摘要
W型火焰炉在我国西南片区应用较为广泛,但因炉型、燃烧及燃煤条件的不同,W型火焰炉的NO_(x)排放量高于其他形式锅炉,通常达到1000 mg/Nm^(3)以上。为保证W型火焰炉NO_(x)排放量满足超低排放标准要求,单纯依靠SCR脱硝技术难度较大,需采用辅助脱硝技术降低SCR脱硝运行压力,确保脱硝系统运行稳定,氨逃逸控制在合理范围内。对比分析2种辅助脱硝降低W型火焰炉NO_(x)排放量的技术进行技术及经济效益,为W型火焰炉脱硝超低排放实现提供技术借鉴。辅助脱硝技术选择需因厂制宜,综合考虑机组寿命、机组负荷、NO_(x)浓度、运行时间等,从而确定合理的技术路线。
The W flame boilers are widely used in southwestern,but due to different boiler types,combustion and coal conditions,the NO_(x)emission concentration of W flame boilers are naturally higher than other types of boilers which usually reaches above 1000 mg/Nm^(3).In order to meet the requirements of ultra-low emission standard for NO_(x)emission concentration of W-type flame furnace,it is difficult to rely solely on SCR denitrification technology.It was necessary to adopt auxiliary denitrification technology to reduce the operating pressure of SCR denitrification to ensure stable operation of the denitrification system and ammonia escape within reasonable control.The technology and economy of two assistant denitrification technologies to reduce the concentration of NO_(x)emission from W-type flame furnace were compared and analyzed,which can provide technical reference for the realization of ultra-low emission of denitrification from W-type flame furnace.The selection of specific auxiliary denitrification technology should be based on plant conditions,and comprehensive consideration of unit life,unit load,NO_(x)concentration,operating time,etc.,to determine a reasonable technical route.
作者
高如云
韦飞
GAO Ruyun;WEI Fei(Shanxi Luneng Hequ Power Generation Co.,Ltd.,Xinzhou 036500,China;State Power Environmental Protection Research Institute Co.,Ltd.,Nanjing 210031,China)
出处
《洁净煤技术》
CAS
北大核心
2021年第S02期304-307,共4页
Clean Coal Technology
基金
国家重点研发计划资助项目(2017YFC0210203)
关键词
W型火焰炉
辅助脱硝
超低NO_(x)排放
经济性
W-type flame boiler
auxiliary denitration
the ultra-low NO_(x)emission
economical efficiency
