Heat exchange – Intermediate fluent heat exchange material receiving and... – Solid fluent heat exchange material
Patent
1989-05-01
1991-07-02
Davis, Jr., Albert W.
Heat exchange
Intermediate fluent heat exchange material receiving and...
Solid fluent heat exchange material
16510416, 502 44, 502 41, 122 4D, F28C 310, B01J 3832
Patent
active
050278932
ABSTRACT:
A method and apparatus for cooling hot FCC catalyst particles in a heat exchange zone that is separate and distinct from the regenerator having an upper portion that operates in a flow-through mode and a lower part that operates in a back mix mode. Catalyst descends from a collection zone into an upper inlet of a heater exchanger. The exchanger contains a series of tubes for indirect heat exchange of the catalyst with a cooling fluid. Catalyst leaves the exchanger through an outlet located at a mid portion of the exchanger. The section of the exchanger between the inlet and outlet comprises the flow-through portion. Catalyst undergoes further heat exchange below the outlet of the exchanger in the backmix portion. Fluidizing gas that enters at the bottom of the exchanger provides the necessary turbulence for particle interchange in the backmix section of the heat exchange zone as well as transport of the particulate material through the flow-through portion of the exchanger. The method and exchanger design facilitates the addition of surface area to the exchanger and increases the heat removal duty in the backmix section of the exchanger.
REFERENCES:
patent: 2619451 (1952-11-01), Ogorzaly et al.
patent: 4614726 (1986-09-01), Walters et al.
patent: 4757039 (1988-07-01), Lomas
Cetinkaya Ismail B.
Lomas David A.
Davis Jr. Albert W.
McBride Thomas K.
Tolomei John G.
UOP
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