摘要
在“双碳”政策的大环境下,烧结烟气逐步成为钢铁行业节能减排的关注点。对烧结烟气中的CO和NO进行了研究,分析了烧结烟气中CO和NO的生成机理,并从源头削减和末端治理方面分析总结了目前烧结烟气中CO和NO单独脱除的方法。目前中国在绿色低碳发展方面的要求较为严格,单独脱除往往存在能耗高、成本高等问题,而烧结烟气中的CO还原NO具有良好的热力学及动力学条件,脱除产物也不会造成二次污染。为此,综述了烧结烟气中CO与NO的协同控制方法,指出了采用CO-SCR法和烧结烟气循环法催化CO还原NO均具有良好的控制效果,明确了推进低温高效催化剂的工业化发展和深入研究烧结烟气循环中铁酸钙的催化机理是烧结烟气协同控制未来发展的趋势。
Under the environment of carbon peaking and carbon neutrality policy,sintering flue gas has gradually become the focus of energy conservation and emission reduction in iron and steel industry.CO and NO in the sintering flue gas are studied,the formation mechanism of CO and NO in the sintering flue gas is analyzed,and the current methods for the separate removal of CO and NO from the sintering flue gas are analyzed and summarized from the aspects of source reduction and terminal treatment.At present,China′s requirements for green and low-carbon development are relatively strict,and there are often problems such as high energy consumption and high cost in separate removal,while the reduction of NO by CO in sintering flue gas has good thermodynamic and kinetic conditions,and the removal products will not cause secondary pollution.The synergistic control methods of CO and NO in sintering flue gas are reviewed.Both the CO-SCR method and the sintering flue gas circulation method have good control effects on the reduction of NO by catalytic CO.The catalytic mechanism of calcium ferrite is the future development trend of synergistic control for sintering flue gas.
作者
李杰
郝鑫涛
赵欣锋
张遵乾
杨爱民
杨强
LI Jie;HAO Xintao;ZHAO Xinfeng;ZHANG Zunqian;YANG Aimin;YANG Qiang(School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,Hebei,China;School of Science,North China University of Science and Technology,Tangshan 063210,Hebei,China)
出处
《中国冶金》
CAS
CSCD
北大核心
2023年第8期17-24,共8页
China Metallurgy
基金
唐山市重点研发计划项目(22150232J)。
关键词
烧结烟气
一氧化碳
一氧化氮
协同控制
催化还原
sintering flue gas
carbon monoxide
nitric oxide
synergistic control
catalytic reduction
