Method for self-sustained combustion of converter released coal gas based on perovskite catalyst

Abstract

The embodiment of the invention relates to a method for self-sustained combustion of converter released coal gas based on perovskite catalyst. The method comprises the steps that perovskite catalyst powder is prepared; and the interior of a fixed bed reactor device is filled with the perovskite catalyst powder, released coal gas is lead into the fixed bed reactor device, and the perovskite catalyst powder has a catalytic reaction with the released coal gas, so that CO in the released gas is converted into CO2. Therefore, the method is simple in process and easy to control, CO catalytic combustion efficiency is high, smoke waste heat use quality is high, external heat supply is not needed, running cost is low, the method is used for treating the high-temperature released coal gas, the emission standards of the nation or regions can be achieved, the waste heat use quality is improved, the waste heat use manner can be widened, and the considerable economic benefits can be created.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of converter gas treatment, and in particular to a method for self-sustaining combustion of converter gas based on a perovskite catalyst. Background technique [0002] Converter steelmaking technology is one of the mainstream steelmaking technologies in my country's iron and steel enterprises. During the process of converter steelmaking, a large amount of high-temperature converter gas will be produced. Due to the intermittence of steelmaking, the concentration of high-temperature converter gas has great fluctuations. In the early and late stages of steelmaking, high-temperature converter gas has high oxygen content (>3%) and low CO concentration (<35%), which is not suitable for gas recovery. Therefore, after the waste heat is utilized, it is directly fired and dissipated. The quality of waste heat utilization is low, and the application range of waste heat is limited, result...

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Problems solved by technology

[0004] Chinese patent, authorized announcement number CN105642108B, discloses a method for CO recovery and treatment in the metallurgical industry. The method treats CO through low-temperature plasma coupling Cu-based composite oxide catalyst, which can realize CO catalytic combustion under low temperature conditions, but the catalyst does not Not suitable for catalytic combustion of high temperature gas release

[0006] Although there are many studies above, there is no report on the method of catalytic combustion of high-temperature exhaust gas (CO) with perovskite catalysts in the public literature. Therefore, a method for high-efficiency self-sustained combustion of high-temperature converter exhaust gas using perovskite catalysts was developed. , which can provide a revolutionary new technology for the comprehensive utilization of high-temperature converter gas, and promote energy saving and emission reduction in the metallurgical industry

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