A method for decarbonizing converter and/or blast furnace gas

Abstract

The invention discloses a converter and / or blast furnace gas decarbonizing method which comprises the following steps: coarsely decarbonizing: utilizing a pressure swing adsorption mode to coarsely decarbonize converter and / or blast furnace gas and remove hydrogen phosphide; making the carbon dioxide volume fraction of the pressure swing absorption converter and / or blast furnace gas as 5.8 to 6.2%and the hydrogen phosphide content as 1 to 5 PPM; finely decarbonizing: utilizing an MDEA solution to decarbonize the converter and / or blast furnace gas in the S1 and making the carbon dioxide volumefraction of the converter and / or blast furnace gas as 0.0015 to 0.0019%. According to the converter and / or blast furnace gas decarbonizing method disclosed by the invention, two steps of work procedures of pressure swing adsorption decarbonization and MDEA solution fine decarbonization are creatively utilized for finishing decarbonizing the converter and / or blast furnace gas, breakthrough in converter and / or blast furnace gas decarbonization is achieved, and very important significance in promoting technological advance of China steel industry and economic development are achieved.

Description

technical field [0001] The invention relates to the field of gas purification, in particular to a method for decarbonizing converter and / or blast furnace gas. Background technique [0002] Energy and environmental issues are becoming the focus of global and regional attention. The iron and steel industry is a traditional industry with high logistics, high energy consumption, and high pollution, and it is an industry that focuses on energy conservation and emission reduction. From the perspective of industries that produce carbon dioxide, about 50% of carbon dioxide emissions come from industrial production, and the domestic iron and steel industry's carbon dioxide emissions account for about 14% of the country's total. The ironmaking process is the main source of carbon dioxide emissions in the iron and steel industry, accounting for about Carbon dioxide emissions account for more than 90% of carbon dioxide emissions, and carbon dioxide emissions from my country's steel indus...

AI Technical Summary

Problems solved by technology

But at present, there is no specific process technology for the separation and recovery of carbon dioxide gas in converter and blast furnace gas in my country, and it is still in the stage of theoretical research.

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