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.
Claims23
1-22. (canceled)
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 horizontal main trough and, optionally, fluidizing and/or aerating said spent catalyst;
- b. passing said spent catalyst from said main trough to a plurality of distribution troughs located along at least one side of the main trough;
- and
- c. feeding said spent catalyst from said plurality of distribution troughs to a catalyst bed surface.
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 horizontal 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.
A spent catalyst distributor for aiding in the regeneration of spent catalyst in a fluidized catalytic cracking unit comprising:
- a. a substantially elongated horizontal main trough;
- and
- b. at least one selected from the group consisting of:
- i. a plurality of distribution troughs extending outward from the sides of said main trough;
- ii. a plurality of sub-troughs branching out from said main trough;
- and
- iii. a plurality of downflow tubes connected to the bottom of said main trough.
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 horizontal main trough and, optionally, fluidizing and/or aerating said spent catalyst with externally supplied medium or using flue gas captured under a trough;
- b. passing said spent catalyst from said main trough to a plurality of distribution troughs located along at least one side of the main trough;
- and
- c. feeding said spent catalyst from said plurality of distribution troughs to a catalyst bed surface.
Dependencies are inferred from the claim text.