Preparation method of biomass boiler heating surface protection coating

A biomass boiler and protective coating technology, applied in the coating, metal material coating process, melt spraying and other directions, can solve the problems of affecting the service life of biomass boilers, poor corrosion resistance, coating cracking, etc. The effect of improving the density, enhancing the corrosion resistance and enhancing the bonding ability

Inactive Publication Date: 2019-03-12
SHENYANG INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the heating surface of the biomass boiler in the prior art has poor corrosion resistance in a high temperature environment, and the coating is prone to cracking and falling off, which seriously affects the service life of the biomass boiler.

Method used

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  • Preparation method of biomass boiler heating surface protection coating
  • Preparation method of biomass boiler heating surface protection coating
  • Preparation method of biomass boiler heating surface protection coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a protective coating on a heating surface of a biomass boiler, comprising the following steps:

[0029] (1) Preparation of powder core wire

[0030] Put the core powder into the powder feeder of the wire rolling machine, roll the stainless steel strip on the rolling machine to form grooves, the powder feeder sends the mixed core powder into the groove, and the rolling machine passes through the rollers The steel strip is gradually closed into a circular wire by rolling, and then the rolled and formed wire is drawn on a wire drawing machine, gradually reduced in diameter, and finally reaches the required size of φ2.00mm for arc spraying, and the powder core wire is obtained, of which The powder core powder is made of the following components by weight: 45 parts of nickel powder, 28 parts of chromium powder, 4 parts of molybdenum powder, 4 parts of aluminum powder, 1 part of indium powder, 1 part of aluminum silicon powder, and 8% of rare earth:

...

Embodiment 2

[0041] A method for preparing a protective coating on a heating surface of a biomass boiler, comprising the following steps:

[0042] (1) Preparation of powder core wire

[0043] Put the core powder into the powder feeder of the wire rolling machine, roll the stainless steel strip on the rolling machine to form grooves, the powder feeder sends the mixed core powder into the groove, and the rolling machine passes through the rollers The steel strip is gradually closed into a circular wire by rolling, and then the rolled and formed wire is drawn on a wire drawing machine, gradually reduced in diameter, and finally reaches the required size of φ2.00mm for arc spraying, and the powder core wire is obtained, of which The powder core powder is made of the following components by weight: 55 parts of nickel powder, 32 parts of chromium powder, 6 parts of molybdenum powder, 6 parts of aluminum powder, 3 parts of indium powder, 3 parts of aluminum silicon powder, and 12% of rare earth; ...

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Abstract

The invention discloses a preparation method of a biomass boiler heating surface protection coating. The preparation method of the biomass boiler heating surface protection coating comprises the following operation steps of (1) placing powder core powder into a powder feeder of a wire rolling mill, firstly rolling a stainless steel band into a groove through a rolling machine, using the powder feeder for feeding the mixed powder core powder into the groove, using the rolling machine for gradually closing the steel band to form a circular wire material through a roller, placing the rolled wirematerial onto a wire drawing machine for drawing, gradually reducing the diameter, finally achieving the size phi 2.00mm required for electric arc spraying, and obtaining a powder core wire; (2) spraying a modification solution on the surface of a base material used for a biomass boiler heating surface, and then sand-blasting; and (3) adopting an electric arc spraying device for preparing the coating on the surface of the base material through a double-strand wire feeding manner. The preparation method of the biomass boiler heating surface protection coating provided by the invention is simpleto operate, low in cost, and remarkable in protection effect.

Description

technical field [0001] The invention belongs to the technical field of biomass boiler protection, and in particular relates to a preparation method of a protective coating on a heating surface of a biomass boiler. Background technique [0002] Biomass boiler is a type of boiler. Boilers that use biomass energy as fuel are called biomass boilers. They are divided into biomass steam boilers, biomass hot water boilers, biomass hot blast stoves, biomass heat-conducting oil Material boilers, horizontal biomass boilers, etc. The boiler adopts the most suitable combustion equipment for biomass fuel combustion - reciprocating grate. In terms of structural design, the boiler has a larger furnace space than traditional boilers, and a very reasonable secondary air is arranged at the same time, which is conducive to the full combustion of a large amount of volatile matter that is precipitated instantaneously during the combustion of biomass fuel. [0003] The boiler can be equipped wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/02C23C4/06C23C4/131
CPCC23C4/02C23C4/06C23C4/131
Inventor 张小辉王超王启民
Owner SHENYANG INST OF ENG
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