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Temperature-resistant anti-corrosion lining coating for riser heat exchanger and construction method thereof

A construction method and technology of heat exchangers, which are applied in coatings, devices for coating liquids on surfaces, and pre-treated surfaces, etc., can solve problems such as poor heat transfer performance, potential safety hazards, and black smoke, so as to prevent rising Damaged tube heat exchanger, improved safety and stability, smooth surface without cracks

Active Publication Date: 2021-10-15
常州江南冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Raw coal gas has complex components, high temperature and strong corrosiveness. When the temperature drops, tar will be precipitated, and the inner wall of the riser heat exchanger will be corroded and tarred during use; the corrosion of the inner wall will seriously affect the riser exchange The service life of the heater and potential safety hazards; the problem of tar formation will cause the coking plant to fail to discharge coke normally, and often emit black and yellow smoke, which will affect the normal operation of the coke oven and cause serious environmental pollution
[0004] Chinese invention patent application CN 106543779 A provides a high-temperature-resistant, corrosion-resistant nano-self-cleaning coating, through nano-silica, nano-zirconia, nano-scale ceramic powder, nano-titanium dioxide, nano-silicon nitride, nano-iron oxide, nano-oxidation Composed of magnesium, triphenyl phosphate, absolute ethanol, aminosilane, and water, the composition is complex. When spraying, it has strict requirements on the surface of the riser and is not easy to squeegee; the self-cleaning coating prevents tar adhesion through the low friction coefficient of the surface layer. However, its heat transfer performance is poor, and it cannot fundamentally solve the problem of tar generation

Method used

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  • Temperature-resistant anti-corrosion lining coating for riser heat exchanger and construction method thereof
  • Temperature-resistant anti-corrosion lining coating for riser heat exchanger and construction method thereof
  • Temperature-resistant anti-corrosion lining coating for riser heat exchanger and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Calculated on the basis of 100kg of solid raw materials, fused mullite, silicon carbide powder, alumina micropowder, steel fiber, and cement, 42.5kg of fused mullite, 42.0kg of silicon carbide powder, 5.6kg of alumina micropowder, 3.5kg of steel fiber, 6.4kg of cement, and 5.2kg of silica sol; 2 o 3 -SiO 2 The content is not less than 98.2%; the SiC content in the silicon carbide powder is 97%, and the particle size of the silicon carbide powder is 200 mesh; the alumina micropowder is α-Al 2 o 3 , the particle size of alumina micropowder is 800 mesh, α-Al 2 o 3 The content is 99.0%; the diameter of the steel fiber is 0.5mm, the length is 3.0mm-5.0mm stainless steel filament; the SiO in the silica sol 2 The content is 30%.

[0034] When preparing this kind of lining coating, pour the solid raw materials fused mullite, silicon carbide powder, alumina micropowder, steel fiber, and cement into the mixer, stir evenly, and pour the mixed solid mixture into the silicon s...

Embodiment 2

[0036] Calculated on the basis of 100kg of solid raw material fused mullite, silicon carbide powder, alumina micropowder, steel fiber and cement, 48.0kg fused mullite, 32.0kg silicon carbide powder, 7.0kg alumina micropowder, 7.5kg of steel fiber, 5.5kg of cement, and 6.0kg of silica sol; 2 o 3 -SiO 2 The content is not less than 98.2%; the SiC content in the silicon carbide powder is 97%, and the particle size of the silicon carbide powder is 200 mesh; the alumina micropowder is α-Al 2 o 3 , the particle size of alumina micropowder is 800 mesh, α-Al 2 o 3 The content is 99.0%; the diameter of the steel fiber is 0.5mm, the length is 3.0mm-5.0mm stainless steel filament; the SiO in the silica sol 2 The content is 30%.

Embodiment 3

[0038] Calculated on the basis of 100kg of solid raw materials, fused mullite, silicon carbide powder, alumina micropowder, steel fiber, and cement, 44.8kg of fused mullite, 36.6kg of silicon carbide powder, 7.5kg of alumina micropowder, 5.7kg of steel fiber, 5.4kg of cement, and 6.8kg of silica sol; 2 o 3 -SiO 2 The content is not less than 98.2%; the SiC content in the silicon carbide powder is 97%, and the particle size of the silicon carbide powder is 200 mesh; the alumina micropowder is α-Al 2 o 3 , the particle size of alumina micropowder is 800 mesh, α-Al 2 o 3 The content is 99.0%; the diameter of the steel fiber is 0.5mm, the length is 3.0mm-5.0mm stainless steel filament; the SiO in the silica sol 2 The content is 30%.

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Abstract

The invention relates to a temperature-resistant anti-corrosion lining coating for a riser heat exchanger and a construction method thereof. The lining coating comprises the following components in percentage by mass: 40.0%-50.0% of fused mullite, 32.0%-42.0% of silicon carbide powder, 5.0%-10.0% of alumina micro powder, 2.0%-10.0% of steel fibers and 2.0%-10.0% of cement, and the total mass percentage of the fused mullite, the silicon carbide powder, the alumina micro powder, the steel fibers and the cement is 100%. The mass of the silica sol accounts for 5-10% of the total mass of the fused mullite, the silicon carbide powder, the alumina micro powder, the steel fiber and the cement; the construction method comprises the steps of solid raw material mixing, coating preparation, framework fixing and coating coating, the prepared coating is evenly coated on the inner wall of the ascending pipe, and after natural curing, the formed solid coating layer is formed through baking. The lining coating is uniformly coated on the inner wall of the riser heat exchanger and is fixed through the hexsteel, so that the coating is effectively prevented from stripping, the problems of corrosion, coking and smoking of the riser heat exchanger are effectively solved, the riser heat exchanger is prevented from being damaged, and the safety and the stability of the heat exchange device are improved.

Description

technical field [0001] The invention belongs to the technical field of riser pipe coatings, and in particular relates to a temperature-resistant and anti-corrosion lining paint for heat exchangers of riser pipes and a construction method. Background technique [0002] At present, the domestic coking process is mainly that the coking coal is heated and dry-distilled in the coke oven with isolated air to generate coke, and at the same time produce a large amount of volatilized raw gas. Among them, the temperature of the red coke released from the coke oven carbonization chamber is 950-1050°C, and the temperature of the raw gas of the coke oven is 650-800°C. [0003] Raw coal gas has complex components, high temperature and strong corrosiveness. When the temperature drops, tar will be precipitated, and the inner wall of the riser heat exchanger will be corroded and tarred during use; the inner wall corrosion will seriously affect the riser tube exchange The service life of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00B05D7/24B05D3/02F28F19/02
CPCC04B28/00B05D7/24B05D3/0254F28F19/02C04B2111/00508C04B2111/763C04B14/48C04B14/324C04B14/303C04B14/041
Inventor 马庆磊张家立刘洋邵魏韩培
Owner 常州江南冶金科技有限公司
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