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US 2019/0195574 A1Published application
Process and apparatus for cooling catalyst
AssigneeUop LLC
InventorsJuan C. Vargas, Dharmesh C. Panchal
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Abstract
A process and apparatus for cooling catalyst in a catalyst cooler is disclosed. Nested tubes in the catalyst cooler have an undulating wall for improving heat transfer from the catalyst bed across the wall to the water inside the tubes. The outer tubes have an end wall at an inlet end opposed to an outlet end of a respective inner tube. The helical wall improves the efficiency of heat transfer to increase cooler duty for heavy feed stocks.
Claims20
A process for cooling a bed of catalyst in a catalyst cooler comprising:
- passing water from a water manifold to an inner tube;
- heating water in said inner tube by indirect heat exchange with heated water in an outer tube across an inner wall to vaporize at least some of the water in the inner tube;
- passing vaporized water to an outer tube nested around said inner tube;
- passing heat from said catalyst bed across an outer wall of said outer tube to said water in said outer tube;
- collecting said vaporized water in an outlet manifold;
- fluidizing said catalyst in said catalyst bed;
- wherein at least one of said inner wall and said outer wall comprises an undulating wall.
4 more elements
An apparatus for cooling a bed of catalyst comprising:
- a vessel comprising a plurality of inner tubes each surrounded by an outer tube to comprise a plurality of nested tubes, said nested tubes comprising an undulating wall;
- a water manifold defined by a water tube sheet and in communication with said plurality of inner tubes;
- and
- an outlet manifold defined by an outlet tube sheet and in communication with said plurality of outer tubes;
- a distributor for distributing fluidizing gas to said catalyst cooler.
2 more elements
An apparatus for cooling catalyst comprising:
- a catalyst cooler comprising a plurality of inner tubes each surrounded by an outer tube to comprise a plurality of outer tubes;
- each of said outer tubes have an undulating outer wall;
- a water manifold defined by a water tube sheet and in communication with said plurality of inner tubes;
- an outlet manifold defined by an outlet tube sheet and said water tube sheet, said outlet manifold in communication with said plurality of outer tubes;
- and
- a distributor for distributing fluidizing gas to said catalyst cooler.
3 more elements
Dependencies are inferred from the claim text.