湿式电除尘器性能测试方法及排放特征研究
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摘要
湿式电除尘器收尘极被水膜覆盖,放电区域存在水雾,无振打二次扬尘,且细颗粒物团聚现象显著,可有效减少细颗粒物、SO_3等排放。采用一体化采样头(内置滤膜)采集颗粒物,采用重量法(PM-10)和电荷法(ELPI)测定PM_(2.5);采用冷凝法或冷凝法与异丙醇吸收相结合的采样方法测定SO_3。测定结果表明,不同型式的湿式电除尘器颗粒物、PM_(2.5)一般分别在2～5 mg/m~3及3 mg/m~3以下,除尘效率一般在75%～95%,金属极板湿式电除尘器为连续喷淋,因不存在细颗粒物的二次扬尘,颗粒物排放可达1 mg/m~3以下;不同型式的湿式电除尘器SO_3排放一般在5 mg/m~3以下,SO_3脱除效率一般在60%～80%,导电玻璃钢湿式电除尘器板电流密度一般比金属极板湿式电除尘器大,因此其SO_3脱除效率普遍更高一些。
Due to the water film covered dust collecting electrode, the existence of water mist in the discharge area and the absence of vibration and secondary dust extraction, particularly its mechanism to agglomerate the fine particles significantly, the wet electrostatic precipitator(WESP) is very effective to reduce the emission of fine particles such as SO_3. Particulate matter is collected by integrated sampling head(built-in filter membrane), while PM_(2.5) is determined by gravimetric method(PM-10) and charge method(ELPI), and SO_3 is determined by condensation method or condensation method combined with isopropanol absorption. The results show that the concentration of particulate matter in different types of WESP varies from 2 mg/m~3 to 5 mg/m~3, and PM_(2.5) is lower than 3 mg/m~3 with the dust removal efficiency around 75%～95%. Continuous spray is applied in the metal plate type wet electrostatic precipitator. Since there is no secondary dust of fine particles, the emission of particulate matter is kept below 1 mg/m~3.The emissions characterization of SO_3 in different types of WESP is generally below 5 mg/m~3, with the SO_3 removal efficiency about 60%～80%. The current density of conductive fiberglass WESP is generally greater than that of metal plate WESP, hence its SO_3 removal efficiency is generally higher.
Due to the water film covered dust collecting electrode, the existence of water mist in the discharge area and the absence of vibration and secondary dust extraction, particularly its mechanism to agglomerate the fine particles significantly, the wet electrostatic precipitator(WESP) is very effective to reduce the emission of fine particles such as SO_3. Particulate matter is collected by integrated sampling head(built-in filter membrane), while PM_(2.5) is determined by gravimetric method(PM-10) and charge method(ELPI), and SO_3 is determined by condensation method or condensation method combined with isopropanol absorption. The results show that the concentration of particulate matter in different types of WESP varies from 2 mg/m~3 to 5 mg/m~3, and PM_(2.5) is lower than 3 mg/m~3 with the dust removal efficiency around 75%～95%. Continuous spray is applied in the metal plate type wet electrostatic precipitator. Since there is no secondary dust of fine particles, the emission of particulate matter is kept below 1 mg/m~3.The emissions characterization of SO_3 in different types of WESP is generally below 5 mg/m~3, with the SO_3 removal efficiency about 60%～80%. The current density of conductive fiberglass WESP is generally greater than that of metal plate WESP, hence its SO_3 removal efficiency is generally higher.
引文
[1]LI Jianguo,YAO Yuping,LI Weidong,et al.The research on cobenefit control technical route of flue gas“ultra-clean emission”for coal-fired power plants[C]//8th i-CIPEC.Hangzhou:2014.
[2]中国环境保护产业协会电除尘委员会.燃煤电厂烟气超低排放技术[M].北京:中国电力出版社,2015.
[3]CHEN Zhaomei,SUN Zhenzhen,LIU Hanxiao,et al.Application of WESP in coal-fired power plants for“ultra-clean emission”[C]//8th iCIPEC.Hangzhou:2014.
[4]刘含笑,朱少平,姚宇平,等.电荷法测试WESP进出口烟气中PM2.5的试验研究[J].中国电力,2014,47(12):37-41.LIU Hanxiao,ZHU Shaoping,YAO Yuping,et al.Experimental research on the PM2.5 in inlet and outlet flue gas using ELPI for WESP of“ultra-clean emission”power plants[J].Electric Power,2014,47(12):37-41.
[5]刘含笑,姚宇平,郦建国,等.燃煤电厂WESP颗粒物脱除机制及排放特征研究[J].中国电力,2017,50(12):178-184.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Research of classification dust removal efficiency and pollutant emission characteristics for WESP in coal-fired power plant[J].Electric Power,2017,50(12):178-184.
[6]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].Proceedings of the CSEE,2016,36(2):468-473.
