The SO2in the exhaust gas of thermal power plants causes acid rain and seriously contaminatesair, one of the means to tackle which is to desulphurize flue gas of thermal power plants.

• 火力发电厂烟气排放中的SO2,在空气中形成酸雨，严重污染生态环境，环保治理手段之一便是进行火电厂烟气脱硫。