Anti-coking and anti-slagging coating material for four tubes of boiler and preparation method of anti-coking and anti-slagging coating material

A coating material and anti-coking technology, applied in coatings, fireproof coatings, alkali metal silicate coatings, etc., can solve problems such as high construction cost, coke drop and fire extinguishing, easy coking and slagging, etc., and achieve anti-coking Excellent slag performance, reduced engineering quantity, and good bonding and adhesion effects

Inactive Publication Date: 2019-03-19
深圳陶金材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide an anti-coking and slagging coating material for boiler four tubes and its preparation method and construction process, aiming to solve the problem of easy coking of existing alloy coating materials. Slag, lost coke fire extinguishing, high construction cost

Method used

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  • Anti-coking and anti-slagging coating material for four tubes of boiler and preparation method of anti-coking and anti-slagging coating material
  • Anti-coking and anti-slagging coating material for four tubes of boiler and preparation method of anti-coking and anti-slagging coating material
  • Anti-coking and anti-slagging coating material for four tubes of boiler and preparation method of anti-coking and anti-slagging coating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Raw material ratio: binder aluminum monohydrogen phosphate 15.0g, magnesium dihydrogen phosphate 15.0g, lubricating and non-stick material boron nitride 5.0g, heat-resistant pigment alumina 30.0g, passivator 3.0g, mixing aid 2.0g , Dispersion medium water 30.0g.

[0050] Coating preparation: Take part of water, mixing aid, passivating agent, binder aluminum monohydrogen phosphate, magnesium dihydrogen phosphate, and heat-resistant pigment aluminum oxide and add them to the stirring tank, and stir for 10 minutes at a line speed of 1.0m / s to obtain the first mixed material;

[0051] Add the lubricating and non-stick material boron nitride and the rest of the water to the first mixed material, use a temperature-controllable high-pressure homogeneous disperser to completely homogenize the coating at a temperature of 4°C and a pressure of 150MPa, and filter until the particle size is less than 25μm The material is discharged to obtain an anti-coking and slagging coating mat...

Embodiment 2

[0061] Raw material ratio: binder aluminum dihydrogen phosphate 20.0g, iron dihydrogen phosphate 10.0g, manganese dihydrogen phosphate 5.0g, lubricating and non-stick material boron nitride 40.0g, heat-resistant pigment chromium carbide 5.0g, passivator 3.0 g, 2.0 g of mixing aids, and 15.0 g of water as a dispersion medium.

[0062] Coating preparation: Take part of water, mixing aid, passivator, binder aluminum dihydrogen phosphate, iron dihydrogen phosphate, manganese dihydrogen phosphate, and heat-resistant pigment chromium carbide and add them to the stirring tank, and the online speed is 1.0m / s Down stirring 30min, obtain the first mixed material;

[0063] Add the lubricating and non-stick material boron nitride and the rest of the water to the first mixed material, use a temperature-controllable high-pressure homogeneous disperser to completely homogenize the coating at a temperature of 15°C and a pressure of 200MPa, and filter until the particle size is less than 25μm ...

Embodiment 3

[0073] Raw material ratio: binder magnesium monohydrogen phosphate 25.0g, calcium dihydrogen phosphate 15.0g, copper monohydrogen phosphate 10.0g, lubricating and non-stick material boron nitride 5.0g, molybdenum disulfide 3.0g, heat-resistant pigment zirconia 10.0 g, passivator 3.0g, mixing aid 3.0g, dispersion medium water 26.0g.

[0074] Coating preparation: Take part of water, mixing aid, passivator, binder magnesium monohydrogen phosphate, calcium dihydrogen phosphate, copper monohydrogen phosphate, heat-resistant pigment zirconia and add it to the stirring tank, and the line speed is 3.0m / s Down stirring 30min, obtain the first mixed material;

[0075] Add lubricating and non-stick materials boron nitride, molybdenum disulfide and the rest of water to the first mixed material, and use a temperature-controllable high-pressure homogeneous disperser to completely homogenize the coating at a temperature of 25 ° C and a pressure of 190 MPa until the particle size After the mat...

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Abstract

The invention discloses an anti-coking and anti-slagging coating material for four tubes of a boiler as well as a preparation method and a construction process of the anti-coking and anti-slagging coating material. The anti-coking and anti-slagging coating material comprises the components in percentage by mass: 30-50% of high-temperature-resistant binder, 5-40% of lubricating nonstick material, 5-30% of heat-resistant filler, 0.5-5% of auxiliaries and 0-50% of dispersion medium. The coating material is prepared by using a special preparation method and is better in homogenization and stable in storage. The coating material is not only good in anti-coking and anti-slagging properties, good in long-term heat resistance and good in heat matching property with a substrate, but also good in binding adhesion for a metal substrate.

Description

technical field [0001] The invention relates to the technical field of coating materials, in particular to an anti-coking and slagging coating material for four tubes of a boiler, a preparation method and a construction process thereof. Background technique [0002] Coking is a relatively common problem in boiler operation. Generally, the ash particles moving together with the flue gas are cooled together with the flue gas due to the heat absorption of the heating surface of the furnace water wall. When the liquid slag particles have solidified due to the drop in temperature before approaching the water-cooled wall or the furnace wall, when they adhere to the tube wall of the heating surface of the water-cooled wall, a loose ash layer will be formed, which can be easily removed by soot blowing during operation. Lose. When the temperature in the furnace is high or the ash melting point is low, a part of the ash particles are still in a molten or semi-molten state when they a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D1/00C09D1/02C09D7/61
CPCC08K2003/162C08K2003/2227C08K2003/2244C08K2003/2251C08K2003/3009C08K2003/385C09D1/00C09D1/02C09D5/18C09D7/61C09D7/70C09D183/04C08K13/04C08K3/38C08K3/16C08K7/00C08K3/22C08K3/00C08K3/30C08K3/36
Inventor 王亚文戴雷唐知桥刘春艳
Owner 深圳陶金材料科技有限公司
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