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US 8,007,729 B2Granted
Apparatus for feed preheating with flue gas cooler
AssigneeUop LLC
InventorsYunbo Liu, Xin X. Zhu, Daniel N. Myers, Patrick D. Walker
Life of this patent
Estimating the term…
Abstract
Hydrocarbon feed to a catalytic reactor can be heat exchanged with flue gas from a catalyst regenerator. This innovation enables recovery of more energy from flue gas thus resulting in a lower flue gas discharge temperature. As a result, other hot hydrocarbon streams conventionally used to preheat hydrocarbon feed can now be used to generate more high pressure steam.
Claims17
An apparatus, comprising:
- a reactor for contacting a hydrocarbon feed with catalyst to produce cracked products and coked catalyst;
- a feed line in communication with said reactor for carrying hydrocarbon feed to said reactor;
- a catalyst pipe in communication with said reactor for carrying regenerated catalyst to said reactor;
- a regenerator for combusting coke from the coked catalyst to produce regenerated catalyst and flue gas;
- a coked catalyst pipe in communication with said reactor and said regenerator for carrying coked catalyst to said regenerator;
- a flue gas line for carrying flue gas from said regenerator;
- a flue gas cooler comprising a heat exchanger with heat exchange passages having a side in communication with the flue gas line;
- and
- a feed preheat exchanger having a first side in communication with said flue gas line and a second side in communication with said feed line for heat exchanging the flue gas with the hydrocarbon feed.
6 more elements
An apparatus for recovering heat from a flue gas from a catalyst regenerator comprising:
- a flue gas cooler comprising a superheat exchanger having a first side in communication with said regenerator and a second side in communication with a steam drum;
- an evaporator heat exchanger having a first side in communication with said regenerator and a second side in communication with said steam drum;
- and
- a water preheat exchanger having a first side in communication with said regenerator and a second side in communication with a water line;
- and
- a feed preheat exchanger having a first side in communication with said regenerator and a second side in communication with a hydrocarbon feed line.
3 more elements
An apparatus, comprising:
- a reactor for contacting a hydrocarbon feed with catalyst to produce cracked products and coked catalyst;
- a feed line in communication with said reactor for carrying hydrocarbon feed to said reactor;
- a catalyst pipe in communication with said reactor for carrying regenerated catalyst to said reactor;
- a regenerator for combusting coke from the coked catalyst to produce regenerated catalyst and flue gas;
- a coked catalyst pipe in communication with said reactor and said regenerator for carrying coked catalyst to said regenerator;
- a flue gas line for carrying flue gas from said regenerator;
- a feed preheat exchanger having a first side in communication with said flue gas line and a second side in communication with said feed line for heat exchanging the flue gas with the hydrocarbon feed;
- and
- a bypass line that bypasses said feed preheat exchanger.
6 more elements
Dependencies are inferred from the claim text.