Key Technical Issues of SCR Denitrification from Coal-fired Boiler Flue Gas

doi:10.11930/j.issn.10.11930.2015.4.32

Abstract

Abstract: Presently, the SCR flue gas denitrification projects in thermal power plants are entering into the stage of substantial commissioning services. Unfortunately since then many hidden problems from the process of project implementation have emerged gradually. Regarding the present situation of the flue gas denitrification in thermal power plants, several key technical issues are analyzed and explored based on the summary of present SCR denitrification projects, such as the selection of design parameters, the determination of performance guarantee values, the type selection of catalyst and sootblower, the fluid field design, the ash bucket setup and other related modifications. Finally, corresponding suggestions are provided and solutions to these problems are put forward.

Key words: thermal power plant, flue gas De-NOx , SCR, modification project

CLC Number:

TM621
X701.7

ZHANG Yang, YANG Yonglong, FENG Qianwei, WANG Jianfeng, HE Sheng, ZHU Yue. Key Technical Issues of SCR Denitrification from Coal-fired Boiler Flue Gas[J]. Electric Power, 2015, 48(4): 32-35.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.10.11930.2015.4.32

https://www.electricpower.com.cn/EN/Y2015/V48/I4/32

References

[1] GB 13223—2011 火电厂大气污染物排放标准[S].
[2] 沈伯雄，王成东，郭宾彬，等. 控制氮氧化物排放的低温SCR催化剂及工程应用[J]. 电站系统工程，2006，22（5）：30－32，34.
SHEN Boxiong, WANG Chengdong, GUO Binbin, et al. Low temperature selective catalytic reduction(SCR) technology and engineering application[J]. Power System Engineering, 2006, 22(5): 30-32, 34.
[3] 曹志勇，陈聪，汤栋. 浙江省燃煤发电机组SCR烟气脱硝系统的运行状态评估[J]. 浙江电力，2013，32（11）：40－43．
CAO Zhiyong, CHEN Cong, TANG Dong. Operation evaluation of SCR flue gas denitration system of coal-fired power generating units in zhejiang province [J]. Zhejiang Electric Power, 2013, 32(11): 40-43.
[4] HJ 562—2010 火电厂烟气脱硝工程技术规范——选择性催化还原法[S].
[5] 谭青，张彦琦，王吉翔，等. 汽包锅炉实现低负荷脱硝的烟气升温系统[J]. 上海节能，2013（10）：40-44.
TAN Qing, ZHANG Yanqi, WANG Jixiang, et al. A gas temperature rising system of drum boiler denitration achieve under low load [J]. Shanghai Energy Conservation, 2013(10): 40-44.
[6] 牛中敏，丁一雨. 超超临界1 000 MW机组设置外置蒸汽冷却器的热经济性分析[J]. 热力发电，2011， 40（12）：67－69．
NIU Zhongmin, DING Yiyu. Analysis of thermal economy of installing external steam cooler for ultra-supercritical 1 000 MW unit [J]. Thermal Power Generation, 2011, 40(12): 67-69.
[7] 王春昌，陈国辉. SOFA对锅炉出口烟气温度的影响[J]. 热力发电，2013，42（10）：78－82．
WANG Chunchang, CHEN Guohui. Effect of SOFA on furnace outlet gas temperature[J]. Thermal Power Generation, 2013, 42(10): 78-82.
[8] 夏良伟，武春霖，施爱阳. 大容量锅炉省煤器两级布置及其应用[J]. 锅炉制造，2014（5）：1－3．
XIA Liangwei, WU Chunlin, SHI Aiyang. The arrangement and application of two part economizer in large utility boiler [J]. Boiler Manufacturing, 2014(5): 1-3.
[9] 刘亭，王廷春，吴瑞青，等. 低温NH3-SCR脱销催化剂研究进展[J]. 安全与环境学报，2012，12（6）：36－42.
LIU Ting, WANG Tingchun, WU Ruiqing, et al. Research advance review for low-temperature NH3-SCR catalysts[J]. Journal of Safety and Environment, 2012, 12(6): 36-42.
[10] 杨青山，廖永进. 降低SCR脱销装置最低投用负荷的策略研究[J]. 中国电力，2014，47（9）：153－155．
YANG Qingshan, LIAO Yongjin. The strategy on reduction of SCR minimum operation load[J]. Electric Power, 2014, 47(9): 153-155.
[11] 董陈，王晓冰，牛国平. 省煤器烟气旁路在SCR烟气脱硝系统中的应用[J]. 热力发电，2014，43（3）：96-100.
DONG Chen, WANG Xiaobing, NIU Guoping. Application of economizer bypass on selective catalytic reduction system[J]. Thermal Power Generation, 2014, 43(3）: 96-100.

