Method and device for separating carbon dioxide to improve mass energy of blast furnace gas

Abstract

A method and a device for capturing, separating, recovering and recycling carbon dioxide in blast furnace gas provide an energy-saving technology which improves the mass energy of blast furnace gas and reduces the emission of carbon dioxide, and belong to the fields of iron and steel metallurgy as well as greenhouse gas emission reduction. The method and the device for recovering and separating the carbon dioxide in blast furnace gas consist of a gas processing system, an absorption tower, a regeneration tower, and a built-in boiling device, integrate a conventional blast furnace gas processing system, and are added with a chemical absorption system, thus leading the carbon dioxide in blast furnace gas to be captured, recovered and utilized; after partial external carbon dioxide is added, the recovered carbon dioxide is used for the gas carrier of fuel injected by a blast furnace and the blast of a hot blast furnace, and the entry of the carbon dioxide into the furnace promotes the chemical reaction in the blast furnace, thereby achieving the recycling utilization of the carbon dioxide in iron-making workshops of the blast furnace, improving the utilization rate of blast furnace gas, reducing the emission of carbon dioxide, and having significant social and environmental benefits.

Description

technical field [0001] The invention belongs to the fields of iron and steel metallurgy and greenhouse gas emission reduction, relates to a method and device for capturing, separating, recycling and recycling carbon dioxide in blast furnace gas, and provides an energy-saving technology for improving the gas energy of blast furnace gas and reducing carbon dioxide emissions. Background technique [0002] Energy and environmental issues are becoming the focus of global and regional attention, and the issue of greenhouse gas emissions has been brought to the forefront. 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, among which carbon dioxide emissions from the thermal power generation industry ...

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Problems solved by technology

[0004] At present, there is no specific process technology for the separation and recovery of carbon dioxide gas in blast furnace gas in my country, and it is still in the stage of theoretical research. The removal of carbon dioxide in the chemical industry has been partially industrialized. Based on the different concentrations of carbon dioxide in the treated gas, the removal methods are also different. There are mainly absorption method, adsorption method, condensation, membrane separation and other methods.

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