分析了燃煤烟气中 SO3的来源及其存在形态，阐述了烟气中较高浓度的 SO3造成的危害。针对常规除尘设施、湿法脱硫系统不能有效脱除烟气中的 SO3，介绍了几种控制烟气中 SO3的方法及其对电站锅炉的影响。%SO 3 formation and its speciation in flue gas from coal - fired power plants are analyzed,and the harms to boiler equipments and environment caused by higher concentration of SO 3 are introduced. Some control tech-nologies for SO 3 and its impacts on plants are reviewed.
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