Process for cooling and fluidizing

Details Process for cooling and fluidizing Process for cooling and fluidizing

F - Mech Eng,Light,Heat,Weapons

25

D

257/2

F25D 17/00 (2006.01) B01J 8/18 (2006.01) F17C 9/02 (2006.01) F25D 3/10 (2006.01)

Patent

CA 1199629

- 12 - PROCESS FOR COOLING AND FLUIDIZING Abstract In a process for cooling and fluidizing a bed of particles by passing a cryogen through the bed, said bed being first cooled to a desired operating temperature, the improvement comprising: (a) admixing a liquid cryogen and an inert gas, said gas being at ambient temperature, at a point external, but proximate, to the bed to provide a mixture of liquid cryogen and gas at a temeprature sufficiently low to maintain the bed at about the desired operating temperature; (b) introducing the mixture from step (a) into at least two heat transfer coils connected in parallel and located in the bed whereby the desired operating temperature is imparted to the bed, and the liquid cryogen in the mixture vaporizes; and (c) removing the mixture of vaporized liquid cryogen and gas formed in step (b) from the coils and introducing the mixture into the bed to fluidize the bed.

433406

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