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Anti-corrosion composite coating in garbage incinerator environment and preparation method of anti-corrosion composite coating

A waste incinerator and composite coating technology, which is applied in combustion methods, coatings, incinerators, etc., can solve the problems of penetrating burst tubes and easy thinning of water walls

Pending Publication Date: 2021-10-01
JIANGXI HENGDA HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the water wall of the waste incineration boiler is easy to thin and penetrate and explode, the purpose of the present invention is to provide an anti-corrosion composite coating in the environment of the waste incinerator and its preparation method

Method used

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Examples

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preparation example Construction

[0030] A preparation method of an anti-corrosion composite coating under a garbage incinerator environment, the steps of the preparation method are as follows:

[0031]The first step, workpiece surface pretreatment: remove grease, dirt, scale, rust and paint on the surface of the substrate, so that the surface of the workpiece is purified, and the cleanliness reaches Sa2.5 level; then use 10-18 mesh emery for sandblasting , so that the surface of the workpiece is roughened and activated, and the surface roughness reaches Rz30-50;

[0032] The second step, arc spraying: the Fe18Cr9Ni3B3Si1C material is sprayed on the surface of the pretreated workpiece by the arc spraying method to form a bottom coating;

[0033] The third step is to evenly coat the K600 coating on the Fe18Cr9Ni3B3Si1C thermal spray coating. The coating after coating can be cured naturally at room temperature or under heating conditions. The natural curing time at room temperature is not less than 24h. If it is...

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Abstract

The invention relates to an anti-corrosion composite coating in a garbage incinerator environment and a preparation method of the anti-corrosion composite coating, and belongs to the technical field of high-temperature oxidation resistance and molten chlorine salt corrosion resistance of water cooling walls of garbage incineration boilers. The composite coating comprises a Fe18Cr9Ni3B3Si1C thermal spraying layer and a K600 coating layer, wherein the Fe18Cr9Ni3B3Si1C thermal spraying layer is a bottom layer and is located between the K600 coating layer and the surface of a workpiece, and the K600 coating layer is a surface layer. The anti-corrosion composite coating and the preparation method solve the problems that the water cooling wall of the waste incineration boiler is prone to thinning and penetration pipe explosion.

Description

technical field [0001] The invention relates to an anti-corrosion composite coating in the environment of a garbage incinerator and a preparation method thereof, and belongs to the technical field of high-temperature oxidation resistance and molten chlorine salt corrosion of a water wall of a garbage incinerator. Background technique [0002] Garbage incinerator is an environmental protection equipment most commonly used for volume reduction and harmless treatment of urban domestic waste. Since waste incinerator uses domestic waste as fuel, compared with general fuels (coal, oil, natural gas), the calorific value of garbage Low, high water content, and contains a variety of high concentrations of corrosive media. Common combustibles in garbage include waste paper, leather, plastic, rubber, paint, bamboo wood, textiles, silt, electronic waste, chlorides and other inorganic salts. They are the heat source of garbage combustion, so when the equipment is running During the proc...

Claims

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Application Information

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IPC IPC(8): C23C28/00C23C4/067C23C4/131C22C38/34C22C38/54F23G5/48C04B35/119C04B35/622
CPCC23C28/321C23C28/34C23C4/067C23C4/131C22C38/34C22C38/54C22C38/005F23G5/48C04B35/119C04B35/62222C04B2235/386C04B2235/5436C04B2235/3427C04B2235/3201
Inventor 李新平龚初华杨卿远
Owner JIANGXI HENGDA HI TECH CO LTD
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