化工学报2024，Vol.75Issue(6)：2344-2352,9.DOI:10.11949/0438-1157.20231163
高炉喷吹重整焦炉气工艺分析及减碳潜力研究
Study on the carbon reduction potential of blast furnace injection process using reformed coke oven gas
摘要
Abstract
The iron and steel industry accounts for 14%—18%of the total carbon emissions in China,making it the highest emitting sector in the industrial field.The blast furnace-basic oxygen furnace process contributes to 89%of the total steel production in China.This process is characterized by a long flow path and emits 2 tons of carbon per ton of steel produced.Carbon emission reduction based on the blast furnace-converter process is key to the steel industry's decarbonization goals.Based on the energy balance model,this study focuses on analyzing the impact of using coke oven gas and reformed coke oven gas for blast furnace injection on process parameters such as direct reduction degree and theoretical coke ratio.It aims to systematically evaluate the potential carbon dioxide emission reduction benefits of this approach.The results indicate that increasing the injection volume and temperature of hydrogen-rich gas effectively reduces coke consumption.However,under the same injection volume conditions,increasing the hydrogen purity leads to a slight increase in coke consumption due to heat compensation.When the coke oven gas is reformed to yield hydrogen gas with a purity of 97.9%,a carbon reduction of 34.62%in the blast furnace can be achieved.Compared to direct injection of coke oven gas,the potential for carbon reduction is increased by 17.76%.The carbon reduction mainly stems from the decrease in coke consumption and the reduced carbon content in the injected gas.Power generation from blast furnace gas is also a crucial step in carbon reduction.When the hydrogen purity of the injected gas is increased from 59%to 97.9%,the carbon reduction potential in this step is improved from 9.04%to 10.85%.The reformation of coke oven gas in the blast furnace injection process has the potential to surpass the upper limit of carbon reduction achievable with hydrogen-rich gas,making it a promising approach with potential for widespread implementation.关键词
模型/焦炉气/二氧化碳/氢/碳减排Key words
model/coke oven gas/carbon dioxide/hydrogen/carbon emission reduction分类
矿业与冶金引用本文复制引用
常成功,宋皓楠,雷飞霞,狄子琛,程芳琴..高炉喷吹重整焦炉气工艺分析及减碳潜力研究[J].化工学报,2024,75(6):2344-2352,9.基金项目
山西省科技战略研究专项(202204031401048) （202204031401048）
山西省基础研究计划项目(202103021223027) （202103021223027）
山西省留学人员科技活动择优资助项目(20220003) （20220003）
山西省研究生教育创新项目(2022Y152) （2022Y152）
