Research on precise ammonia injection retrofit for SCR denitration systems in thermal powers

Abstract

Abstract:

After the popularization of ultralow emission standards for denitration systems in domestic thermal power plants, inaccurate ammonia injection of traditional SCR denitration systems has resulted in excessive NOx emissions, high ammonia escape rate,blockage of air preheaters and so on. Taking No.7 unit of a power plant in Jiangsu as an example, ammonia injection retrofit for the unit was executed sector by sector, and multipoint measurement system for NOx mass concentration and intelligent ammonia injection control logic were added. A big data prediction and analysis station for NOx was established, which can predict the NOx mass concentration more accurately. After the retrofit, the ammonia consumption of the unit is reduced by 8%~10%, NOx distribution at the outlet is uniform, the ammonia escape rate is reduced, the air preheater blockage problem is solved.The ultralow emission of the SCR denitration system is realized.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">NOfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">xfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">, precise ammonia injection, big data analysis, realfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">time prediction, ammonia escape, denitration, ultrafont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">low emission

HAO Zheng，HU Xiaofu，WANG Yun，WANG Yang，SHEN Xianming，LI Wei，WANG Hua.

Research on precise ammonia injection retrofit for SCR denitration systems in thermal powers [J]. Huadian Technology, 2019, 41(10): 8-11.

[1]	WANG Yawen, ZONG Shaoliang, CHENG Zhiyuan, LU Wanpeng. Reliability evaluation on SCR denitrification systems in thermal power plants based on FTA [J]. Integrated Intelligent Energy, 2024, 46(8): 77-85.
[2]	YU Sheng, ZHOU Xia, SHEN Xicheng, DAI Jianfeng, LIU Zengji. Risk analysis on the source-grid-load-storage system affected by cyber attacks [J]. Integrated Intelligent Energy, 2024, 46(5): 41-49.
[3]	WANG Yonglin, BAI Yongfeng, KONG Xiangshan, HAO Zheng, YANG Pengfei, KONG Dewei. Study on denitration optimization control model based on CNN-LSTM algorithm [J]. Integrated Intelligent Energy, 2023, 45(6): 25-33.
[4]	ZHANG Xu, ZHANG Haohao, GU Jihao. Study on difference analysis and sampling inference methods of room temperature spatial characteristics [J]. Integrated Intelligent Energy, 2022, 44(9): 51-58.
[5]	ZUO Wendong, LI Biao, GUO Baogang, GAO Xiaoyu, GU Jihao, WANG Weihe, DONG Zhipeng. Application of the secondary network intelligent balance system based on big data analysis [J]. Integrated Intelligent Energy, 2022, 44(3): 44-49.
[6]	HU Xiaofu, WANG Yun, HAO Zheng, SHEN Jianyong, WANG Hua. Research on SCR catalyst service life on-line prediction in coal-fired power plants [J]. Huadian Technology, 2021, 43(3): 65-69.
[7]	BAI Hao, ZHANG Jian, GUO Xinwei, LIU Yicheng, MA Qianhui, ZHANG Zhongxiao. Numerical simulation for synergistic control on denitration in the pulverized coal boiler with air staging and flue gas circulation [J]. Huadian Technology, 2020, 42(9): 9-15.
[8]	WANG Wei, WANG Lele, KONG Fanhai, CHEN Mu, YAO Yan, LEI Siyuan. Selection and design of SCR catalyst for a high-temperature dedusting and denitration integrated device [J]. Huadian Technology, 2020, 42(9): 26-31.
[9]	YU Jing, HOU Bo, HUANG Qishun, MA Dawei, CHEN Qian, CHENG Jing. Study on form distribution and emission of mercury from ultra-low emission coal-fired power plants [J]. Huadian Technology, 2020, 42(9): 69-75.
[10]	WANG Jianguo, QIN Yiming, GAO Chunyu, MENG Fanqiang, WANG Zhengshang, WANG Song, CHEN Hua. Treatment process upgrade of wastewater from denitration catalyst production [J]. Huadian Technology, 2020, 42(9): 93-96.
[11]	CHEN Hongyan，TANG Zhiguo，CHEN Qi，WANG Yongxu，WU Luming. Optimized method on distributed reactive power compensation in lowvoltage distribution network based on interval power flow calculation [J]. Huadian Technology, 2020, 42(6): 1-5.
[12]	WANG Lijie，WANG Hongteng，SUN Bo. Operation region partition for hydraulic turbine generator units based on stability test data [J]. Huadian Technology, 2020, 42(6): 6-9.
[13]	WU Luming，XUE Mingjun，CHEN Qi，WANG Yongxu，TANG Zhiguo，CHEN Hongyan1,2. 一起电子互感器异常引发的复杂发展性故障分析及改进 [J]. Huadian Technology, 2020, 42(6): 10-15.
[14]	NIU Ben. Water quality control technology for circulating cooling water taking soft water as source [J]. Huadian Technology, 2020, 42(6): 16-21.
[15]	SHANG Liyang，FAN Suxiang，ZHANG Zhiyong，YU Penghui，HE Yong，JI Yanru. Design and application of intelligent algaeblocking equipment for water conveyance main canal [J]. Huadian Technology, 2020, 42(6): 22-24.

Research on precise ammonia injection retrofit for SCR denitration systems in thermal powers

PDF

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments