基于实测燃煤电厂污染物控制装置对汞排放的影响

Mercury emission of the power plant with air pollution control devices based on measured data

为了研究燃煤电厂现有烟气污染物控制装置对汞排放的影响,本文选择常规烟气净化设备为选择性催化还原脱硝技术、静电除尘技术和湿式石灰石脱硫技术的某300MW燃煤发电机组。利用安大略法(OHM)湿式采样方法对采样点催化氧化脱硝(SCR)前、电除尘器(ESP)前、ESP后和湿法烟气脱硫(WFGD)后的燃煤电厂烟气进行采集和实验室测试分析,获得此燃煤电厂烟气流经污染物控制装置时烟气中各价态汞的浓度,进而计算出现有污染物控制装置的联合脱汞效率为84.63%,从而获得此燃煤电厂现有污染物控制装置对汞排放的影响。

In order to research the impact of mercury emission from thermal power plant, a 300MW coal-fired power plant were selected, in which the thermal plant was equipped with the Selective Catalytic Reduetion（SCR）, Electrostatic Precipitators（ESP） and Wet Flue Gas Desulfurization（WFGD）. The method of Ontario Hydro（OHM） was used to take sample in the point of the SCR inlet, dust collector inlet, dust collector outlet and FGD outlet to obtain the contents of mercury. The results show that the mercury removal efficiency was 97.56% with the air pollution control devices.