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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    • References(24)
  • [1]
    环境保护部. 火电厂大气污染物排放标准: GB 13223—2011[S].北京:中国环境科学出版社, 2011.
    [2]
    环境保护部, 国家发展和改革委员会, 国家能源局 .关于印发《全面实施燃煤电厂超低排放和节能改造工作方案》的通知[A/OL].( 2015 -12-11)[2017-10-25] http://www.zhb.gov.cn/gkml/hbb/bwj/201512/t20151215_319170.htm?_sm_au_=iVVR2PCFSksVLj6H#.
    [3]
    郭婷婷, 刘汉强, 杨勇平 , 等. 基于数值模拟的1 000 MW燃煤机组SCR脱硝系统设计[J]. 电站系统工程, 2010,26(5):61-64.
    doi: 10.3969/j.issn.1005-006X.2010.05.024

    GUO T T, LIU H Q, YANG Y P , et al. SCR system design based on numerical simulation of 1 000 MW coal-fired station[J]. Power System Engineering, 2010,26(5):61-64. doi: 10.3969/j.issn.1005-006X.2010.05.024
    [4]
    肖育军, 陶莉, 符思聪 , 等. 脱硝系统烟气流场的性能与优化[J]. 环境工程学报, 2016,10(8):4407-4413.
    doi: 10.12030/j.cjee.201503038

    XIAO Y J, TAO L, FU S C , et al. Performance and optimizing of smoke flow in the denitration system[J]. Chinese Journal of Environmental Engineering, 2016,10(8):4407-4413. doi: 10.12030/j.cjee.201503038
    [5]
    毛剑宏, 蒋新伟, 钟毅 , 等. 截面倾斜烟道导流板对AIG入口流场影响[J]. 浙江大学学报(工学版), 2011,45(8):1454-1457.
    doi: 10.3785/j.issn.1008-973X.2011.08.021

    MAO J H, JIANG X W , ZHONG Y,et al.The effect of splitters layout at variable cross-section inclined flue on AIG inlet flow field[J]. Journal of Zhejiang University(Engineering Science), 2011,45(8):1454-1457. doi: 10.3785/j.issn.1008-973X.2011.08.021
    [6]
    蒋新伟 . 变截面烟道SCR烟气脱硝反应器整流装置的优化研究[D]. 杭州:浙江大学, 2010.

    JIANG X W . Optimization study on reactying device of SCR reactor with variable cross-section flue[D]. Hangzhou:Zhejiang University, 2010.
    [7]
    毛剑宏 . 大型电站锅炉SCR烟气脱硝系统关键技术研究[D]. 杭州:浙江大学, 2011.

    MAO J H . Key technology study of SCR flue gas DeNOx system in large power plant boiler[D]. Hangzhou:Zhejiang University, 2011.
    [8]
    ROGERS K, THOMPSON C. Development and performance data for ammonia injection and gas mixing process on SCR applications [C]//Combined Power Air Pollutant Control Mega Symposium.Washington DC:[s.n.], 2004: 665-687.
    [9]
    董建勋, 于遂影, 祁宁 , 等. 火电厂SCR脱硝反应器均流与混合技术试验研究[J].热力发电, 2006(10):70-73.
    doi: 10.3969/j.issn.1002-3364.2006.10.023

    DONG J X, YU S Y, QI N , et al. Test study on flow uniformizing and reductant mixing technology in SCR denitrification reactor for thermal power plants[J].Thermal Power Generation, 2006(10):70-73. doi: 10.3969/j.issn.1002-3364.2006.10.023
    [10]
    MUNCY J, SHORE D, MARTZ T,et al.Interlayer mixing for improved SCR performance [C]//Environmental Controls Conference.Pittsburgh:National Energy Technology Laboratory, 2006.
    [11]
    LEI Z G, WEN C P, CHEN B H . Optimization of internals for selective catalytic reduction(SCR) for NO removal[J]. Environmental Science & Technology, 2011,45:3437-3444.
    doi: 10.1021/es104156j pmid: 21381660
    [12]
    刘晓敏 . 烟气脱硝SCR装置喷氨优化研究[J]. 热力发电, 2012,41(7):81-83.
    doi: 10.3969/j.issn.1002-3364.2012.07.081

