Multiple column nitrogen generators with oxygen coproduction

A nitrogen generator efficiently coproducing oxygen with low recovery, typically less than 70% and preferably less than 55%, has a higher pressure column (103;515) and a lower pressure column (119;319;419;537) from which an oxygen-enriched stream (123;549) is removed from a location that is at or be...

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Bibliographische Detailangaben
Hauptverfasser:	HERRON, DONN MICHAEL, HOPKINS, JEFFREY ALAN, FIDKOWSKI, ZBIGNIEW TADEUSZ
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING MIXTURES BY PRESSURE AND COLD TREATMENT REFRIGERATION OR COOLING WEAPONS
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Beschreibung
Zusammenfassung:	A nitrogen generator efficiently coproducing oxygen with low recovery, typically less than 70% and preferably less than 55%, has a higher pressure column (103;515) and a lower pressure column (119;319;419;537) from which an oxygen-enriched stream (123;549) is removed from a location that is at or below the feed to the column. The removed oxygen-enriched stream is separated in a supplemental distillation column (129;329;569) into a waste overhead(133;333;573) and a vapor or liquid oxygen product (131;331;571). Boilup (115;315;527) suitably is provided by condensing a portion (113;453;525) of nitrogen vapor from the higher or lower pressure column. The ratio of vapor to liquid flow through at least one separation zone (137) in the supplemental distillation column can be controlled by a bypass (241).