Offset FCC coolers with improved catalyst circulation
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United States of America Patent
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Sep 6, 1994
Grant Date -
N/A
app pub date -
Dec 14, 1992
filing date -
Dec 14, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of heating or cooling particulate material by indirect heat exchange of the particles with the heat exchange fluid in a heat exchanger located outside and offset from the vessel that supplies the particulate material and to which the particulate material returns uses the addition of an open conduit to increase catalyst circulation through the heat exchanger. The open conduit has been found to be effective when used internally or externally. The internal use of the open conduit minimizes structural changes required to retrofit the conduit to existing back mix coolers. The use of the conduit for increased catalyst circulation allows a flow through type cooler duty to be produced in an amount of space that would ordinarily only permit the use of a backmix type cooler.
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