0044] Mix 10kg of the composite curing agent (which is a mixture of 4kg triethanolamine, 3kg diethylenetriamine and 3kg polyethylenepolyamine) and 90kg acetone at 30°C and cool down to room temperature to obtain component B.

[0045] Mix the above-mentioned components A and B according to the weight ratio of 100:15, and fully stir them evenly to...

Embodiment 3

[0047] Embodiment 3, prepare red anticorrosion paint for power plant chimney

[0048]After mixing 30kg tung oil and 8kg maleic anhydride, stir and heat up to 90°C, react for 1 hour, then heat up to 120°C, add 25kg epoxy resin E-42 (epoxy equivalent is 222g / eq), react for 1.5 hours , lower the temperature to 80°C, add 18.4kg of butanol to dilute and mix evenly; then add 15kg of 250-mesh glass flakes, 0.6kg of γ-methacryloxypropyltrimethoxysilane and 3kg of iron red in sequence, and use a high-speed mixer to carry out Disperse, mix evenly, cool to room temperature, and grind twice with a three-roller mill to obtain component A.

[0049] Mix 30kg of the composite curing agent (which is a mixture of 18kg of triethanolamine, 6kg of diethylenetriamine and 6kg of polyethylenepolyamine) and 70kg of butanol at 40°C and cool down to room temperature to obtain component B.

[0050] Mix the above-mentioned components A and B at a ratio of 100:30 by weight, and stir well to obtain the red...

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PUM

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Abstract

The invention belongs to anticorrosion paint field, which in detail relates to anticorrosion paint for power plant chimney and its application to protecting inner wall of chimney. It comprises: component A: drying-oil modified epoxy resin and flake glass-filled coating; component B composite curing agent: triethanolamine, calcium trisodium diethylenetriamine pentoacetate and polyethylene polyamine.Mixing component A and B according to ratio by weight of 100: 15- 30, coating it on inner wall of chimney, curing at normal temperature for 48 hours and forming hard paing film, which can protect armored concrete or brick construction from corrosion caused by temperature and smoke gas and perlong chimney life length. The product is characterized by strong adhesion force and excellent corrosion- resistance and as long as 30 years' life length.

Description

technical field [0001] The invention belongs to the field of anti-corrosion coatings, and in particular relates to an anti-corrosion coating for power plant chimneys and its application in protecting the inner wall of the chimney. Background technique [0002] It is a very serious problem that the chimneys of thermal power plants are damaged under long-term corrosion. This is mainly due to the presence of SO in the flue gas 2 , SO 3 、H 2 S, CO 2 , NO x , HCl and other acid gases, the acidic liquid formed after they condense on the inner wall of the chimney at 40-80 ° C, thus causing fatal corrosion to the inner wall of the chimney. Traditionally, lining refractory and acid-resistant bricks is used to protect the inner wall of the chimney. However, this anti-corrosion method cannot fundamentally solve the corrosion problem of the chimney due to the disadvantages of complex structure, high cost, difficult construction, and easy falling off of the brick surface. [0003] ...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/08C09D191/00
Inventor 任天瑞张万悟何金太
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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