Study on Optimization Experiment of SCR Denitrification Technologies in a Coal-fired Power Plant

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Limeng^1 ; Dong, Xinguang^1 ; Hou, Fanjun^1 ; Liu, Ke^1 ; Che, Gang^2

Stat Grid Shandong Electric Power Research Institute, Ji'nan

250002, China^1

Shandong ZHONGSHI YITONG GROUP, Ji'nan

250002, China^2

关键词: Ammonia injection;    Coal-fired power plant;    Concentration distributions;    Concentration fields;    Distribution uniformity;    Downstream equipment;    Relative standard deviations;    SCR denitrifications;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/5/052100/pdf
DOI  :  10.1088/1755-1315/108/5/052100

来源: IOP

【 摘 要 】

Optimization experiment of SCR denitrification technologies on a 300MW unit was conducted. Adjustment of ammonia injection quantity of corresponding AIG was conducted after measuring the SCR export NOx concentration field in 250MW load, the distribution uniformity of NOx volume fraction at the outlet of both reactor A and B was improved significantly, where the relative standard deviation of NOx reduced respectively from 29.83% to 13.01% and 24.54% to 9.26%, simultaneously, the amount of ammonia escape of A, B reactor decrease respectively by 24.76%, 19.45%. The results of optimization experiment show that, optimal adjustment can improve the NOx concentration distribution, reduce the amount of ammonia escape in a certain extent, and judge whether the catalytic activity of the regional catalyzer is in good condition. As to the area where catalyst is ineffective, the effect of optimization experiment is limited, the catalyzer should be the timely replacement, so as to better protect downstream equipment.