摘要
分析了水泥窑烟气特性和SCR脱硝系统运行后对水泥窑及余热发电系统的影响,针对实施SCR脱硝的难点,确定采用“高温高尘”SCR脱硝工艺技术路线,以实现窑尾氮氧化物的超低排放。采用“高温高尘”SCR脱硝系统工艺方案,氮氧化物排放浓度可从300mg/Nm3降低至45mg/Nm3,达到超低排放要求,氨逃逸浓度<5mg/Nm3,吨熟料生产成本预计增加4.25元,余热发电系统总发电量预计减少0.67%。
The flue gas characteristics of cement kiln and the influence of SCR denitration system on cement kiln and waste heat power generation system were analyzed.In view of the difficulties in imple⁃menting SCR denitration,the technical route of"high temperature and high dust"SCR denitration pro⁃cess was determined to achieve ultra-low emission of nitrogen oxides at the kiln tail.Using"high tem⁃perature and high dust"SCR denitration system process scheme,nitrogen oxide emission concentra⁃tion can be reduced from 300mg/Nm3 to 45mg/Nm3,to meet the requirements of ultra-low emission,ammonia escape concentration<5mg/Nm3,tons of clinker production cost is expected to increase 4.25 yuan,the total power generation of waste heat power generation system is expected to reduce 0.67%.
作者
张冬冬
王朝雄
ZHANG Dongdong;WANG Chaoxiong(Nanjing Kesen Kainen Environment&Energy Co.,Ltd.,Nanjing Jiangsu 210036,China)
出处
《水泥技术》
2023年第2期32-36,共5页
Cement Technology
