文章摘要
任 勇,折鹏飞,吴振山,陈天佼,陈 海,周新桥,赵 樊,方 鹏,陶东光,吴朋朋.某特种水泥熟料生产线脱硝工艺选择的探讨[J].水泥工程,2024,37(3):25-29
某特种水泥熟料生产线脱硝工艺选择的探讨
Discussion on the selection of denitrification process for a special cement clinker production line
  
DOI：
中文关键词: SCR脱硝,精准脱硝,气化炉,热碳还原,特种水泥,氨氮比
英文关键词: SCR denitrification,accurate denitrification,gasifier, thermal carbon reduction, special cement, ammonia nitrogen ratio
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作者单位
任 勇 枣庄市工程建设监理有限公司 
折鹏飞 肥华创碧蓝科技有限公司 
吴振山 北京东方国信科技股份有限公司 
陈天佼 北京东方国信科技股份有限公司 
陈 海 北京东方国信科技股份有限公司 
周新桥 肥华创碧蓝科技有限公司 
赵 樊 北京东方国信科技股份有限公司 
方 鹏 肥华创碧蓝科技有限公司 
陶东光 北京东方国信科技股份有限公司 
吴朋朋 肥华创碧蓝科技有限公司 
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中文摘要:
      某特种水泥熟料生产线在“窑头低氮燃烧+分解炉分级燃烧”同时作用下的单位熟料NOx产量为5.52 kg/t，理论推算即使“LNB+SCC+SNCR+SCR”的组合脱硝也不能同时满足NOx超净排放且单位熟料氨耗≤4 kg/t的刚性指标。本文遴选出“LNB+SCC+热碳还原+高效SNCR+高温低尘SCR”的组合脱硝工艺可满足政策要求。实施后NOx排放浓度能够精准调控到45±5 mg/m3，单位熟料NOx消减5.38 kg/t，是常规水泥窑脱硝过程单位熟料NOx消减量的3.64倍，预期单位熟料氨耗2.69 kg/t，单位熟料煤耗增加1.36 kg/t，单位熟料电耗增加2.68 kWh/t，单位熟料脱硝综合运行成本由当前的9.31元/t降至7.27元/t，年脱硝运营费用节约113万元。
英文摘要:
      The unit NOx output of a special cement clinker production line under the simultaneous action of "low nitrogen combustion at the kiln head+staged combustion in the decomposition furnace" is 5.52 kg/t. Theoretical calculations show that even the combination of "LNB+SCC+SNCR+SCR" for denitrification cannot simultaneously meet the rigid index of NOx ultra net emissions and unit ammonia consumption of clinker ≤ 4 kg/t. The combination denitrification process of "LNB+SCC+thermal carbon reduction+efficient SNCR+high-temperature and low dust SCR" is selected to meet policy requirements. After implementation, the NOx emission concentration can be precisely controlled to 45 ± 5 mg/m3, and the NOx reduction per unit clinker is 5.38 kg/t, which is 3.64 times the NOx reduction per unit clinker in the conventional cement kiln denitrification process. It is expected that the ammonia consumption per unit clinker will be 2.69 kg/t, the coal consumption per unit clinker will increase by 1.36 kg/t, and the electricity consumption per unit clinker will increase by 2.68 kWh/t. The comprehensive operating cost per unit clinker denitrification will be reduced from the current 9.31 yuan/t to 7.27 yuan/t, and the annual denitrification operating cost will be saved by 1.13 million yuan.
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