Experimental Study on SO3, HCl and HF Removal Efficiency of Wet Electrostatic Precipitator

doi:10.11930/j.issn.1004-9649.201803020

Abstract

Abstract: In coal-fired power plants, the flue gas after wet desulphurization still contains strong corrosive substances such as SO₃, HCl, HF and so on. Higher requirements are put forward for the corrosion resistance of the chimney even though the content is not that high. The wet electrostatic precipitator installed after the desulphurization has certain removal effect for the corrosive substances. In order to study the removal efficiency of wet electrostatic precipitator, samples were taken from the inlet and outlet flue gas of a metal plate type wet precipitator in a 330 MW unit of a power plant to detect the concentration of SO₃, HCl and HF. It is concluded that the removal efficiency of the wet electrostatic precipitator for the strong corrosive acid gases was 45%, 85% and 65%, respectively. The results show that the wet electrostatic precipitator can effectively remove the corrosive gas in the flue gas and reduce its concentration at the inlet of the chimney, and therefore the corrosion rate of chimney can be slowed down.

Key words: coal-fired power plant, wet desulfurization, wet electrostatic precipitator, SO₃, HCl, HF, removal efficiency

CLC Number:

TM621.9
X51

WANG Guihua, ZHU Binshuai, ZHANG Haizhen, HAN Haiyan. Experimental Study on SO₃, HCl and HF Removal Efficiency of Wet Electrostatic Precipitator[J]. Electric Power, 2018, 51(12): 170-174.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201803020

