Research for Optimized Adjustment Tests of Ammonia Injection in SCR Denitrification System
There were some problems such as uneven NOx distribution of SCR outlet and excessive ammonia escape which were caused by the disaccord between regional ammonia injection and NOx distribution in flue gas in SCR denitrification system,seriously affecting the SCR efficiency.The data of thorough test for No.2 unit of a power plant in Shandong indicated that the NOx in SCR inlet was well-distributed under 3 load conditions of 305 MW,250 MW and 170 MW,but the NOx distribution in SCR outlet represented poor uniformity.The maximum unevenness reached 64.8％ ,the average was 53.0％ ,and the maximum deviation of NOx concentration was 73 mg/m3,the average values of ammonia escape were 2.10 mg/m3,2.24 mg/m3,2.40 mg/m3.After optimization and adjustment of ammonia injection,the unevenness of N Ox distribution in SCR outlet was significantly lower,the maximum unevenness was 18.9％ .the average was 18.5％ ,and the maximum deviation of NOx concentration was 24 mg/m3,the average values of ammonia escape were 1.55 mg/m3,1.61 mg/m3,1.80 mg/m3,the effect of optimization was appreciable.
SCRoptimization and adjustment of ammonia injectionunevennessammonia escape
万方数据
维普
