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High temperature anti-slag anti-coking coating

An anti-coking and coating technology, applied in the field of coatings, can solve the problems of threatening the safe production of boiler companies, decline in economic benefits of enterprises, and economic losses of enterprises, and achieve the effects of excellent high temperature and chemical stability, simple construction and strong anti-coking effect.

Active Publication Date: 2005-11-23
JIANGXI HENGDA HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coke slag will cause the temperature in the furnace to rise, and the furnace tube will overheat to exceed its allowable operating temperature, causing tube explosion, which seriously threatens the safe production of boiler companies, causes major accidents, and leads to a serious decline in the economic benefits of the company.
[0003] At present, there is no production of anti-slagging and anti-coking products in China. The usual practice of enterprises is to stop the furnace for coking, use compressed air to blow soot or replace the furnace tube, which has brought huge economic losses to the enterprise. According to incomplete statistics, my country There are more than 500,000 industrial boilers and more than 160,000 kilns. Anti-coking products will be of great significance to my country's social and economic development and scientific and technological progress

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Take 25kg of zirconium dioxide, 15kg of aluminum oxide, 5kg of magnesium oxide, 5kg of potassium fluorosilicate, 5kg of zinc powder, 2kg of cerium oxide, 40kg of sodium silicate, and 3kg of sodium hexametaphosphate. , and then mixed and stirred, and then mixed evenly with the above-mentioned wet materials after sampling and testing.

[0012] The technical principle of the present invention is: according to the surface infiltration principle, utilize ZrO 2 -The physical characteristics of MgO composite material that slag is difficult to infiltrate make coke clusters slide off the surface of the coating like balls, thereby preventing the accumulation of molten ash on the surface of the coating, avoiding the formation of coking, and achieving the purpose of anti-slag and anti-coking . After testing, the product of the present invention has anti-coking property ≤ 5%, wear resistance ≤ 8g / 1000r, thickness 0.8-1.2mm, hardness ≥ 160HB, density 2.0-2.5g / cm 3 , use temperature...

Embodiment 2

[0014] Get zirconium dioxide 45kg, aluminum oxide 20kg, magnesium oxide 20kg, potassium fluorosilicate 5kg, metal powder 5kg, cerium oxide 3kg, sodium silicate 45kg, sodium hexametaphosphate 5kg, by the method identical with embodiment 1 Obtain the high temperature anti-slag anti-coking coating of the present invention.

Embodiment 3

[0016] Get zirconium dioxide 25kg, aluminum oxide 18kg, magnesium oxide 15kg, fluorosilicate 5kg, metal powder 3kg, cerium oxide 2kg, sodium silicate 30kg, hexametaphosphate 5kg, by the method identical with embodiment 1 Obtain the high temperature anti-slag anti-coking coating of the present invention.

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Abstract

The invention discloses a high temperature anti-slag anti-coking coating comprising the components (by weight ratio) of zirconium dioxide 20-50 parts, aluminum oxide 14-20 parts, magnesium oxide 14-20 parts, fluorosilicate 3-5 parts, metal powder 3-5 parts, rare-earth oxide 2-3 parts, soluble silicate 30-50 parts, orthophosphates 3-5 parts.

Description

technical field [0001] The invention relates to a paint, in particular to a high-temperature slag-resistant and anti-coking paint. Background technique [0002] Boiler coking is mainly formed by the molten or partially molten particles entrained in the flue gas colliding with the furnace wall and being cooled and solidified. It is easy to occur on the heating surface of the boiler, such as boiler water wall tubes, high temperature superheater tubes, high temperature reheating Tubes, furnaces, burner nozzles, drains, etc. The coke slag will cause the temperature in the furnace to rise, and the furnace tube will overheat to exceed its allowable operating temperature, causing a tube burst, which seriously threatens the safe production of the boiler company, causes major accidents, and leads to a serious decline in the economic benefits of the company. [0003] At present, there is no production of anti-slagging and anti-coking products in China. The usual practice of enterpris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
Inventor 朱星河
Owner JIANGXI HENGDA HI TECH CO LTD
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