中国燃煤电厂电除尘技术发展及应用综述

Development and Application Overview of Electrostatic Precipitation Technology for Coal-fired Power Plant in China

阐述了中国燃煤电厂烟尘排放要求演变及排放特征,回顾了燃煤电厂电除尘技术发展历程,介绍了电除尘技术应用情况,并对其发展趋势进行了展望。中国从20世纪60年代起开展电除尘技术自主研发以来,通过技术引进,消化吸收、再创新,历经五十多年发展,目前技术水平已跻身世界强国之列。中国燃煤电厂烟气"超低排放",及其实现"超低排放"的主流技术备受世界瞩目!电除尘器一直是中国燃煤电厂颗粒物控制的主流设备,可达到10 mg/m^3或5 mg/m^3的超低排放要求,针对高灰煤(A_(ar)>25%)机组,配合湿法脱硫协同除尘,实现颗粒物排放浓度<5 mg/m^3也是可行的。预计未来中国电除尘技术将向节能降耗、协同控制、智能化、标准化、国际化方向发展。

The evolution of emission requirements and emission characteristics of dust from coal-fired power plants in China is described,the development history of electrostatic precipitation technology in coal-fired power plant is reviewed,the application of electrostatic precipitation technology is introduced,and its development trend is prospected.Since the independent research of electrostatic precipitation technology began in 1 960 s,China has already became one of the most dominating countries in the world after more than fifty years of development through the technology,digestion,absorption and re-innovation.The Ultra-low dust emission of coal-fired power plant and the main technology to fulfill the Ultra-low emission has attracted worldwide attention.The electrostatic precipitator has always been the main equipment for particle control in coal-fired power plants,which can meet the requirement of ultra-low emissionof 10 mg/m3 or 5 mg/m3.As for the high ash coal(Aar>25%)unit,it is also possible and feasible to realize the concentration of particle emission lower than 5 mg/m3 through cooperating with wet desulfurization and dust precipitation.It is expected that the direction of dust precipitation technology will be energy saving,cooperative control,intelligence,standardization and internationalization in the future.