    LIU X M . Optimization of ammonia injection for SCR equipment[J]. Thermal Power Generation, 2012,41(7):81-83. doi: 10.3969/j.issn.1002-3364.2012.07.081
    [13]
    BUZANOWSKI M, MARK A, FADDA D. Optimized ammonia injection for power plant SCR systems [C]//Proceedings of ASME Power Conference.Baltimore:American Society of Mechanical Engineers, 2007: 493-496.
    [14]
    吴学智, 聂会建, 鞠付栋 , 等. SCR脱硝系统不均匀喷氨方案的数值模拟研究[J]. 电力科技与环保, 2014,30(5):26-29.
    doi: 10.3969/j.issn.1674-8069.2014.05.009

    WU X Z, NIE H J, JU F D , et al. CFD simulation study of nonuniform ammonia injection in SCR denitrification system[J]. Electric Power Technology and Environmental Protection, 2014,30(5):26-29. doi: 10.3969/j.issn.1674-8069.2014.05.009
    [15]
    徐妍, 李文彦 . SCR脱硝反应器导流板的结构设计[J].热力发电, 2008(10):49-52.

    XU Y, LI W Y . Structure design of baffle plates in SCR denitrification reactor[J].Thermal Power Generation, 2008(10):49-52.
    [16]
    董建勋, 李辰飞, 王松岭 , 等. 还原剂分布不均匀对脱硝性能影响的模拟分析[J]. 电站系统工程, 2007,23(1):20-21.

    DONG J X, LI C F, WANG S L , et al. Simulation of effect of non-uniformity of reagent distribution on SCR deNOx performance[J]. Power System Engineering, 2007,23(1):20-21.
    [17]
    方朝君, 金理鹏, 宋玉宝 , 等. SCR脱硝系统喷氨优化及最大脱硝效率试验研究[J]. 热力发电, 2014,43(7):158-160.

    FANG C J, JIN L P, SONG Y B , et al. Performance optimization and maximum denitration efficiency analysis for SCR-DeNOx power plants[J]. Thermal Power Generation, 2014,43(7):158-160.
    [18]
    陈明, 王登香, 张济显 . 脱硝系统氨逃逸率大对空预器的影响及防治措施[J]. 华东电力, 2014,42(6):1267-1270.

    CHEN M, WANG D X, ZHANG J X . Influence of denitrification system high ammonia escape rate on air preheater and prevention measures[J]. East China Electric Power, 2014,42(6):1267-1270.
    [19]
    周英贵, 金保升 . 基于非均匀入口条件的SCR氨喷射方法[J]. 华中科技大学学报(自然科学版), 2016,44(4):121-126.

    ZHOU Y G, JIN B S . Ammonia injection method for SCR based on non-uniform inlet condition[J]. Huazhong University of Science and Technology(Natural Science Edition), 2016,44(4):121-126.
    [20]
    QU L, LI C T, ZENG G M , et al. Support modification for improving the performance of MnOx-CeOy/γ-Al2O3 in selective catalytic reduction of NO by NH3[J]. Chemical Engineering Journal, 2014,242:76-85.
    doi: 10.1016/j.cej.2013.12.076
    [21]
    王乐乐, 周健, 姚友工 . 烟气脱硝SCR氨喷射系统调整效果评估[J]. 中国电力, 2015,48(4):16-22.
    doi: 10.11930.2015.4.16

    WANG L L, ZHOU J, YAO Y G . Evaluation on effects of SCR ammonia injection system modification for flue gas denitrification[J]. Electric Power, 2015,48(4):16-22. doi: 10.11930.2015.4.16
    [22]
    Fluent lnc . Fluent User’s Guide[M]. Washington DC:Fluent lne, 2003.
    [23]
    胡劲逸 . 基于氨逃逸浓度场的SCR喷氨协调优化控制[D]. 杭州:浙江大学, 2015.

    HU J Y . Optimization and adjustment of SCR ammonia injection based on ammonia escape concentration field[D]. Hangzhou:Zhejiang University, 2015.
    [24]
    肖育军, 吴仁军, 陶莉 , 等. SCR系统超洁净排放调整与出口NOx均匀性分析[J]. 环境工程学报, 2017,11(9):5123-5129.

    XIAO Y J, WU R J, TAO L , et al. Ultra clean emissions adjustment and uniformity analysis of export NOx for SCR systems[J]. Chinese Journal of Environmental Engineering, 2017,11(9):5123-5129.
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