山西某电厂燃煤烟气SO3与颗粒物排放特征

摘要

A 330 MW power plant coal-fired units of the pollutant removal equipment (SCR denitrification tower,electrostatic precipitator,wet electrostatic precipitator) were modified,and the emissions were detected.The pollutants concentration of SO2 、NOx and particulates were 5.1,4.1,4.2 mg/m3,meeting the ultra-low emission standards.The paper used virtual impact sampler to detect particulates grading-concentration in wet electrostatic precipitator.The removal efficiency of PM2.5,PM2.5-10,PM ＞10 were 83.29％,93.06％,96.51％,respectively.The PM2.5 removal effect was the best by wet electrostatic precipitator.The element and particle size of particulates from the import and export of electrostatic precipitator were analyzed.The synergistic removal efficiency of SO3 and alkaline substances in particulates was 10.09％,particulates with size greater than 13 μm tend to be completely removed in the electrostatic precipitator.%某330 MW电厂燃煤机组的污染物脱除设备(SCR脱硝塔、电除尘器、湿式电除尘器)进行了改造,并进行了污染物排放检测,得到SO2、NOx、颗粒物排放浓度分别为5.1,4.1,4.2 mg/m3,符合超低排放的标准.运用虚拟撞击采样器对湿式电除尘器进行了颗粒物分级浓度检测,得到PM2.5、PM2.5-10、PM＞10的脱除效率分别为83.29％、93.06％、96.51％,湿式电除尘器对PM25脱除效果明显.对电除尘器进出口灰样进行元素分析和粒径分析,得到SO3与颗粒物中碱性物质结合协同脱除效率为10.09％,粒径＞13 μm颗粒物在除尘器内部趋近于完全脱除.