Volume 8 Issue 3
May  2018
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Article Navigation >  Journal of Environmental Engineering Technology  > 2018  >  8(3): 326-332
XIAO Yujun, ZOU Yihui, ZHOU Xuebin, LI Caiting, ZHANG Wei, JIANG Sennian, LI Yang. Influence of performance and installation of ammonia spray branch pipes on uniformity distribution of NOx at the exit[J]. Journal of Environmental Engineering Technology, 2018, 8(3): 326-332. doi: 10.3969/j.issn.1674-991X.2018.03.043
Citation: XIAO Yujun, ZOU Yihui, ZHOU Xuebin, LI Caiting, ZHANG Wei, JIANG Sennian, LI Yang. Influence of performance and installation of ammonia spray branch pipes on uniformity distribution of NOx at the exit[J]. Journal of Environmental Engineering Technology, 2018, 8(3): 326-332. doi: 10.3969/j.issn.1674-991X.2018.03.043
shu

Influence of performance and installation of ammonia spray branch pipes on uniformity distribution of NOx at the exit

doi: 10.3969/j.issn.1674-991X.2018.03.043

  • 1. China Energy Engineering Group Central China Electric Power Test and Research Institute Co.,Ltd., Changsha 410005, China

  • 2. College of Environmental Science and Engineering, Hunan University, Changsha 410082, China

  • 3. School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410076, China

More Information
  • Corresponding author: Wei ZHANG E-mail: alvin_zw@126.com
  • Received Date: 2017-12-11
  • Publish Date: 2018-05-20
    Abstract
  • Aiming at the different performances of SCR system owing to different structures of the flue and the ammonia-injection grid under the requirements of ultra clean emissions, the performances of typical SCR devices were analysed and optimized by testing and adjustment. The influence of branch pipe installation on the uniformity distribution of NOx at the exit was contrastively analysed, and the performances of ammonia spray branch pipes studied by the numerical simulation. The results showed that the relative standard deviations (RSDs) of inlet flue gas velocity distribution of the A, B sides of Test Device 1 were 12.4% and 14.4%, respectively. However, the performance and installation of the ammonia spray branch pipes before optimization could not realize in the NOx uniformity distribution in the depth direction of the exit cross section. After optimization, the partition control in the horizontal and vertical direction of the ammonia-injection grid system resulted in the uniform mixing of ammonia-nitrogen in Test Device 1, with the RSD of its outlet speed of 6.9%. In Test Device 2, the RSDs of the inlet flue gas velocity distribution and the outlet velocity distribution of the ammonia spray branch pipes were 27.8% and 23.7%, respectively. But, the RSD of NOx on the exit cross section was 16.3%, as a result of correct installation of ammonia spray branch pipes.

     

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