摘要
一些火电厂的烟气脱硝系统因SCR装置喷氨量分布不合理,致使其出口NOx浓度分布偏差大,局部氨逃逸浓度过大。对此,以某台300MW机组SCR装置为例,通过喷氨量分布优化调整,使SCR装置出口NOx浓度分布的相对标准偏差由优化前的45%下降为10%,平均氨逃逸浓度由1.7μL/L下降为0.98μL/L,SCR系统的最大脱硝效率由80%提高到88%。
Unreasonable distribution of ammonia injection quantity in SCR equipment of some domestic power plants caused large deviation of outlet NOx concentration,and too high escaped ammonia content at local regions.Thus,adjustment of ammonia injection quantity for SCR system on a 300 MW unit was conducted.After the optimization,NOx distribution at the outlet of the system was improved significantly,and the peak value of escaped ammonia decreased.Besides,the relative standard deviation of NOx distribution dropped from 45%(before the optimization) to 10%,and the average concentration of escaped ammonia reduced from 1.7 μL/L to 0.98 μL/L.Moreover,the maxium denitration efficiency of the SCR system increased from 80% to 88%.
出处
《热力发电》
CAS
北大核心
2012年第7期81-83,共3页
Thermal Power Generation
关键词
300
MW机组
烟气脱硫
SCR装置
喷氨优化
氨逃逸浓度
脱硝效率
300 MW unit
SCR equipment
ammonia injection
optimization
escaped ammonia concentration
maximum de-NOx efficiency