[7]沈志刚,刘启贞,陶雷行,等.湿式电除尘器对烟气中颗粒物的去除特性[J].环境工程学报,2016,10(5):2557-2561.SHEN Zhigang,LIU Qizhen,TAO Leixing,et al.Removal characteristics of particulate matters in flue gas by wet electrostatic precipitator[J].Chinese Journal of Environmental Engineering,2016,10(5):2557-2561.
[8]YANG Zhengda,ZHENG Chenghang,ZHANG Xuefeng,et al.Highly efficient removal of sulfuric acid aerosol by a combined wet electrostatic precipitator[J].RSC Advances,2018,8(1):59-66.
[9]YANG Zhengda,ZHENG Chenghang,ZHANG Xuefeng,et al.Sulfuric acid aerosol formation and collection by corona discharge in a wet electrostatic precipitator[J].Energy&Fuels,2017,31(8):8400-8406.
[10]张雪峰,杨正大,李响,等.SO3对高湿静电场中电晕放电的影响机制研究[J].中国环境科学,2017,37(9):3268-3275.ZHANG Xuefeng,YANG Zhengda,LI Xiang,et al.Effect of SO3 on corona discharge in high humidity electrostatic field[J].China Environmental Science,2017,37(9):3268-3275.
[11]姚宇平,刘含笑,朱少平.燃煤电厂低浓度烟尘测试方法探讨[J].环境工程,2015(10):139-142.YAO Yuping,LIU Hanxiao,ZHU Shaoping.Study on particulate matter gravimetric method at low concentration for coal-fired power plants[J].Environmental Engineering,2015(10):139-142.
[12]刘含笑,姚宇平,郦建国,等.超低排放下低浓度可过滤颗粒物的手工测试[J].中国粉体技术,2017,23(4):50-54.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Research of low concentration test method of PM for ultra-low emission[J].China Powder Science and Technology,2017,23(4):50-54.
[13]刘含笑,姚宇平,郦建国.燃煤电厂低浓度颗粒物测试的空白实验研究[J].中国电力,2017,50(7):115-121.LIU Hanxiao,YAO Yuping,LI Jianguo.Study on blank test of lowconcentration particulate matter gravimetric testing for coal-fired power plant[J].Electric Power,2017,50(7):115-121.
[14]刘含笑,朱少平,姚宇平,等.PM2.5重量法现场测量技术研究[J].电力与能源,2014,35(5):572-575.LIU Hanxiao,ZHU Shaoping,YAO Yuping,et al.Field measurement technology research of PM2.5 weight method[J].Power&Energy,2014,35(5):572-575.
[15]刘含笑,姚宇平,郦建国,等.燃煤电厂PM2.5测试方法研究[J].电力与能源,2018,39(1):101-106.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.PM2.5 test method for coal-fired power plant[J].Power&Energy,2018,39(1):101-106.
[16]刘含笑,郦建国,姚宇平,等.较高负压烟气环境下PM2.5测试技术研究[J].中国粉体技术,2017,23(2):79-83.LIU Hanxiao,LI Jianguo,YAO Yuping,et al.PM2.5 test experimental research for bigger negative pressure environment[J].China Powder Science and Technology,2017,23(2):79-83.
[17]刘含笑,姚宇平,郦建国,等.一种集成式PM2.5采样枪:中国,201710049662.1[P].2017-06-09.
[18]刘含笑,姚宇平,郦建国,等.PM2.5测试方法对比及其燃煤电厂排放特征分析[J].中国粉体技术,2017,23(5):44-49.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Constrast of PM2.5 test methods and emissions characterization research for coal-fired power plant[J].China Powder Science and Technology,2017,23(5):44-49.
[19]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 SO3generation,control and testing technology for coal-fired power plants[J].Electric Power,2015,48(9):152-156.
[20]刘含笑,姚宇平,郦建国,等.燃煤电厂烟气中低浓度SO3采样方法研究[J].环境工程,2017,35(11):90-94,109.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Study of SO3measurement method at low concentration for stationary source[J].Environmental Engineering,2017,35(11):90-94,109.
[21]刘含笑,姚宇平,郦建国,等.一种适用于低浓度三氧化硫采样的采样系统:中国,201710049703.7[P].2017-06-09.
[2]中国环境保护产业协会电除尘委员会.燃煤电厂烟气超低排放技术[M].北京:中国电力出版社,2015.
[3]CHEN Zhaomei,SUN Zhenzhen,LIU Hanxiao,et al.Application of WESP in coal-fired power plants for“ultra-clean emission”[C]//8th iCIPEC.Hangzhou:2014.
[4]刘含笑,朱少平,姚宇平,等.电荷法测试WESP进出口烟气中PM2.5的试验研究[J].中国电力,2014,47(12):37-41.LIU Hanxiao,ZHU Shaoping,YAO Yuping,et al.Experimental research on the PM2.5 in inlet and outlet flue gas using ELPI for WESP of“ultra-clean emission”power plants[J].Electric Power,2014,47(12):37-41.
