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US 5,896,755 AGranted
Cryogenic rectification system with modular cold boxes
AssigneePraxair Technology, Inc.
InventorsKenneth Kai Wong, Dante Patrick Bonaquist, John Frederic Billingham, Michael Douglas Monteith, Neil Mark Prosser
Life of this patent
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Abstract
A cryogenic rectification system for producing oxygen having a feed air preparation system and a plurality of same size cold box modules operating in parallel and in conjunction with the feed air preparation system.
Claims6
A method for carrying out cryogenic rectification of feed air to produce oxygen comprising:
- (A) processing feed air in a feed air preparation system to produce prepared feed air;
- (B) passing the prepared feed air in a plurality of inputs into a plurality of cold boxes, each of said inputs having the same flowrate and passed into a single cold box;
- (C) producing oxygen by cryogenic rectification in each of the cold boxes, and
- (D) passing oxygen from each of the cold boxes to the feed air preparation system and recovering product oxygen from the feed air preparation system.
1 more element
Apparatus for carrying out cryogenic rectification of feed air to produce oxygen comprising:
- (A) a feed air preparation system and means for passing feed air into the feed air preparation system;
- (B) a plurality of cold boxes, each cold box having the same capacity, and means for passing feed air from the feed air preparation system into each of the cold boxes;
- (C) means for passing oxygen from each of the cold boxes to the feed air preparation system;
- and
- (D) means for recovering product oxygen from the feed air preparation system.
2 more elements
Dependencies are inferred from the claim text.