Taking the 300 MW unit in Shenhua Guohua Sanhe Coal-fired Power Plant as the research object

mercury emission characteristics test was performed to obtain the mercury emission situation of this power station and the mercury cooperative control efficiency of air pollution control facilities.The precipitator can remove the particulate mercury and transform it to the ash and slag.The proportion of particulate mercury to the total mercury in flue gas which already passed the precipitator dropped from 5.66% to nearly 0

indicating the mercury removal rate of the electrostatic precipitation reached 100% approximately.Due to the SCR denitration catalyst

about 83.4% of the gas phase Hg0 in flue gas was oxidized to gas phase Hg2+

thus the mercury emission was reduced.Combining with the research of mercury control for coal-fired power plants at home and abroad

suggestions for reducing the mercury emission were put forward

such as coal washing

mercury removal after combustion

and mercury speciation transformation.