Flue gas purifying system for removing white smoke plume of power plant chimney

The invention provides a flue gas purifying system for removing white smoke plume of a power plant chimney, which can effectively remove white smoke plume of the chimney, so as to meet the requirement of environment-protective emission and spreading, avoid corrosion of the chimney, eliminate bad feeling of the visual sense of people, and further eliminate the concern of people on flue gas emission. The flue gas purifying system comprises an air preheater, wherein a dust catcher is connected with the air preheater, an induced draft fan is also connected with the air preheater, a wet desulfurization device is connected with the induced draft fan, a wet electric precipitator is connected with the wet desulfurization device, and the wet electric precipitator is also connected with the chimney. The flue gas purifying system is characterized in that a pure flue gas heating device is arranged between the wet electric precipitator and the chimney.