At present,coal -fired power plants have widely used denitration,dust removal and desulphurization to control the discharge of pollutants.However,the control of these technologies to SO3is not satisfactory.In recent years,the removal of SO3 from coal - fired power plants has also become a hot topic of concern. This paper introduces several common SO3control technology,including fuel mixing technology,low oxidation rate of SCR catalyst technology,alkaline sorbent injection technology, low temperature electrostatic precipitator technology,wet desulfurization technology and wet electrostatic precipitator technology, gives a brief introduction of its working principle,proposes the basic direction of SO3control in coal-fired power plant.%目前燃煤电厂为了控制污染物的排放,已经广泛采用了脱硝、除尘和脱硫等技术,但是这些技术对SO3的控制不尽人意.近年来,燃煤电厂SO3的脱除也成为人们关注的热点.文章介绍了几种常见的SO3控制技术,包括燃料混合、低氧化率SCR催化剂、碱性吸附剂喷射、低低温电除尘器、湿法脱硫和湿式电除尘等,简单地阐述了其工作原理,提出了燃煤电厂SO3控制的基本方向.
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