Experimental Study on the Flue Gas Mercury Removal Capability of ESP

In order to study the effect of electrostatic precipitator(ESP) on removing flue gas mercury,the mercury speciation on ESP inlet and outlet and the removal efficiency are tested on site.As the results show,the flue gas removing efficiency of ESP is 27.9%,mainly effective in oxidized mercury and particulate mercury removal,but weak in elemental mercury removal.The fine particle(25? m ～ 60? m) accounts for 58.5% of fly ash,showing strong mercury retention ability,which makes ESP have a good effect on removing mercury,especially oxidized mercury.In order to improve the mercury retention ability of fly ash,measures are taken to transform the elemental mercury into oxidized mercury,which is the technology direction of improving flue gas mercury removal efficiency by ESP.