超低排放机组湿式电除尘器多污染物减排及能效测试研究

Study on WESP Multi-pollutant Emission Reduction and Energy Efficiency Test of Ultra-low Emission Unit

湿式电除尘器(wet electrostatic precipitator,WESP)是燃煤烟气治理的精处理设备,以某660 MW超低排放机组配套金属板式湿式电除尘器为研究对象,对湿式电除尘器的多污染物脱除性能和能效参数开展系统测试研究和分析。湿式电除尘器对颗粒物、雾滴、SO3和Hg的脱除效率分别为81.12%、75.60%、76.13%、53.08%,电耗为402.6(kW·h)/h,满足设计要求。各污染物排放质量浓度分别为4.20、17.25、9.80、4.08×10^(-4)mg/m^(3),排放因子分别为13.76、56.49、32.10、1.34×10^(-3)g/(kW·h),比电耗为1.48×10^(-4)(kW·h)/m^(3),单位质量颗粒物脱除能耗为22.87(kW·h)/kg,均处于行业平均水平。研究结果可为燃煤电厂后续污染物减排和能效控制提供借鉴。

Wet electrostatic precipitator(WESP)is a fine treatment equipment for the treatment of coal flue gas.Taking a 660 MW ultra-low emission unit as the research object,the multi-pollutant removal performance and energy efficiency parameters of WESP were tested and analyzed systematically.The removal efficiencies of particulate matter,fog drop,SO3and Hg of WESP were 81.12%,75.60%,76.13%and 53.08%,respectively,and the power consumption was 402.6(kW·h)/h,which met the design requirements.The emission mass concentration of each pollutant were 4.20,17.25,9.80,4.08×10-4mg/m~3,respectively,the emission factors were 13.76,56.49,32.10,1.34×10-3g/(kW·h),respectively,the specific power consumption was 1.48×10-4(kW·h)/m~3.The energy consumption for particle removal per unit mass was 22.87(kW·h)/kg,which was in the industry average level.This study can provide reference for the subsequent pollutant reduction and energy efficiency control of coal-fired power plants.