Process of drying water-containing solids in a fluidized bed

Details Process of drying water-containing solids in a fluidized bed Process of drying water-containing solids in a fluidized bed

F - Mech Eng,Light,Heat,Weapons

26

B

F26B 3/084 (2006.01) F26B 25/00 (2006.01)

Patent

CA 2097011

- 12 - ABSTRACT The water-containing solids are dried in a fluidized bed, which is indirectly heated by at least one heat exchanger. Water vapors having a high water vapor content are withdrawn from the fluidized bed and a part of the vapors is passed as a fluidizing fluid through the fluidized bed. The remaining vapors are cooled to form an aqueous condensate. At least part of the aqueous condensate is contacted in a purification zone with a gaseous or vaporous stripping fluid. Purified condensate and contaminated stripping fluid are separate- ly withdrawn from the purification zone. Water vapor is preferably used as a stripping fluid in the purification zone.

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