水泥炉窑氮氧化物排放控制最新研究进展  

Recent Research Progress in NOx Emissions Control in Cement Kiln

作　　者：李森[1,2] Li Sen(State Key Laboratory of High Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China;School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院力学研究所高温气体动力学国家重点实验室,北京100190 [2]中国科学院大学工程学院,北京100049

出　　处：《燃烧科学与技术》2020年第5期383-390,共8页Journal of Combustion Science and Technology

基　　金：国家重点研发计划资助项目(2016YFB0601503).

摘　　要：针对水泥炉窑工艺特点和氮氧化物生成特点,分析了水泥炉窑现有NOx排放控制技术的局限性,总结了近年来水泥炉窑NO_x控制影响机制最新研究进展以及高效脱硝技术最新应用.水泥分解炉炉内或炉外煤气化低氮燃烧技术,充分利用CaO固相催化CO还原NOx特性,实现了高效低氮燃烧;水泥分解炉首尾喷氨SNCR高效脱硝解决了CaO对脱硝抑制问题,并防止了大量氨逃逸;由于水泥窑炉烟气碱金属含量高,为了防止催化剂中毒和堵塞,SCR脱硝技术在水泥炉窑的应用还需要进一步完善;水泥炉窑O2/CO2燃烧技术和液态催化剂脱硝技术具有良好的应用前景.According to the characteristics of cement kiln process and NOx formation,the limitations of existing control technologies of NOx emission were analyzed.Recent research progress in NOx control mechanism and the application of high-efficiency denitrification technology were summarized.With CaO catalytic reaction fully used,high-efficiency and low-NOx combustion is realized through coal gasification inside or outside a cement calciner.With high-efficiency denitration of selective non catalytic reduction at the head and tail of cement calciner,the problem of CaO inhibiting denitration is solved and ammonia escape is prevented.Due to the highcontent alkali metal in the flue gas of the cement kiln,which can easily result in the catalyst poisoning and blockage,further improvement needs to be made on the denitration technology of selective catalytic reduction.The O2/CO2 combustion technology of cement kiln and the liquid denitration catalyst technology have great application prospects.

关 键 词：水泥炉窑 氮氧化物 水泥分解炉 

分 类 号：X511[环境科学与工程—环境工程]