摘要
在超低排放要求下,选择性催化还原脱硝反应器产生的逃逸氨易造成空气预热器堵塞和腐蚀。结合现场试验和数值模拟发现:对象机组的烟气流量分布与氨(还原剂)流量分布明显不均匀,直接造成脱硝反应器出口逃逸氨超标。设计一种全负荷自适应的精准喷氨系统并投入工程应用。与初始喷氨系统相比,新系统实现全负荷段下氨逃逸平均降低75.4%,喷氨量平均降低14.4%。
To meet ultra-low emission requirements, the escaping ammonia produced by selective catalytic reduction(SCR) denitrification reactor could cause the air preheater blockage and corrosion. Combined field tests with numerical simulation analysis, the non-uniform distribution of flue gas and ammonia directly produces excessive escaping ammonia.A self-leveling precise ammonia system for wide-load is designed and applied in engineering. Compared with the initial ammonia system, this new system reduces the escaping ammonia by 75.4% and the ammonia consumption by 14.4% on average.
作者
范辰浩
尚天坤
吕晓东
王健
全文涛
唐丁玲
FAN Chen-hao;SHANG Tian-kun;LV Xiao-dong(Shanghai Minghua Electric Power Science&Technology Co.,Ltd.)
出处
《电站系统工程》
2020年第6期63-66,共4页
Power System Engineering
关键词
SCR脱硝
自适应
精准喷氨系统
氨逃逸
selective catalytic reduction
self-leveling
precise ammonia system
escaping ammonia
