Patent ID: 11933540
Assignee: PRAXAIR TECHNOLOGY, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC F | IPC F

Claim 0:
1. An integrated condenser-reboiler arrangement for a distillation column system comprising:
a phase separator; and
a once-through condenser-reboiler disposed within the phase separator, the once-through condenser-reboiler having a top section, an intermediate location, and a bottom section;
a plurality of condensing passages configured to receive a gaseous stream from the distillation column system at the top section of the once-through condenser-reboiler and condense the gaseous stream traversing through the plurality of condensing passages via indirect heat exchange with a first kettle stream and a second kettle stream to yield a condensate that exits the bottom section of the once-through condenser-reboiler;
a first set of boiling passages configured to receive the first kettle stream from the distillation column system at the bottom section of the once-through condenser-reboiler and partially vaporize the first condensing stream via indirect heat exchange with the gaseous stream traversing through the cooling passages to yield a dual phase boil off stream, and wherein the dual phase boil off stream is released from the top section of the once-through condenser-reboiler into the phase separator;
a second set of boiling passages configured to receive the second condensing medium from the phase separator at an intermediate location on the once-through condenser-reboiler and vaporize or partially vaporize the second condensing medium to yield another boil off stream that exits the top section of the once-through condenser-reboiler and directed back to the distillation column system;
wherein the phase separator is configured to separate the dual phase boil off stream into the second condensing medium and a recycle vapor stream.