Oslo Type Crystallizers have been developed in facilities with long-standing design experience and are optimized for the production of large-grain crystals. In this crystallization type, the supersaturation of the main solution is relieved by contact with the large crystals. Crystals mostly held within the suspension ensure the production of large crystals with a narrow size distribution.
The classifier crystallization section forms the lower part of the crystallizer unit. The upper part contains the liquor-steam separation zone where the solvent (usually water) is evaporated. Slightly supersaturated liquor flows downward through a central tube, relieving supersaturation by contacting the fluidized crystal bed.
The operating costs of Oslo type crystallizers are lower compared to other types, especially when large crystals are required. As the crystals do not contact the agitator, the amount of fine particles and thus energy requirements are reduced. Oslo type crystallizers can operate between long washing cycles, allowing extended production periods.
Advantages:
- Lower operating costs compared to other crystallizer types
- Allows continuous operation with low maintenance requirements
- Permits long production cycles between washing periods, making it economical and efficient for producing large crystals
