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US 9,309,468 B2Granted
Recessed gas feed distributor process for FCC riser
AssigneeUop LLC
InventorsPaolo Palmas, Paul S. Nishimura
Life of this patent
Estimating the term…
Abstract
An FCC process may include a distributor disposed in a recess in a wall of the riser for distributing gaseous hydrocarbon feed to a riser. The distributor may be shielded from upwardly flowing catalyst by a shield. An array of nozzles from the distributor may extend through openings in the shield.
Claims19
A fluid catalytic cracking process comprising:
- delivering catalyst to a riser having a wall and a recess in said wall surrounding said riser, wherein said recess is defined by a convex bulge in said wall;
- feeding gaseous hydrocarbon feed to a feed distributor disposed in said recess, said feed distributor comprising a tubular header having a round longitudinal axis, and an array of radially oriented nozzles extending from said header;
- and
- directing said gaseous feed from said radially oriented nozzles in said header towards the center of the riser into contact with said catalyst flowing upwardly in said riser.
1 more element
A fluid catalytic cracking process comprising:
- delivering catalyst to a riser having a wall and a recess defined by a convex bulge in said wall surrounding said riser, an inner diameter of the riser increasing in said convex bulge, wherein said recess is shielded to prevent said catalyst flowing upwardly in said riser from infiltrating the recess;
- feeding gaseous hydrocarbon feed to a feed distributor disposed in said recess;
- and
- spraying gaseous feed from nozzles in said feed distributor from behind an imaginary line extending between a top innermost intersection of a bulge defining said recess and said wall and a bottom innermost intersection of said bulge defining said recess and said wall at the same radial position as the top innermost intersection.
1 more element
A fluid catalytic cracking process comprising:
- delivering catalyst to a riser having a wall and a recess having an upper diagonal side in said wall surrounding said riser, an inner diameter of the riser increasing in said recess, wherein the upper diagonal side tapers inwardly to decrease the diameter of said riser;
- feeding gaseous feed comprising a naphtha cut to a feed distributor disposed in said recess, said feed distributor comprising a tubular header having a round longitudinal axis, and an array of nozzles extending from said header;
- and
- spraying gaseous feed from said nozzles in said header into contact with said catalyst.
1 more element
Dependencies are inferred from the claim text.