湿式静电除尘器在火电厂大型机组中的应用  

APPLICATION OF WET ELECTROSTATIC PRECIPITATOR IN HIGH CAPACITY THERMAL POWER GENERATION UNIT

作　　者：金定强[1] 舒喜 申智勇[1] 庄柯[1] 唐会金 

机构地区：[1]国电环境保护研究院,南京210031 [2]国电益阳发电有限公司,湖南益阳413000

出　　处：《环境工程》2015年第3期65-68,72,共5页Environmental Engineering

基　　金：国家高技术研究发展技术(863计划)(2013AA065401);国电环境保护研究院科技项目(H14Y01)

摘　　要：为了满足最新的GB 13223—2011《火电厂大气污染物排放标准》的烟尘排放要求(一般地区30 mg/m3,重点地区20 mg/m3),需要对现有电除尘器进行改造。湿式静电除尘器可以降低粉尘、液滴和重金属的排放浓度,并同时解决湿法脱硫系统的浆液夹带而产生的石膏雨问题,是目前实现烟尘达标排放的最佳选择方案之一。因此国电集团决定在益阳电厂300MW大型机组的电除尘器烟尘减排技术改造中采用自主研发的湿式静电除尘技术(即柔性电极深度净化技术),该项目作为示范项目,受到集团公司和环保业界的高度关注。调试结果表明:该技术具有适应性强、不受煤种、烟尘特性影响,除尘和去除液滴效率高等优点,具有很广泛的发展前景。With the implementation of the 'Emission Standard of Air Pollutants for Thermal Power Plants'( GB 13223—2011),the key regions have to execute the most strict emissions standards that the dust emission concentration is required to be lower 20 mg / m3. In order to meet the requirements,the existing electrostatic precipitators( ESP) need to be reformed. The wet electrostatic precipitator( WESP) can further reduce the particle,droplet and heavy metal concentrations. Through the improvement of the traditional wet electrostatic precipitator,we developed the deep purification system with flexible collection electrode to purify the flus gas after the flue gas desulfurization( FGD). The technology as a demonstration project of China Guodian Corporation is for the first time used in large units of thermal power plant. The engineering project attracts the attention of environmental protection field. The commissioning results demonstrate that the WESP has high adaptability,dust and droplet removal effect,and unaffected by the coal smoke characteristics. It will have a good development prospect.

关 键 词：湿式静电除尘器 柔性电极烟气深度净化装置 示范工程 

分 类 号：X773[环境科学与工程—环境工程]