MVR (Mechanical Vapor Recompression) evaporating crystallizer

The invention discloses an MVR (Mechanical Vapor Recompression) evaporation crystallizer which comprises a separator, a separation inlet, a separation outlet, a circulation outlet, a circulation inlet, a secondary steam outlet and a mother liquor reflux inlet are formed in the separator, a spraying pipe is arranged in the separator, and a spraying head is arranged on the spraying pipe; a live steam inlet, a condensed water outlet, a heating inlet and a heating outlet are formed in the heater; a circulating pump; a compressor; and the crystal mush separation assembly is used for separating solids from the mother liquor discharged from the separation outlet and conveying the mother liquor from which the solids are separated to the mother liquor reflux inlet. According to the MVR evaporation crystallizer, the spraying pipe and the spraying head are arranged in the separator, so that wastewater circularly entering the separator is formed in a spraying mist shape, the surface area is greatly increased, evaporation