Design of Splitters in Flue of SCR System for a 6U Mw Coal-fired Boiler
[1]WANG Wei-shu,SHAGN GUAN Shan-shan,LU Tong,et al.Design of Splitters in Flue of SCR System for a 6U Mw Coal-fired Boiler[J].Journal of Zhengzhou University (Engineering Science),2015,36(04):37-40.[doi:10.3969/ j.issn.1671 -6833.2015.04.009]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
36
Number of periods:
2015 04
Page number:
37-40
Column:
Public date:
2015-08-31
- Title:
- Design of Splitters in Flue of SCR System for a 6U Mw Coal-fired Boiler
- Keywords:
- SCR; flow field ; splitters; optimization
- CLC:
- -
- DOI:
- 10.3969/ j.issn.1671 -6833.2015.04.009
- Abstract:
- Based on FLUENT6.3 software，the simulation and analysis were applied to the optimization designof splitters in Selective Catalytic Reduction ( SCR ) denitrification system for a 600MW coal-fired boiler. Theresults show that because of variable cross-section and deflection in flue,flow field in the system appears non-uniform severely when there is no splitters. The velocity difference on two sides of the section at AlG lowerreaches is up to 15 m/s，the velocity deviations in the reactor inlet is 31.25% , and the flow field is poor intail flue，which affects the operation of downstream equipments.Reasonable splitters can improve flow field influe effectively. After equipping the transition pipe of the inlet with two group of longitudinal splitters, the ve-locity deviations in section at AIG lower reaches is reduced to 15% and in the reactor inlet is reduced to 13% .Splitters in elbow is equipped with an extension for guiding，which have a good effect on homogenization of thedownstream flow field.
- References:
-
[1]杨超,张杰群,郭婷婷． SCR烟气脱硝装置烟气流场数值模拟[J]．东北电力大学学报, 2012,32 ( 1) :66 -70.[2]贾兴豪,弯管导流结构的优化和数值模拟研究[ D]．重庆:重庆大学资源及环境科学学院，2011.[3]张彦军,高翔,骆仲涣,等． SCR脱硝系统入口烟道设计模拟研究[J]．热力发电,2007, 36 ( 1 ) : 15 -17,23.
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