Desulfurization wastewater treatment method combining multi-stage flash evaporation and evaporation tower

The invention discloses a desulfurization wastewater treatment method combining multi-stage flash evaporation and an evaporation tower, and belongs to the technical field of waste heat multi-stage flash evaporation treatment.The method is technically characterized by comprising the following steps that firstly, the concentration ratio is increased by 5-6 times through a waste heat flash evaporation self-crystallization treatment system, the treatment capacity of tail end waste liquid is reduced, and the concentration rate of the tail end waste liquid is increased by 5-6 times; the waste heat flash evaporation self-crystallization treatment system comprises a waste water storage and conveying system, a flue gas waste heat utilization system, a multi-effect flash evaporation crystallization system, an emptying system, an electrical system and a control system, desulfurization waste water does not need to be pretreated, and the desulfurization waste water directly enters the waste water storage and conveying sys