Desulfurization wastewater pretreatment device

The invention discloses a desulfurization wastewater pretreatment device. The desulfurization wastewater pretreatment device comprises a first tank body, a motor, a stirring shaft, through holes, a medicine tank, electric telescopic rods, an aeration pipe, a second tank body, a water inlet pipeline, a liquid pump, flocculating and cleaning mechanisms, a spray tower, a gas inlet pipeline, a gas outlet pipeline, a spray solution, a circulating pump, a supporting pipeline, an odor treatment mechanism and a gas pipe, wherein the motor is arranged at the middle part of the upper end of the first tank body; the stirring shaft is arranged on an output end of the motor. A material falling plates are enabled to be opened and closed through telescopic motion of the electric telescopic rods, so thatmixing a flocculating agent with wastewater by putting the flocculating agent in the first tank body can be realized. Compared with a traditional manual adding mode of the flocculating agent, the desulfurization wastewater pr