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Electric arc spraying process of chloride corrosion preventing alloy coating of garbage incinerator heating surface

A waste incinerator, arc spraying technology, applied in metal material coating process, coating, melting spraying and other directions, can solve problems such as pipe burst, high temperature chlorine corrosion, etc., to improve chlorine corrosion resistance, strong practicability, Significant economic effect

Inactive Publication Date: 2012-07-18
JIANGXI HENGDA HI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an arc spraying process of an anti-chlorine corrosion alloy coating on the heating surface of a garbage incinerator. The spraying process of the present invention is used to form a protective coating on the surface of the heating surface, which can achieve the effect of preventing high-temperature chlorine corrosion and solve the problem of During the working process, due to the high content of Cl in the fuel, the heating surface of the waste incinerator is easily corroded by high-temperature chlorine, causing the problem of tube explosion, which greatly prolongs the service life and maintenance cycle of the pipeline on the heating surface of the waste incinerator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] (1) Clean the surface of the heating surface of the garbage incinerator to remove all kinds of dirt and debris on the sprayed surface, and the cleanliness of the working surface can reach Sa2.5 level; roughen the surface to make the roughness reach R Z 30 μm.

[0008] (2) Within 3-4 hours after sandblasting, use high-nickel alloy wire for arc spraying primer, with a thickness of 0.05mm and a bonding strength of ≥65MPa.

[0009] (3) Supersonic arc spraying technology is used to spray nickel-chromium-molybdenum alloy wire with high hardness, excellent corrosion resistance, good wear resistance and high temperature resistance to make the coating, the thickness is 0.3mm, and the bonding strength is ≥65MPa. The heating surface during spraying Substrate temperature ≤100°C.

[0010] (4) The surface of the coating is sealed with a high-temperature wear-resistant and anti-corrosion silicone sealing agent, the thickness is 0.05mm, and the bonding strength is ≥6MPa.

[0011] (5)...

Embodiment 2

[0013] (1) Clean the surface of the heating surface of the garbage incinerator to remove all kinds of dirt and debris on the sprayed surface, and the cleanliness of the working surface can reach Sa2.5 level; roughen the surface to make the roughness reach R Z 30 μm.

[0014] (2) Within 3-4 hours after sandblasting, use high-nickel alloy wire for arc spraying primer, with a thickness of 0.05mm and a bonding strength of ≥65MPa.

[0015] (3) Supersonic arc spraying technology is used to spray nickel-chromium-molybdenum alloy wire with high hardness, excellent corrosion resistance, good wear resistance and high temperature resistance to make the coating, the thickness is 0.5mm, and the bonding strength is ≥65MPa. The heating surface during spraying Substrate temperature ≤100°C.

[0016] (4) The surface of the coating is sealed with a high-temperature wear-resistant and anti-corrosion silicone sealing agent, the thickness is 0.05mm, and the bonding strength is ≥6MPa.

[0017] (5)...

Embodiment 3

[0019] (1) Clean the surface of the heating surface of the garbage incinerator to remove all kinds of dirt and debris on the sprayed surface, and the cleanliness of the working surface can reach Sa3.0 level; roughen the surface to make the roughness reach R Z 50 μm.

[0020] (2) Within 3-4 hours after sandblasting, use high-nickel alloy wire for arc spraying primer, with a thickness of 0.1mm and a bonding strength of ≥65MPa.

[0021] (3) Supersonic arc spraying technology is used to spray nickel-chromium-molybdenum alloy wire with high hardness, excellent corrosion resistance, good wear resistance and high temperature resistance to make the coating, the thickness is 0.5mm, and the bonding strength is ≥65MPa. The heating surface during spraying Substrate temperature ≤100°C.

[0022] (4) The surface of the coating is sealed with a high-temperature wear-resistant and anti-corrosion silicone sealant, with a thickness of 0.1mm and a bonding strength of ≥6MPa.

[0023] (5) After c...

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Abstract

The invention relates to an electric arc spraying process of a chloride corrosion preventing alloy coating of a garbage incinerator heating surface, which comprise the following steps: (1) cleaning and roughening the garbage incinerator heating surface; (2) adopting high-nickel alloy wire materials to perform electric arc spraying bottoming within 3-4 hours after abrasive blasting; (3) adopting a supersonic speed electric arc spraying technology to nickel-chromium-molybdenum alloy wire materials high in spraying hardness, excellent in corrosion resistance, good in abrasion resistance and high temperature resistance to manufacture the coating; and (4) using a high temperature, abrasion-resisting corrosion-preventing organosilicone sealant to seal holes on the coating surface. The protective coating is formed by adopting the spraying process on the heating surface, the effect of preventing high temperature corrosion can be achieved, the problem that the garbage incinerator heating surface is easily subjected to high temperature chloride corrosion to cause pipe explosion due to fuel containing high C1element in the working process is solved, and the service life and maintain period of garbage incinerator heating surface pipelines are greatly prolonged.

Description

technical field [0001] The invention relates to a process for making a protective coating, in particular to an arc spraying process for an anti-chlorine corrosion alloy coating on a heating surface of a garbage incinerator. Background technique [0002] The use of incineration technology to dispose of industrial and domestic waste is the most effective way to realize the recycling, reduction and harmlessness of solid waste. There are 600 waste incineration plants in Western Europe alone, and this number is currently increasing. Many large and medium-sized cities in my country have or are planning to build large waste incineration plants. However, due to the high content of Cl in waste fuel, when the waste incinerators When the steam temperature exceeds 300°C, the heating surface made of carbon steel will be corroded by high-temperature chlorine or chloride, which becomes a bottleneck problem restricting the power generation efficiency of waste incinerators. Therefore, the hi...

Claims

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Application Information

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IPC IPC(8): C23C4/08C23C4/131
Inventor 李建敏沈竤邹金生陈金灿赵韩飞宋丽丽夏韶华
Owner JIANGXI HENGDA HI TECH CO LTD
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