Treatment device for calcium-containing wastewater generated in polycrystalline silicon production process

The utility model relates to the technical field of wastewater treatment, in particular to a treatment device for calcium-containing wastewater generated in a polycrystalline silicon production process. The device comprises a raw material liquid tank, a feeding pump, a dead steam preheater, a condensate water preheater, a first-stage heating chamber, a second-stage heating chamber, a discharging pump, a second-stage separation chamber, a second-stage discharging pump, an evaporation kettle and a drying machine which are sequentially connected through pipelines, a primary steam inlet and a primary steam outlet are formed in the first-stage heating chamber, and the primary steam outlet is connected with an MVR separator; the MVR separator is connected with a secondary separator, the secondary separator is connected with a compressor, a secondary steam outlet of the compressor is connected with a primary steam inlet of the primary heating chamber, the primary heating chamber is further provided with a dead steam