钢铁副产煤气资源化利用技术及效益分析
Technologies and comprehensive benefit analysis for resource utilization of steel by-product gases
探讨了钢铁行业副产煤气的资源化利用路径,提出“钢化联产”的绿色产业链构建方案。针对年产1 000万t钢焦融合企业,通过煤气平衡测算得出可优化转炉煤气13亿m3/a、焦炉煤气16亿m3/a。研究设计了以副产煤气为原料生产甲醇、醋酸、双氧水和乙二醇的技术路线,并进行了成本效益分析。数据显示,焦炉煤气制甲醇较煤制甲醇成本降低24%,转炉煤气制乙二醇成本较煤制降低1 010元/t,醋酸及双氧水成本分别降低318、145元/t,典型项目投资回收期在1~2 a间,展现了显著的经济优势。研究验证了钢化联产模式在资源整合、成本控制和环境效益方面的多重价值,为钢铁企业提升产品附加值提供了可行路径。
This study explores the resource utilization pathways of by-product gases in the steel industry,proposing a green industrial chain construction scheme through “steel-chemical integrated processes”.Targeting an integrated steel-coking company with an annual output of 10 million tons of steel,gas balance calculations reveal optimizable resources of 1.3 and 1.6 billion Nm3/year converter gas and coke oven gas,respectively.A technical route utilizing these gases to produce methanol,acetic acid,hydrogen peroxide,and ethylene glycol was designed,accompanied by cost analysis.Data indicate that methanol production from coke oven gas reduces costs by 24% compared to coal-based method.For ethylene glycol derived from converter gas,the cost reduction reaches 1 010 CNY/ton versus coal-based routes.Similarly,cost savings for acetic acid and hydrogen peroxide stand at 318 CNY/ton and 145 CNY/ton,respectively.Typical projects demonstrate a payback period of 1-2 years,highlighting significant economic advantages.The research validates the multidimensional value of steel-chemical co-production in resource integration,cost control,and environmental benefits,providing a viable pathway for steel enterprises to enhance product added value.
steel-chemical co-production / by-product gases / methanol / ethylene glycol / cost analysis
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