Smoke gas afterheat utilization device

The utility model provides a smoke gas afterheat utilization device. Smoke gas afterheat before an electric dust remover is effectively utilized for heating wet smoke gas after the desulfurization, so that most liquid drops after the desulfuration by wet processes are removed. The smoke gas afterheat utilization device comprises a heat recoverer and a reheater, wherein the heat recoverer is arranged at a smoke gas inlet of the electric dust remover, the reheater is arranged at a smoke gas outlet of a desulfurizing tower, and heat exchange medium sides of the heat recoverer and the reheater are mutually communicated for forming a heat exchange medium closed circulation loop. The smoke gas afterheat utilization device has the advantages that sulfur trioxide in the smoke gas can be effectively removed, subsequent equipment is prevented from being corroded by the sulfur trioxide, the specific resistance of the smoke gas dust can also be effectively reduced, the efficiency of the electric dust remover is improved, the airflow distribution of the electric remover is optimized, the smoke gas resistance is reduced, the coal consumption is reduced, the smoke gas temperature and the smoke gas lifting height after the wet process desulfuration are raised, the contaminant ground level concentration is reduced, and the phenomena of chimney white smoke rising, chimney rain and the like are relieved.