A new model and a design procedure for an Oslo-Krystal cooling crystallizer
Journal
Journal of the Taiwan Institute of Chemical Engineers
Journal Volume
50
Pages
76-83
Date Issued
2015
Author(s)
Abstract
The operation of the industrial Oslo-Krystal cooling crystallizer is simulated in this work as a continuous fluidized bed crystallizer with liquor recycling, where seed crystals are added at the top of the fluidized bed and product crystals are withdrawn at the bottom of the fluidized bed. It is assumed that the liquid phase moves upward through the bed in plug flow and the solid phase in the fluidized bed is perfectly classified. A model is developed to describe the variations of crystal size, bed voidage, crystal residence time and crystal production rate with the vertical position within the crystallizer. The effects of seed feed rate, feed solute concentration, recycle ratio and height/diameter ratio on the performance of such continuous fluidized bed crystallizer can be elucidated. A procedure based on the model can be used to rapidly design the crystallizer. ? 2015 Taiwan Institute of Chemical Engineers.
Subjects
Bed voidage
Crystal size
Crystallization
Fluidized bed crystallizer
Recycling
Segregation
Type
journal article