Converted FCC bubbling bed regenerator
AssigneeUop LLC
InventorsPaolo Palmas, Frank S. Rosser, Jr., Patrick D. Walker
Life of this patent
Estimating the term…
Abstract
An apparatus and process for regenerating cracking catalyst may include a regenerator, a distributor penetrating the bottom of the regenerator, a spent catalyst conduit, a return standpipe, and a recirculating standpipe, wherein the return standpipe and the recirculating standpipe are connected to the upper half of the regenerator. An apparatus for regenerating cracking catalyst may include a spent catalyst standpipe and a recirculation standpipe positioned on an inner side of the regenerator vessel.
Claims26
A fluidized catalytic cracking process, comprising:
- cracking hydrocarbon feed in a riser with regenerated catalyst to form cracked stream and spent catalyst;
- combining said regenerated catalyst, and said spent catalyst into a mixture in a mixing zone;
- adding lift gas to the mixing zone;
- transporting said mixture upwardly into a regenerator vessel having a dense bed;
- adding combustion gas to the regenerator vessel, said combustion gas being the majority of the gas added to the process;
- regenerating said spent catalyst into said regenerated catalyst in said dense bed;
- withdrawing regenerated catalyst from near a top half of said dense bed;
- returning a first portion of said regenerated catalyst into said riser;
- and
- recirculating a second portion of said regenerated catalyst to said mixing zone.
An apparatus for regenerating cracking catalyst, comprising:
- a regenerator vessel having a bottom and a side, wherein said side has an upper half;
- a distributor penetrating through said bottom;
- a spent catalyst conduit flowably connected to said distributor;
- a return standpipe flowably connected to said upper half;
- and
- a recirculating standpipe flowably connected between a bottom of said upper half and said distributor.
An apparatus for regenerating cracking catalyst, comprising:
- a regenerator vessel having a bottom and a side and a dense bed of catalyst in said vessel;
- a distributor penetrating through said bottom and in fluid communication with said regenerator vessel;
- a spent catalyst conduit with an outlet in fluid communication with said distributor;
- a return standpipe with an inlet in fluid communication with said regenerator vessel in the top third of said dense bed of catalyst;
- and
- a recirculating standpipe with an outlet in fluid communication with said distributor.
An apparatus for regenerating cracking catalyst, comprising:
- a generally cylindrical regenerator vessel having a lower portion, with an inner side, a bottom and a dense bed of catalyst contained therein;
- a distributor penetrating through said bottom and in fluid communication with said regenerator vessel;
- a spent catalyst standpipe positioned on said inner side and in fluid communication with said distributor;
- a recirculation standpipe positioned on said inner side and in fluid communication with said distributor;
- a spent catalyst conduit in fluid communication with said regenerator vessel;
- and
- a return catalyst conduit penetrating said lower portion and in fluid communication with said regenerator vessel.
Dependencies are inferred from the claim text.