B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
161/3
B01D 1/16 (2006.01) B01D 9/00 (2006.01)
Patent
CA 1234744
ABSTRACT A method and apparatus for the crystallization of solids from liquids includes a vessel having an elongate vertical spray chamber which overlies and is in flow communication with a collection basin for collecting slurry from the spray chamber. The collection basin has a cross-section larger than the cross-section of the spray chamber and preferably includes a side wall which extends upwardly beyond the lower end of the spray chamber to define an opening between the basin and the spray chamber which communicates with the atmosphere. A blower is located in the top of the spray chamber to draw air at substantially ambient atmospheric conditions through the opening between upper end of the basin and lower end of the spray chamber and upwardly through the chamber. The slurry solution which is to be concentrated and crystallized is sprayed into the vessel and directly contacts the air flowing through the vessel thereby re- sulting in evaporation and concentration of the sprayed slurry and the crystallization of solids therefrom. The slurry collected in the collection basin is recirculated and returned as a spray at the upper end of the chamber. If desired, the recirculated slurry may be heated prior to being returned as a spray at the upper end of the chamber. The method and apparatus may utilize waste heat in its operation and may also be employed to con- dense the otherwise wasted vapor from a series of vacuum evaporators and further concentrate the product.
440834
Fakatselis Thanassi E.
Rushton William E.
Osler Hoskin & Harcourt Llp
Swenson Process Equipment Inc.
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