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Method and device for heat treatment furnace flue gas return protection

A heat treatment furnace and furnace flue gas technology, which is applied in the metallurgical field, can solve the problem of setting a separate gas source for the protective gas, and achieve the effects of cost saving, less risk and less energy.

Active Publication Date: 2019-01-04
石家庄鹏远自动化工程技术有限公司
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Problems solved by technology

[0004] The object of the present invention is to provide the protection method and device thereof for heat treatment furnace flue gas return, to solve the existing The technical problem that the protective gas needs to be set separately in the operation

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  • Method and device for heat treatment furnace flue gas return protection

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Embodiment Construction

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] see figure 1 , the protection method for heat treatment furnace flue gas loopback provided by the present invention will now be described. The method for protection of heat treatment furnace flue gas return includes the following steps:

[0026] 1) will contain N 2 , NO x , CO 2 , O 2 and H 2 The high-temperature flue gas leaving the furnace composed of O is discharged into the inner tank 41 of the waste heat heating device 4, and the flue gas leaving the furnace passes through the flue gas outlet 412 on the inner tank 41 and arrives in the open flame...

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Abstract

The invention provides a method and a device for the heat treatment furnace flue gas return protection, and belongs to the technical field of metallurgy. The method comprises the following steps: off-furnace flue gas is discharged into an inner container of a residual heat heating device, and the off-furnace flue gas passes through an off-furnace flue gas outlet on the inner container and reachesan open flame combustion deaerator through a connecting pipe; O2 in the flue gas is removed by the open flame combustion deaerator; the O2-removed off-furnace flue gas is discharged into a water removing device to remove part of H2O in the flue gas; the treated flue gas is a shielding gas, the shielding gas is sent to a clamp cover of the residual heat heating device, and the heated shielding gasreaches a heat treatment furnace. According to the method and the device for the heat treatment furnace flue gas return protection, provided by the invention, the shielding gas is obtained by treatingthe off-furnace flue gas, and the off-furnace flue gas generated by the furnace is used as the shielding gas, therefore, the risk is small, the purchase of a hydrogen source, a nitrogen source, or other shielding gas preparation devices are not needed additionally, and most of the expenses are saved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and more specifically relates to a protection method and device for heat treatment furnace flue gas return. Background technique [0002] The heat treatment furnace needs to add an independent protective gas to reduce the oxidation of the heat treatment workpiece. In order to prevent the heat treatment workpiece from being oxidized during the high temperature heating process, the heat treatment furnace must be filled with a protective gas for non-oxidation protection. The protective gas is generally hydrogen or nitrogen. , or self-made DX gas, the purpose of using the above gas is to control the stability of the atmosphere in the heat treatment furnace. [0003] The above three kinds of protective gases all need to set the gas source separately, and the investment is relatively large; in addition, the H 2 And the self-made DX gas is flammable and explosive, the system is complicated, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/773C21D9/00F27D17/00
CPCC21D1/773C21D9/0006F27D17/008Y02P10/25
Inventor 邢建昭殷兴武邢晨殷冰涛
Owner 石家庄鹏远自动化工程技术有限公司
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