Improved desulfurization wastewater treatment system

The invention discloses an improved desulfurization wastewater treatment system. The system comprises a pretreatment device, a degassing treatment device, an evaporation and concentration device and a concentrated solution discharge device, the pretreatment device comprises a primary sedimentation tank and an aeration regulation tank; the evaporation concentration device comprises an evaporation separator and a steam washing tower; the concentrated solution discharge device comprises a mother solution tank, a mother solution discharge pump and a slag conveyor; the aeration adjusting tank is provided with a dosing device and a plurality of aeration devices. According to the system, a softening process is not needed, an existing seed crystal method MVR process is improved, a tail end flue drying system is not needed, zero emission of desulfurization wastewater can be achieved, and the technical problems that an existing desulfurization wastewater treatment system is long in process route flow, unit coal consump