摘要 |
A process and apparatus for the regeneration of spent FCC catalyst in a single vessel are disclosed. In one embodiment, catalyst is at least partially regenerated in a primary stage comprising a fast or turbulent fluidized bed. The flue gas is discharged up, with some and preferably most of the catalyst discharged laterally, through windows, into a second fluidized bed, preferably disposed as an annulus about the first. In another embodiment a cyclone separator is closely coupled to, but spaced from, the primary regeneration stage, to rapidly separate catalyst from first stage flue gas, and minimize thermal stress.
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