The OSLO continuous freezing crystallizer and the batch crystallizer have significant differences in operation mode, efficiency, product characteristics, etc. The specific comparison is as follows:
1.Operating method
Oslo Continuous Freezing Crystallizer
Continuous operation: The raw materials are continuously fed in, while the crystalline products and mother liquor are continuously discharged, achieving stable production. By automatically adjusting parameters such as temperature, concentration, and flow rate, stable crystallization conditions are maintained.
Intermittent crystallizer
Batch operation, single-time feeding, one-time discharge after crystallization, requires repeated start-stop. Each batch can adjust parameters (such as cooling rate, stirring intensity), suitable for small-scale or multi-variety production.
2. Crystal formation efficiency and energy consumption
Oslo Continuous Crystallizer
High efficiency, continuous heat and mass transfer, large output per unit time, relatively low energy consumption. Strong stability, more uniform crystal particle size distribution.
Intermittent crystallizer
The efficiency is relatively low. Each batch requires re-heating and re-cooling, and the energy consumption is high. The particle size control is limited: crystal growth is affected by batch condition fluctuations, and uneven particle size is prone to occur.
3. Product Characteristics
OSLO crystallizer
Crystal quality is stable: Continuous classification ensures that large crystals are preferentially retained, while smaller crystals are returned to the growth zone. The purity is high, and the mother liquor is continuously separated, reducing the presence of impurities.
Intermittent crystallizer
Batch-to-batch variations and parameter fluctuations may result in inconsistent crystal morphology and purity.
4. Equipment Structure and Cost
Oslo Continuous Crystallizer
The structure is complex, requiring a hierarchical design, a circulating pump, and a precise control system. The initial investment and maintenance requirements are high. Regular cleaning of deposits is necessary. It is suitable for long-term operation.
Intermittent crystallizer
The structure is simple, with a single-tank design, low cost, easy cleaning and process switching. However, the labor cost is high and frequent operations (such as feeding and discharging) are required.
5. Application Scenarios
The OSLO continuous crystallizer is used for large-scale production (such as urea, citric acid, and salt purification). It is suitable for fields with strict requirements on crystal size and purity (such as electronic-grade chemicals).
The intermittent crystallizer is used for small-batch production of high-value-added products (such as raw materials for drugs, special dyes).