[1]	ZHU Qianlong, JIN Xiaoqiang, WANG Xuli, SU Fanya, DENG Tianbai, TAO Jun. Minimum Risk Quantification Method for Equivalent Error Threshold of Wind Farm Based on Bayes Criterion [J]. Electric Power, 2025, 58(4): 98-106.
[2]	Xue WANG, Lin LIU, Wendi LIU, Yanpeng ZHAI, Ling YANG, Fangyuan XU, Yan GAO, Jixin ZHANG. A Novel Inertia Delay Optimization Control Strategy for New Power Systems Based on Crisscross Optimization [J]. Electric Power, 2024, 57(7): 12-20.
[3]	Hang LIU, Hao SHEN, Yong YANG, Ling JI, Yang YU. Load Forecast of Electric Trucks Aggregation Based on Higher-order Markov Chains [J]. Electric Power, 2024, 57(5): 61-69.
[4]	Jian ZHOU, Nan FENG, Yiping JI, Yuyao FENG, Shuai WANG, Shaoyan LI. A Decision-making Optimization Method for Network Reconfiguration of Power System With New Energy Considering the Synergistic Support of Source-grid [J]. Electric Power, 2024, 57(10): 150-157.
[5]	Daxing WANG, Yan Ning, Jingpei WANG, Yang XU, Jun BI, Mingbiao ZHOU, Peng WANG. Robust Simplified Modeling of Microgrid in the Context of Constructing New Power Systems [J]. Electric Power, 2024, 57(1): 148-157.
[6]	Jing WANG, Yi YUAN, Yinchi SHAO, Jinqi ZHANG, Ran DING, Yanjiang GONG. Multi-Objective Cluster Classification and Voltage Control Approach for Active Distribution Network Considering Resource Reserve Degree [J]. Electric Power, 2023, 56(12): 69-79.
[7]	Haifei MA, Wei TENG, Dikang PENG, Yibing LIU, Tao JIN. Compound Fault Feature Extraction of Wind Power Gearbox Based on DRS and Improved Autogram [J]. Electric Power, 2023, 56(10): 71-79.
[8]	LIU Yi. A Pilot-scale Research on SO₃ Control in Flue Gas of Coal Fired Power Plant [J]. Electric Power, 2022, 55(7): 201-208.
[9]	XIONG Wei, ZHANG Yue, DOU Jianzhong, JIANG Baofeng, SHAN Lianfei. Construction and Application of Discrete-Time-Domain Framework -based Power-Grid State Space [J]. Electric Power, 2022, 55(6): 111-117.
[10]	LIU Xiwen, PENG Zhuoyin, HU Xinqiang, YE Ze, HE Huixue, CAI Rui, WEI Wenbo. Annual Fuel Cost Minimization Decision Model for Thermal Power Plant and Its Applications [J]. Electric Power, 2022, 55(6): 202-207.
[11]	WU Yaning, LUO Yi, ZHOU Shengcun, TANG Muyi, YI Xuancheng. A Fast Static Voltage Stability Contingency Screening and Ranking Method Considering Source-Load Power Fluctuation [J]. Electric Power, 2022, 55(11): 29-40.
[12]	CHEN Chen, JIA Shuya, LIU Dingjia, JIA Haiwei, ZHANG Ying, QU Yanchao. Research on the Activation Change of Plate-Type Anti-arsenic-poisoning SCR De-NO_x Catalyst in High-Arsenic Flue Gas [J]. Electric Power, 2022, 55(11): 202-208.
[13]	ZENG Cong, HUANG Qiang, CHEN De, ZHENG Xiaoying, MENG Anbo. Optimal Power Flow Calculation with Improved Crisscross Optimization Algorithm [J]. Electric Power, 2021, 54(9): 9-16.
[14]	LIU Zhitan, YAO Jie, ZHUANG Ke, YU Lemeng, ZHOU Kai. Comparison of Characteristics of SCR-DeNO_x Catalyst for Gas-Turbine Units and Coal-Fired Units [J]. Electric Power, 2021, 54(6): 145-152.
[15]	YAN Min, ZHANG Yang, GUO Bowen, ZHU Yue. Analysis on the Optimization of SCR Denitrification System Based on Life Cycle Cost [J]. Electric Power, 2021, 54(3): 191-196.