Continuous crystallization device for iminodiacetonitrile

The utility model relates to a continuous crystallization device for iminodiacetonitrile. The continuous crystallization device for iminodiacetonitrile comprises a first-stage crystallizer, a second-stage crystallizer, a crystal cultivating device, a separator, a precipitator and a mother liquid tank, which are sequentially communicated, wherein the first-stage crystallizer is communicated with a material liquid pipeline through a first-stage collecting tank at the upper part; a first-stage discharge hole formed in the upper end of a first-stage lower straight section crystallizing zone of the first-stage crystallizer is communicated with a second-stage collecting tank at the upper part of the second-stage crystallizer; a second-stage discharge hole in the upper end of a second-stage lower straight section crystallizing zone of the second-stage crystallizer is communicated with a feeding hole in the top of the crystal cultivating device; a discharge hole in the lower end of the crystal cultivating device is c