| abstract |
The present invention provides a device for evaporative crystallization available, wherein the device comprises an evaporation vessel, a crystallization vessel, wherein the device for evaporative crystallization further comprises a first circulation unit and a second circulation unit, the first circulation unit, a first branch pipe, a first circulation pump and a first Circulation inlet pipes connected one by one; said second circulation unit comprises said second branch pipe, a second circulation pump, a heater and a second circulation inlet pipe connected one after another, the first circulation inlet pipe and the second circulation inlet pipe being connected to the evaporation vessel. By setting up an additional first circulation circuit, some of the fine crystals are reintroduced into the crystallization vessel as a seed, which leads to a product with a more uniform and controllable particle size. |