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Technology for processing alloy material for coal gas burning waste heat recovery pipe

A technology of waste heat recovery and alloy materials, which is applied in the direction of metal material coating process, coating, molten spraying, etc., can solve the problems of no waste heat recovery, low boiler thermal efficiency, high exhaust gas temperature, etc., so as to save energy and reduce manufacturing costs. cost, and the effect of extending the service life

Inactive Publication Date: 2016-08-31
JIANGSU JINYUAN TENGFENG HEAT EXCHANGE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, during the operation of industrial boilers, there are problems such as high exhaust gas temperature, insufficient combustion, and low boiler thermal efficiency. Part of the waste heat is not recovered, and this part of the energy can be fully utilized to heat the air and water, and increase the temperature of the air and feed water, which can improve the fuel utilization efficiency to a certain extent
In the prior art, in order to prevent the corrosion of the flue gas waste heat recovery pipeline and reduce the huge loss caused by the corrosion of steel materials, various anti-corrosion methods must be adopted, and hot-dip galvanizing treatment is a commonly used treatment method However, there are few metal heat pipes in the prior art that can greatly enhance their anti-corrosion performance without adding anti-corrosion coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a treatment process for alloy materials used in gas incineration waste heat recovery pipelines, including the following specific steps:

[0038] ⑴The components of the pipe blank include: Al: 1.3%, Mg: 2.6%, Ti: 1.25%, Si: 0.40%, Cu: 0.01%, Mn: 1.5%, Zn: 1.4%, Zr: 0.10 %, rare earth element 1.10%, impurity content <0.015%, and the balance is Fe; the rare earth contains the following components by weight percentage: Gd: 15%, Pr: 3%, Dy: 7%, Ac: 12.5% , Nd: 15%, Sm: 11%, and the balance is La; according to the above components, the billet is refined and rolled into a pipe billet of the required size;

[0039] Clean the surface of the profile blank with a mixture of acetone and absolute ethanol for 3 times, then rinse it with water for 2 times, and finally dry the cleaned profile blank for later use;

[0040] (2) Sandblasting is performed on the surface of the pipe blank in step (1), the sandblasting process is: sandblasting gas pressure 0.4MPa, san...

Embodiment 2

[0045] This embodiment provides a treatment process for alloy materials used in gas incineration waste heat recovery pipelines, including the following specific steps:

[0046] ⑴The components of the pipe blank include: Al: 1.3%, Mg: 2.6%, Ti: 1.25%, Si: 0.40%, Cu: 0.01%, Mn: 1.5%, Zn: 1.4%, Zr: 0.10 %, rare earth element 1.10%, impurity content <0.015%, and the balance is Fe; the rare earth contains the following components by weight percentage: Gd: 15%, Pr: 3%, Dy: 7%, Ac: 12.5% , Nd: 15%, Sm: 11%, and the balance is La; according to the above components, the billet is refined and rolled into a pipe billet of the required size;

[0047] Clean the surface of the profile blank with a mixture of acetone and absolute ethanol for 4 times, then rinse it with water for 2 times, and finally dry the cleaned profile blank for later use;

[0048] (2) Sandblasting is carried out on the surface of the pipe blank in step (1), the sandblasting process is: sandblasting gas pressure 0.4MPa,...

Embodiment 3

[0054] This embodiment provides a treatment process for alloy materials used in gas incineration waste heat recovery pipelines, including the following specific steps:

[0055] ⑴The components of the pipe blank include: Al: 1.3%, Mg: 2.6%, Ti: 1.25%, Si: 0.40%, Cu: 0.01%, Mn: 1.5%, Zn: 1.4%, Zr: 0.10 %, rare earth element 1.10%, impurity content <0.015%, and the balance is Fe; the rare earth contains the following components by weight percentage: Gd: 15%, Pr: 3%, Dy: 7%, Ac: 12.5% , Nd: 15%, Sm: 11%, and the balance is La; according to the above components, the billet is refined and rolled into a pipe billet of the required size;

[0056] Clean the surface of the profile blank with a mixture of acetone and absolute ethanol for 6 times, then rinse it with water for 4 times, and finally dry the cleaned profile blank for later use;

[0057] (2) Sandblasting is carried out on the surface of the pipe blank in step (1), the sandblasting process is: sandblasting gas pressure 0.5MPa,...

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PUM

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Abstract

The invention provides a technology for processing an alloy material for a coal gas burning waste heat recovery pipe; the particularity of a production process is combined, a pipe profile is heated by high temperature waste heat of a hot-rolled profile, so as to achieve the purpose of replacement of low temperature tempering and make the profile reach same mechanical properties as properties obtained after low temperature tempering; the profile after treatment has high binding force, has excellent properties of corrosion resistance and high toughness, and can effectively extend the service life of the metal pipe in a heat recovery system. According to the method, a stack cooling technology is used for replacing the low temperature tempering technology; a plate treated through the method has the actual product quality having the same mechanical property indexes as those of heat treatment at the same temperature, and standard requirements are met; the method not only simplifies the production process, saves energy, and reduces manufacturing costs.

Description

technical field [0001] The invention relates to a pipeline material, in particular to a treatment process for an alloy material used in a gas incineration waste heat recovery pipeline, and belongs to the technical field of profile treatment of equipment. Background technique [0002] At present, during the operation of industrial boilers, there are problems such as high exhaust gas temperature, insufficient combustion, and low boiler thermal efficiency. Part of the waste heat has not been recovered, and this part of energy can be fully utilized to heat the air and water, and increase the air temperature and feed water temperature, which can improve fuel utilization efficiency to a certain extent. In the prior art, in order to prevent the corrosion of the flue gas waste heat recovery pipeline and reduce the huge loss caused by the corrosion of steel materials, various anti-corrosion methods must be adopted, and hot-dip galvanizing treatment is a commonly used treatment method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/14C22C38/02C22C38/16C22C38/04C23C4/131C23C4/08C21D8/02B24C1/08
CPCB24C1/08C21D8/0247C22C38/002C22C38/005C22C38/02C22C38/04C22C38/06C22C38/14C22C38/16C23C4/08Y02P70/10
Inventor 李明祥朱冬宏陈道祥
Owner JIANGSU JINYUAN TENGFENG HEAT EXCHANGE EQUIP CO LTD