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US 7,745,365 B2Granted
Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units
AssigneeStone & Webster Process Technology, Inc.
InventorsChris Santner, Eusebius Gbordzoe, Harvey McQuiston
Life of this patent
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Abstract
An improved spent catalyst regenerator which contains sub-troughs branching off from the main trough, distribution troughs which extend outward from the sides of the main trough and the sub-troughs, and downflow tubes extending downward from the bottom of the main trough and sub-troughs.
Claims14
A method of distributing spent catalyst in a spent catalyst regenerator for a fluidized catalytic cracking unit comprising the steps of:
- a. collecting spent catalyst in a substantially elongated main trough and, optionally, fluidizing and/or aerating said spent catalyst;
- b. passing a percentage of said spent catalyst from said main trough to a plurality of sub-troughs;
- and
- c. feeding said spent catalyst from said plurality of sub-troughs and from said main trough to a catalyst bed surface,
- wherein said spent catalyst is fed from said main trough and said plurality of sub-troughs to said catalyst surface bed via a plurality of cutouts located on the walls of said main trough and said plurality of sub-troughs.
2 more elements
A method of distributing spent catalyst in a spent catalyst regenerator for a fluidized catalytic cracking unit comprising the steps of:
- a. collecting spent catalyst in a substantially elongated main trough and, optionally, fluidizing and/or aerating said spent catalyst;
- b. passing a percentage of said spent catalyst from said main trough to a plurality of downflow tubes located on the bottom of said main trough;
- c. feeding said spent catalyst remaining in said main trough to a catalyst bed surface via at least one selected from the group consisting of a plurality of cutouts located along the walls of said main trough and a plurality of distribution troughs located on the sides of said main trough;
- and
- d. feeding said spent catalyst in said plurality of downflow tubes to said catalyst bed surface.
2 more elements
Dependencies are inferred from the claim text.