Study on Performance Optimization of SCR Denitrification of an Ultra-low Emission Coal-fired Power Unit

2018 2nd International Conference on Power and Energy Engineering

Li, Bing^1 ; Song, Yongqiang^2 ; Zhang, Qilong^1 ; Zhou, Can^1 ; Duan, Haoran^1

Huadian Electric Power Research Institute Co., LTD., Jinan, China^1

Huadian Power International Corporation Limited Zouxian Power Plant, Jining, China^2

关键词: Ammonia injection;    Coal-fired power unit;    Concentration distributions;    Distribution uniformity;    Flue gas temperatures;    Performance optimizations;    Relative standard deviations;    SCR denitrifications;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/192/1/012060/pdf
DOI  :  10.1088/1755-1315/192/1/012060

来源: IOP

【 摘 要 】

The distribution of NOx concentration, flue gas flow field and temperature at the inlet and NOx concentration at the outlet of SCR denitrification were measured in a 330MW ultra-low emission coal-fired power unit, and ammonia injection optimization was carried out to improve the performance of SCR denitrification. The test results show that the distribution of NOx concentration and flue gas temperature at the inlet of SCR reactor is relatively uniform, and the distribution of flue gas flow field at the inlet of SCR reactor is nonuniform. The distribution uniformity of NOx concentration at the outlet of SCR reactor is poor before optimization. The NOx concentration distribution at the outlet of SCR reactor is improved by ammonia injection adjustment, and the relative standard deviation of NOx concentration distribution at the outlet of SCR reactor A and B decrease from 48.7% and 33.8% to 12.1% and 14.7%, respectively.