Study on ammonia escape rate control technology of SCR denitrification system in coalfired power plant

Abstract

Abstract:

Based on the reaction principle of SCR denitrification system, causes of ammonia escape and hazards to coalfired power plants are revealed. Factors affecting the ammonia escape rate of the denitrification system include denitrification catalyst performances, flue field uniformity, boiler operation modes, ammonia injection logic system, measurement gauges and methods, etc. According to these influencing factors and units operational status, control strategies for reducing ammonia escape rate are proposed. It provides guidance and reference for ultralow emission modification and performance optimization of SCR denitrification system in domestic coalfired power plants.

Key words:

coalfired power plants, denitrification system, selective catalytic reduction, ultralow emission, ammonia escape

YOU Songlin1,LUO Honghui1, WANG Zhen1, YAO Yongqi1,LIU Xiuru2,SUN Yiqing2,CHEN Feng2.

Study on ammonia escape rate control technology of SCR denitrification system in coalfired power plant

[J]. Huadian Technology, 2019, 41(2): 55-59.

[1]	CAO Xiguo, ZHANG Yongtao, LI Yatian. Prediction method for NO_x discharged from SCR denitrification systems based on IQGA-GRNN model [J]. Huadian Technology, 2021, 43(5): 9-14.
[2]	XU Ketao，HE Yongbing，PEI Yukun，ZHANG Yang. Analysis and improvement of SCR denitrification devices blockage in a coalfired power plant [J]. Huadian Technology, 2019, 41(6): 46-49.
[3]	JIANG Ting1，2，HU Yongfeng1，2，SONG Hongtao1，2，LI Jianbiao1，2，SHEN Jianyong1，XU Jingjing1，2，ZHANG Aiping1，2. Numerical simulation research on SCR denitration in a buildingtype distributed energy system [J]. Huadian Technology, 2019, 41(3): 1-7.
[4]	QIN Yiming，HAN Tongjiang，WANG Guanyu，WANG Jianguo，CHEN Hua. Application of flow field simulation in SCR honeycomb denitrification catalyst mold design [J]. Huadian Technology, 2019, 41(12): 20-24.
[5]	FANG Mingcheng, LIU Yuqiang, WANG Runming, ZHOU Ming. Research on ammonia spraying optimization in SCR denitrification system [J]. Huadian Technology, 2018, 40(9): 61-65.
[6]	WANG Jihua. Application and comparison of SCR, SNCR and SNCR/SCR flue gas denitration technology [J]. Huadian Technology, 2018, 40(6): 68-70.
[7]	SUN Jingnan, WANG Guanyu, QIN Yiming, HAN Tongjiang. Application of computational fluid dynamics software in the SCR denitration technology of thermal power plant [J]. Huadian Technology, 2018, 40(2): 74-76.
[8]	WAGN Lele, YANG Xiaoning, HE Chuan, YAO Yan, KONG Fanhai, WANG Lipeng, ZHANG Fajie, SONG Yubao. Coalfired power plant waste SCR catalyst harmless blending combustion study and feasibility analysis [J]. Huadian Technology, 2017, 39(5): 7-11.
[9]	LIANG Xiujin, ZHU Yue, WEI Hongge. 360MW unit SCR denitration system operation improvement simulation [J]. Huadian Technology, 2017, 39(5): 70-73.
[10]	SUN Zuyi1, ZHANG Huadong2, LEI Siyuan3, MA Yuedong1,WANG Lele3, KONG Fanhai2. Application of gasgas heater in a selective catalytic reduction denitrification urea hydrolytic system for a certain 150MW power unit [J]. Huadian Technology, 2017, 39(2): 68-70.
[11]	LIANG Weiping, JIA Yan, ZHANG Chaofeng. Power plant environmental protection data collection center implement based on EDPFNT+ [J]. Huadian Technology, 2016, 38(8): 66-68.
[12]	HUO Xiaohua1, HU Zhijian2, REN Cuitao3. Case study of selective catalytic reduction for denitrification system of a certain power plant [J]. Huadian Technology, 2016, 38(8): 75-76.
[13]	ZHANG Jinzhu, JI Jinfang, LIANG Xinlei, LI Na. Transformation plan for NOx ultra low emission in a 600MW unit [J]. Huadian Technology, 2016, 38(7): 74-75.
[14]	TAO Liwei. System optimization of ammonia storage area for the denitration of thermal power plant [J]. Huadian Technology, 2016, 38(4): 56-57.
[15]	CHENG Jinwu. Research and problem analysis of mobile testing technology at the scene of ammonia escape [J]. Huadian Technology, 2016, 38(10): 33-36.

Study on ammonia escape rate control technology of SCR denitrification system in coalfired power plant

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments