700MW机组锅炉汞及颗粒物排放的试验研究  

Testing and Research on the Mercury and Particulate Matter Emissions of 700MW Unit Boiler

作　　者：刘发圣[1] 徐锐[1] 钟用禄 吴英[1] 夏永俊[1] 王潜[1] 

机构地区：[1]国网江西省电力科学研究院电源技术中心,江西南昌330096

出　　处：《锅炉技术》2015年第4期32-36,共5页Boiler Technology

摘　　要：为了评估大型电站锅炉汞及颗粒物排放水平,通过对江西某电厂700 MW机组锅炉在不同负荷下燃烧产物中汞及颗粒物含量的测定,获得了烟气中的汞及颗粒物浓度,分析了汞排放的形态分布及低温省煤器对ESP前后汞及颗粒物浓度的影响等。试验发现,700 MW机组锅炉煤中的汞主要以气态形式排出,少量存在于燃烧固态物中。ESP前后气态汞形态变化不明显,但二价汞浓度含量高于零价汞;低温省煤器的投运可明显降低ESP出口烟气中汞的含量,降幅可达30.8%。低温省煤器投运对于ESP脱除PM的效率有明显效果。In order to evaluate the level of mercury and Particulate matter emissions of large power station boilers. By measuring the mercury and Particulate matter content in the combustion product of a power plant in Jiangxi 700 MW units under different loads, analyzes the distribution of mercury and Particulate matter emissions and the influence of low temperature economizer mercury concentrations before and after the ESP, etc. obtain the emission characteristics of mercury of the 700 MW unit boiler. Study found that coal mercury of 700 MW unit boiler discharged mainly in the form of gas , a small amount of mercury present in the combustion solids. The gaseous mercury before and after ESP did not change obviously, but concentration of divalent mercury was higher than the mercury. The operation of low temperature economizer can obviously reduce concentration of mercury of the ESP outlet, fall by up to 30.8 %. The operation of low temperature economizer have a significant effect for the removal of PM from ESP.

关 键 词：汞 排放特性 低温省煤器 颗粒物 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]