Apparatus for coke burning in regeneration of hydrocarbon conversion catalyst
This patent describes apparatus for regenerating spent catalyst particles by the removal of coke in a burn zone. The apparatus comprising: a vessel; first and second vertically-extended catalyst screens disposed within the vessel and spaced apart by a uniform horizontal distance over the length of the screens to define a burn zone and confine catalyst particles in a vertically-elongated bed of catalyst particles that occupies the burn zone; means for adding catalyst particles to the top of the vertically-elongated bed and withdrawing catalyst particles from the bottom of the vertically-elongated bed to provide an at least intermittent downward gravity flow of catalyst particles through the vertically-extended bed; means for passing recycle gas into and collecting flue gas from the vertically-elongated bed; and a plurality of gas flow apertures in at least one of the first and second screens. The apertures providing at least a part of the means for varying the gas flow rate and the apertures having a maximum open area at the top of the vertically-extended bed and a minimum open area at the bottom of the vertically-extended bed, so that the maximum gas flow rate is at the top of the bed and the minimum gas flow rate is at the bottom of the bed.
- Assignee:
- UOP, Des Plains, IL
- Patent Number(s):
- US 4880604; A
- Application Number:
- PPN: US 7-116932A
- OSTI ID:
- 6962297
- Resource Relation:
- Patent File Date: 4 Nov 1987
- Country of Publication:
- United States
- Language:
- English
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