https://www.electricpower.com.cn/EN/Y2018/V51/I12/170

References 20

[1]	黄元平, 黄治娟, 彭儒. 等浅谈火电厂烟气排放及湿烟囱的防腐措施[J]. 华北电力技术, 2016(5):60-65. HUANG Yuanping, HUANG Zhijuan, PENG Ru, et al. Introduction to emissions from coal-fired power plant flue gas and wet stack anticorrosion measures[J]. North China Electric Power, 2016(5):60-65.
[2]	孙灏. 大型燃煤火电厂烟囱防腐问题技术研究[J]. 现代工业经济和信息化, 2015, 5(22):43-46, 51. SUN Hao. Research on the anticorrosion technology of large coal fired thermal power plant stacks[J]. Modern Industrial Economy and Informationization, 2015, 5(22):43-46, 51.
[3]	郭彥鹏, 狄华娟, 潘丹萍, 等. 燃煤烟气中SO3的形成及其控制措施[J]. 中国电力, 2016, 49(8):154-156, 171. GUO Yanpeng, DI Huajuan, PAN Danping, et al. The formation and control of SO3 in coal-fired flue gas[J]. Electric Power, 2016, 49(8):154-156, 171.
[4]	刘含笑, 姚宇平, 郦建国, 等. 燃煤电厂烟气中SO3生成、治理及测试技术研究[J]. 中国电力, 2015, 48(9):152-156. LIU Hanxiao, YAO Yuping, LI Jianguo, et al. Study on SO3 generation, control and testing technology for coal-fired power plants[J]. Electric Power, 2015, 48(9):152-156.
[5]	张军梅. 提高电站湿法脱硫系统效率及可靠性的几点措施[J]. 中国电力, 2013, 46(5):13-17, 44. ZHANG Junmei. Several measures of improving the efficiency and reliability of FGD system in power plant[J]. Electric Power, 2013, 46(5):13-17, 44.
[6]	李兵, 王宏亮, 许月阳, 等. 燃煤电厂湿法脱硫设施对烟气中微量元素的减排特性[J]. 煤炭学报, 2015, 40(10):2479-2483. LI Bing, WANG Hongliang, XU Yueyang, et al. Reduction of trace elements in flue gas by wet desulphurization facilities in coal-fired power plants[J]. Journal of China Coal Society, 2015, 40(10):2479-2483.
[7]	莫华, 朱法华, 王圣, 等. 湿式电除尘器在燃煤电厂的应用及其对PM2.5的减排作用[J]. 中国电力, 2013, 46(11):62-65. MO Hua, ZHU Fahua, WANG Sheng, et al. Application of WESP in coal-fired power plants and its effect on emission reduction of PM2.5[J]. Electric Power, 2013, 46(11):62-65.
[8]	张华东, 周宇翔, 龙辉, 等. 湿式电除尘器在燃煤电厂的应用条件分析[J]. 中国电力, 2015, 48(8):13-16, 32. ZHANG Huadong, ZHOU Yuxiang, LONG Hui, et al. Study on application conditions of wet electrostatic precipitators in coal-fired power plants[J]. Electric Power, 2015, 48(8):13-16, 32.
[9]	CHEN T M, TSAI C J, YAN S Y, et al. An efficient wet electrostatic precipitator for removing nanoparticles, submicron and micron-sized particles[J]. Separation and Purification Technology, 2014, 136:27-35.
[10]	雒飞, 胡斌, 吴昊, 等. 湿式电除尘对PM2.5/SO3酸雾脱除特性的试验研究[J]. 东南大学学报(自然科学版), 2017, 47(1):91-96. LUO Fei, HU Bin, WU Hao, et al. Experimental study on removal properties of PM2.5 and sulfuric acid mist by wet electrostatic precipitator[J]. Journal of Southeast University (Natural Science), 2017, 47(1):91-96.
[11]	王东歌, 朱法华, 易玉萍, 等. 基于实测的湿法脱硫系统对颗粒物去除效果的研究[J]. 环境监测管理与技术, 2015, 27(5):21-24. WANG Dongge, ZHU Fahua, YI Yuping, et al. Removal efficiency of WFGD system to particles based on field tests[J]. The Administration and Technique of Environmental Monitoring, 2015, 27(5):21-24.
[12]	杨志燕. 湿式电除尘器收集PM2.5微细粉尘的研究[D]. 北京:燕山大学, 2014.
[13]	赵磊, 周洪光. 超低排放燃煤火电机组湿式电除尘器细颗粒物脱除分析[J]. 中国电机工程学报, 2016, 36(2):468-473. ZHAO Lei, ZHOU Hongguang. Particle removal efficiency analysis of WESP in an ultra low emission coal-fired power plant[J]. Proceeding of CSEE, 2016, 36(2):468-473.
[14]	DU Qian, SU Lipeng, DONG Heming, et al. The experimental study of a water-saving wet electrostatic precipitator for removing fine particles[J]. Journal of Electrostatics, 2016, 81:42-47.
[15]	WANG Xiang, CHANG Jingcai, XU Chunyan, et al. Electrical characteristics of electrostatic precipitator with a wet membrane-based collecting electrode[J]. Journal of Electrostatics, 2016, 80:85-94.
[16]	解宝安. 火电厂"单筒式"烟囱脱硫防腐改造方案研究[J]. 中国电力, 2015, 48(4):71-75, 89. XIE Baoan. Modification of single tube chimney desulfurization antisepsis in thermal power plants[J]. Electric Power, 2015, 48(4):71-75, 89.
[17]	魏燕萍, 刘俊峰. 脱硫烟气对烟囱内壁的腐蚀及其防护材料的研究[J]. 武汉大学学报(工学版), 2007, 40(S1):515-518. WEI Yanping, LIU Junfeng. Research on desulfurized flue gas corrosion on internal chimney and its protective materials[J]. Engineering Journal of Wuhan University, 2007, 40(S1):515-518.
[18]	齐晓辉, 牛如清, 于洪海. 浅析火力发电厂湿法脱硫后烟囱腐蚀现状及防护[J]. 全面腐蚀控制, 2016, 30(6):55-57. QI Xiaohui, NIU Ruqing, YU Honghai. Analysis on corrosion status and protection of chimney after wet FGD in thermal power plants[J]. Total Corrosion Control, 2016, 30(6):55-57.
[19]	蔡洪良, 陈飞. 火电厂湿法烟气脱硫后烟囱防腐调研总结[J]. 武汉大学学报(工学版), 2012, 45(S1):234-238. CAI Hongliang, CHEN Fei. Summarization of corrosion protection research for chimneys with wet flue gas desulphurization[J]. Engineering Journal of Wuhan University, 2012, 45(S1):234-238.
[20]	杨彦. 火力发电厂湿法烟气脱硫系统烟囱腐蚀与防腐研究[D]. 北京:北京交通大学, 2010.

Experimental Study on SO₃, HCl and HF Removal Efficiency of Wet Electrostatic Precipitator

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