[5]刘含笑,姚宇平,郦建国,等.燃煤电厂WESP颗粒物脱除机制及排放特征研究[J].中国电力,2017,50(12):178-184.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Research of classification dust removal efficiency and pollutant emission characteristics for WESP in coal-fired power plant[J].Electric Power,2017,50(12):178-184.
[6]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].Proceedings of the CSEE,2016,36(2):468-473.
[7]沈志刚,刘启贞,陶雷行,等.湿式电除尘器对烟气中颗粒物的去除特性[J].环境工程学报,2016,10(5):2557-2561.SHEN Zhigang,LIU Qizhen,TAO Leixing,et al.Removal characteristics of particulate matters in flue gas by wet electrostatic precipitator[J].Chinese Journal of Environmental Engineering,2016,10(5):2557-2561.
[8]YANG Zhengda,ZHENG Chenghang,ZHANG Xuefeng,et al.Highly efficient removal of sulfuric acid aerosol by a combined wet electrostatic precipitator[J].RSC Advances,2018,8(1):59-66.
[9]YANG Zhengda,ZHENG Chenghang,ZHANG Xuefeng,et al.Sulfuric acid aerosol formation and collection by corona discharge in a wet electrostatic precipitator[J].Energy&Fuels,2017,31(8):8400-8406.
[10]张雪峰,杨正大,李响,等.SO3对高湿静电场中电晕放电的影响机制研究[J].中国环境科学,2017,37(9):3268-3275.ZHANG Xuefeng,YANG Zhengda,LI Xiang,et al.Effect of SO3 on corona discharge in high humidity electrostatic field[J].China Environmental Science,2017,37(9):3268-3275.
[11]姚宇平,刘含笑,朱少平.燃煤电厂低浓度烟尘测试方法探讨[J].环境工程,2015(10):139-142.YAO Yuping,LIU Hanxiao,ZHU Shaoping.Study on particulate matter gravimetric method at low concentration for coal-fired power plants[J].Environmental Engineering,2015(10):139-142.
[12]刘含笑,姚宇平,郦建国,等.超低排放下低浓度可过滤颗粒物的手工测试[J].中国粉体技术,2017,23(4):50-54.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Research of low concentration test method of PM for ultra-low emission[J].China Powder Science and Technology,2017,23(4):50-54.
[13]刘含笑,姚宇平,郦建国.燃煤电厂低浓度颗粒物测试的空白实验研究[J].中国电力,2017,50(7):115-121.LIU Hanxiao,YAO Yuping,LI Jianguo.Study on blank test of lowconcentration particulate matter gravimetric testing for coal-fired power plant[J].Electric Power,2017,50(7):115-121.
[14]刘含笑,朱少平,姚宇平,等.PM2.5重量法现场测量技术研究[J].电力与能源,2014,35(5):572-575.LIU Hanxiao,ZHU Shaoping,YAO Yuping,et al.Field measurement technology research of PM2.5 weight method[J].Power&Energy,2014,35(5):572-575.
[15]刘含笑,姚宇平,郦建国,等.燃煤电厂PM2.5测试方法研究[J].电力与能源,2018,39(1):101-106.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.PM2.5 test method for coal-fired power plant[J].Power&Energy,2018,39(1):101-106.
[16]刘含笑,郦建国,姚宇平,等.较高负压烟气环境下PM2.5测试技术研究[J].中国粉体技术,2017,23(2):79-83.LIU Hanxiao,LI Jianguo,YAO Yuping,et al.PM2.5 test experimental research for bigger negative pressure environment[J].China Powder Science and Technology,2017,23(2):79-83.
[17]刘含笑,姚宇平,郦建国,等.一种集成式PM2.5采样枪:中国,201710049662.1[P].2017-06-09.
[18]刘含笑,姚宇平,郦建国,等.PM2.5测试方法对比及其燃煤电厂排放特征分析[J].中国粉体技术,2017,23(5):44-49.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Constrast of PM2.5 test methods and emissions characterization research for coal-fired power plant[J].China Powder Science and Technology,2017,23(5):44-49.
[19]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 SO3generation,control and testing technology for coal-fired power plants[J].Electric Power,2015,48(9):152-156.
[20]刘含笑,姚宇平,郦建国,等.燃煤电厂烟气中低浓度SO3采样方法研究[J].环境工程,2017,35(11):90-94,109.LIU Hanxiao,YAO Yuping,LI Jianguo,et al.Study of SO3measurement method at low concentration for stationary source[J].Environmental Engineering,2017,35(11):90-94,109.
[21]刘含笑,姚宇平,郦建国,等.一种适用于低浓度三氧化硫采样的采样系统:中国,201710049703.7[P].2017-06-09.