采用HYDRA AA全自动测汞仪对3个燃煤电厂的飞灰未燃尽碳进行测试,并利用垂直炉试验系统对电厂飞灰吸附烟气汞进行了试验研究.结果表明：不同燃煤电厂飞灰中的未燃尽碳含量不同是由于各电厂不同煤种、不同燃烧工况以及机组的不同参数造成的;同一电厂的飞灰在灼烧后与原灰相比,对烟气汞的吸附效率相差不大;除了飞灰中的未燃尽碳对汞有吸附外,尾矿对汞也有一定的吸附作用;未燃尽碳含量高的飞灰对汞的吸附效率也较高.%Unburned carbon in fly ash samples from three coal fired power plants was measured and its ad- sorption capability on flue gas mercury was experimentally studied using vertical furnace system. Results show that the difference of unburned carbon content among three samples may be caused by different coal types, combustion conditions and unit parameters. For fly ash from the same power plant, its adsorption capability on flue gas mercury basically keeps the same before and after burning test. Besides unburned carbon in fly ash, residuals have also some effects on mercury adsorption. Fly ash with higher content of unburned carbon has also higher adsorption efficiency on flue gas mercury.
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