Method for separating, reclaiming and recycling CO2 in gas of blast furnace and converter

Abstract

The invention relates to a method for separating, reclaiming and recycling CO2 in gas of a blast furnace and a converter respectively, belongs to the fields of ferrous metallurgy and greenhouse gas discharge reduction, and provides an energy-saving technique for improving the mass energy of the gas and reducing the discharge of CO2. The method integrates and optimizes the reclamation and recycle of the gas of the blast furnace and the converter; the reclamation and separation of the CO2 in the gas are executed by a gas treatment system, an absorption tower and a regeneration tower with a built-in boiler, and a chemical absorption system is additionally provided; and the reclaimed CO2 and partial external CO2 can be used for blasting in a hot-blast stove of the blast furnace and carrying gas for injection fuel, and the reclaimed CO2 also can be used for replacing N2 to carry out slag splashing protection for the converter. The method realizes the recycle of the CO2 during iron making in the blast furnace and steel making in the converter, also can use the external CO2 reclaimed from the industrial waste gas in the industries of power, chemical engineering and the like, reduces the discharge of the CO2, realizes an environment-friendly steel production process, and has remarkable 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 an energy-saving and emission-reduction technology in the iron and steel production process, and provides a method for CO in blast furnace gas and converter gas. 2 Separation, recovery, and recycling methods can improve gas energy and reduce CO 2 emission. Background technique [0002] 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. my country's steel industry CO 2 Emissions account for about 50% of the world's steel industry, from CO 2 Looking at the resulting industry, about 50% of the CO 2 Emissions come from industrial production, of which CO from the iron and steel industry 2 The emissions of the domestic iron and steel industry rank second. 2 Emissions account for about 14% of...

AI Technical Summary

Problems solved by technology

[0013] At present, my country has not yet targeted CO2 in blast furnace and converter gas. 2 The specific process technology of separation and recovery is still in the stage of theoretical research. The present invention recovers and separates CO in blast furnace and converter gas. 2 , mainly focusing on reducing CO 2 emissions and CO 2 Circulation is used for blast furnace injection and converter slag splashing to protect the furnace, improve gas energy, increase gas utilization rate, realize gas recycling in blast furnace and converter workshops, effectively reduce greenhouse gas emissions, and relieve environmental pressure

Images