Waste salt recycling system and method based on thermal power plant energy saving and environment protection integration

The invention relates to a waste salt recycling system and method based on thermal power plant energy saving and environment protection integration. The system comprises a dryer A, a dust removal deacidification device B, a vacuum device C, a liquid-liquid heat exchanger D, a solid-liquid heat exchanger E, a high-temperature pyrolyzer F, a negative-pressure draught fan G, a dust removal deacidification device H, a dissolving pond K, a coagulative precipitation tank J, a filter press I, a seed crystal precipitation device O, an adjusting pond S, an oxidizer T, an adjusting pond U, a freezing crystallization device R, a re-dissolution pond N, an evaporation crystallizer M, a steam ejector X, an evaporation crystallizer Q, a resolver L, an adsorption device P, a freezing device V, an evaporation crystallizer W and an induced draft fan Z. Harmful and recycling treatment of danger waste salt generated during industrial production can be achieved on the basis of energy gradient utilization and waste heat recycling