System for withdrawing solids from a high temperature...

Details System for withdrawing solids from a high temperature... System for withdrawing solids from a high temperature...

C - Chemistry, Metallurgy

10

J

196/127, 48/35

C10J 3/54 (2006.01) B01J 8/26 (2006.01) C10B 49/10 (2006.01)

Patent

CA 1069306

ABSTRACT OF DISCLOSURE Particulate solids are continuously discharged from a high temperature fluidized bed through a descending solids withdrawal line into a fluidized bed cooling vessel while controlling the solids discharge rate indirectly by regulating the cooling vessel pressure, preferably by means of a control valve which is used to throttle gag taken off overhead from the vessel. Fluidized solids may be discharged from the cooling vessel into a second vessel in which they are slurried in water and removed from the system through one or more pressure letdown valves. Alternatively, the particles may be passed from the fluidized bed colling vessel into a lock hopper from which they are withdrawn periodically.

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