Crystallizer Design and Operation

  • Narayan S. Tavare
Part of the The Springer Chemical Engineering Series book series (PCES)


The word “design” in the title of this chapter is used in a general way and should convey the exact meaning normally implied by process engineers. It means the sizing of equipment for the desired functional duties under a given set of conditions, incorporating an element of economics in the procedure. Sizing of equipment, as discussed in this chapter, is restricted to the process engineering design. In the context of crystallizers and crystallization processes, the definition needs to be clarified: the given set of conditions includes the process conditions and sometimes the product specifications; the functional duties required are quality, yield, and product specifications of crystals. For a commercial crystallizer product, factors like shape, size and its distribution, strength, and purity are important to the consumer, while the production rates and associated costs are important to the producer. The product specifications involving the production rate, mean size, and coefficient of variation are decided by a combination of process and market requirements. The crystallizer design that can meet the required product specification formulates the crystallizer type and size, along with the suitable operating conditions. In addition to these parameters, crystallizer design demands a knowledge of system behavior and priority of functional duties to arrive at the best possible solution. The designer must also note the important point that crystallization by itself cannot be a final and isolated operation. It is normally an intermediate step in a process sequence. An interaction among these processes may have some influence which will not be considered here. The crystallization step may not be process controlling. Its performance will, however, have some influence on the performance of downstream operations, e.g., the separation systems.


Heat Transfer Coefficient Minimum Fluidization Velocity Terminal Settling Velocity Batch Crystallizer Fluid Flow Calculation 
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References and Further Reading

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Copyright information

© Springer Science+Business Media New York 1995

Authors and Affiliations

  • Narayan S. Tavare
    • 1
  1. 1.University of Manchester Institute of Science and Technology (UMIST)ManchesterUK

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