脉冲增强及移动电极技术在火电厂除尘改造中的应用
|
摘要
为控制大气污染,中国许多地区提出了超低排放要求。为降低干式静电除尘器出口烟尘浓度,对静电除尘器脉冲供电技术、极配形式、气流组织形式及旋转刷清灰技术进行了研究,指出脉冲增强静电技术与移动电极技术联合使用,可提高静电除尘器除尘效率,且具先进性。以某电厂330 MW机组除尘改造为例,介绍脉冲增强静电技术及移动电极技术的使用情况。实践表明,改造后的静电除尘器粉尘排放质量浓度为16.4 mg/m~3,满足现行《火电厂大气污染物排放标准》要求的20 mg/m~3,且运行良好,为火电厂粉尘超低排放奠定了基础。
To harness the atmospheric pollution, the ultra-low emission requirements have been proposed in many domestic areas. In this paper, the study on pulse power supply, electrode configuration, gas distribution and rotatable brush dust cleaning technologies are conducted for reducing the outlet dust concentration of Electrostatic Precipitators(ESPs). The study concludes that the combination of pulse enhanced power combining with rotary electrode can improve the dust removal efficiency with superior advantage. Taking the dust removal retrofit project in a 330-MW unit of a power plan for example, the above applications are presented. The practice shows that the ESP dust emission mass concentration reaches as much as 16.4 mg/m~3 after the modification, meeting the standard of 20 mg/m~3 required by the"Emission standard of air pollutants for thermal power plants ". So far the ESP is still running in good condition, which lays good foundation for the ultra-low emission of the power plant.
To harness the atmospheric pollution, the ultra-low emission requirements have been proposed in many domestic areas. In this paper, the study on pulse power supply, electrode configuration, gas distribution and rotatable brush dust cleaning technologies are conducted for reducing the outlet dust concentration of Electrostatic Precipitators(ESPs). The study concludes that the combination of pulse enhanced power combining with rotary electrode can improve the dust removal efficiency with superior advantage. Taking the dust removal retrofit project in a 330-MW unit of a power plan for example, the above applications are presented. The practice shows that the ESP dust emission mass concentration reaches as much as 16.4 mg/m~3 after the modification, meeting the standard of 20 mg/m~3 required by the"Emission standard of air pollutants for thermal power plants ". So far the ESP is still running in good condition, which lays good foundation for the ultra-low emission of the power plant.
引文
[1]中国环境保护产业协会电除尘委员会.电除尘行业2014年发展综述[J].中国环保产业,2015(7):6-15.Electrostatic Precipitation Committee of CAEPI.Development report on electrostatic precipitaion industry in 2014[J].China Environmental Protection Industry,2015(7):6-15.
[2]陈沫.基于效率的电除尘电源节能改造分析及应用[J].中国电力,2008,41(9):61-64.CHEN Mo.Analysis and application about energy saving retrofit of ESP power supply based on efficiency[J].Electric Power,2008,41(9):61-64.
[3]张卫杰.转动极板电除尘技术在600 MW机组除尘改造中的应用实践[C]//第十五届中国电除尘学术会议论文集,2013.
[4]怀特H J.工业电收尘[M].王成汉,译.北京:冶金工业出版社,1984.
[5]党小庆,任燕,马广大,等.电除尘器电场数值计算与性能预测的实验研究[J].科技导报,2007,25(20):36-42.DANG Xiaoqing,REN Yan,MA Guangda,et al.Experimental study and numerical calculation on the performence of electrostatic precipitators[J].Science&Technology Review,2007,25(20):36-42.
[6]小奥格尔斯比.电除尘器[M].谭天佑,王励前,译.北京:水利水电出版社,1983.
[2]陈沫.基于效率的电除尘电源节能改造分析及应用[J].中国电力,2008,41(9):61-64.CHEN Mo.Analysis and application about energy saving retrofit of ESP power supply based on efficiency[J].Electric Power,2008,41(9):61-64.
[3]张卫杰.转动极板电除尘技术在600 MW机组除尘改造中的应用实践[C]//第十五届中国电除尘学术会议论文集,2013.
[4]怀特H J.工业电收尘[M].王成汉,译.北京:冶金工业出版社,1984.
[5]党小庆,任燕,马广大,等.电除尘器电场数值计算与性能预测的实验研究[J].科技导报,2007,25(20):36-42.DANG Xiaoqing,REN Yan,MA Guangda,et al.Experimental study and numerical calculation on the performence of electrostatic precipitators[J].Science&Technology Review,2007,25(20):36-42.
[6]小奥格尔斯比.电除尘器[M].谭天佑,王励前,译.北京:水利水电出版社,1983.