introduction

        Oslo-type evaporative crystallizer, also known as Krystal crystallizer, is a continuous mother liquor circulating crystallizer. The operating material liquid is added to the circulating pipe, mixed with the circulating mother liquor in the pipe, and sent to the heating chamber by the pump. The heated solution evaporates in the evaporation chamber and reaches supersaturation, and enters the crystal fluidized bed below the evaporation chamber through the central pipe (see fluidization).

Main Feature 

        Also known as Krystal crystallizer, its main feature is that the supersaturation area and the crystal growth area are respectively set in two places of the crystallizer. The crystals are fluidized and suspended in the circulating mother liquor, which provides a good condition for crystal growth.

work principle

        It belongs to the mother liquor circulation type continuous crystallizer. Enter the crystal fluidized bed below the evaporation chamber through the central pipe. In the crystal fluidized bed, the supersaturated solute in the solution deposits on the surface of the suspended particles, causing the crystals to grow. The crystal fluidized bed performs hydraulic classification of the particles, with large particles on the bottom and small particles on the top, and the crystal products with relatively uniform particle size are discharged from the bottom of the fluidized bed. The fine particles in the fluidized bed flow into the circulation pipe with the mother liquor and dissolve the tiny crystals when reheating. If the heating chamber of the Oslo evaporative crystallizer is replaced by a cooling chamber and the evaporative chamber and the like are removed, the Oslo cooling crystallizer is constructed. The main disadvantage of this equipment is that the solute is easy to deposit on the heat transfer surface, and the operation is troublesome, so it is not widely used.