南京燃煤电厂烟气中汞的排放调查

对南京市8家国控污染源13台（套）燃煤锅炉进行监测，结果表明，燃煤电厂烟气中汞主要以气相部分汞形态存在，其排放值均达标，为0．16～15．9μg／m3，均远低于标准限值；煤质中汞含量与电厂烟气中汞浓度变化曲线的趋势是大致相似，相关系数为0．91；燃煤电厂机组容量、发电负荷越大，汞平均排放因子呈变小趋势；静电除尘器、湿法脱硫和选择性催化还原法的净化配置对汞的脱除效率最高，达到95．4％。

Ningjing Thermal Plant Boiler Flue Gas Mercury Emissions in the Survey

As Pollution sources 13 set of coal boilers in Nanjing were monitored,the results showed that meraury was mainly in gas phase in the coal-firedpower plant flue gas,the emission concentration was 0.16 ~15.9 μg/m3,and was far lower than the standard limit;Curves trend of mercury content in coal and power plant flue gas were roughly similar,the correlation coefficient is 0.91,thecoal-fired power plant unit capacity,power load inversely affected the average mercury emission factors;Electrostatic precipitator ,wet des-ulfurization and purification with selective catalytic reduction process configuration greatly contributed to removal efficiency of mercury ,up to 95 .4%.