Process and apparatus for fast fluidized bed regeneration of cat

Details Process and apparatus for fast fluidized bed regeneration of cat Process and apparatus for fast fluidized bed regeneration of cat

1991-07-15

1992-08-25

Warden, Robert J.

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Fluidized bed

422145, 422147, F27B 1508

Patent

active

051417120

ABSTRACT:
A process and apparatus are disclosed for achieving turbulent or fast fluidized bed regeneration of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. A coke combustor vessel is immersed in, and in open fluid communication with, the bubbling dense bed of the existing regenerator vessel. Spent catalyst is discharged into the coke combustor, mixes with hot regenerated catalyst which flows into the coke combustor, and regenerated with combustion air in a turbulent or fast fluidized bed. Catalyst and flue gas are discharged up into a dilute phase transport riser, preferably into cyclone which separate hot regenerated catalyst from flue gas. Regenerated catalyst is collected in the bubbling dense bed surrounding the coke combustor, and some is recycled by flowing into the coke combustor for direct contact heat exchange.

REFERENCES:
patent: 3785782 (1974-01-01), Cartmell
patent: 4118338 (1978-10-01), Gross et al.
patent: 5032251 (1991-07-01), Owen et al.
"Oil & Gas Journal", Fluid Catalytic Cracking Report, p. 33, A. Avidan, M. Edwards, H. Owen.

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