METHOD AND DEVICE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

The invention relates to an air separation apparatus that comprises a first member (A) having an elongated shape and including the medium-pressure column (1) of a dual column, on top of which are provided a reboiler-condenser (5) and an auxiliary column (2) containing at least one theoretical plate...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PONTONE, XAVIER, VALLIER, DELPHINE, CAVAGNE, PATRICE, GUILLARD, ALAIN
Format:	Patent
Sprache:	eng ; fre
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:	The invention relates to an air separation apparatus that comprises a first member (A) having an elongated shape and including the medium-pressure column (1) of a dual column, on top of which are provided a reboiler-condenser (5) and an auxiliary column (2) containing at least one theoretical plate defining the lower portion of the low-pressure column, a second member (B) having an elongated shape and defining the rest of the low-pressure column, means (11) for supplying air from the main exchange line to the medium-pressure column and a subcooler (6) provided under the first or second member having an elongated shape, means for supplying a tank liquid from the medium-pressure column to the subcooler and then to the second member having an elongated shape and/or a means for supplying a liquid from the head of the medium-pressure column to the subcooler and then to the second member having an elongated shape, and means for supplying a gas from the head of the second member having an elongated shape to the subcooler. Un appareil de séparation d'air comprend un premier élément (A) de forme allongée comprenant la colonne moyenne pression (1) d'une double colonne, surmontée d'un rebouilleur-condenseur (5) et d'une colonne auxiliaire (2) contenant au moins un plateau théorique constituant la partie inférieure de la colonne basse pression, un deuxième élément (B) de forme allongée constituant le restant de la colonne basse pression, des moyens (11) pour envoyer de l'air de la ligne d' échange principale à la colonne moyenne pression et un sous-ref roidisseur (6) placé en dessous du premier ou du deuxième élément de forme allongée, des moyens pour envoyer un liquide de cuve de la colonne moyenne pression au sous-ref roidisseur et ensuite au deuxième élément de forme allongé et/ou des moyens pour envoyer un liquide de la tête de la colonne moyenne pression au sous-ref roidisseur et ensuite au deuxième élément de forme allongée et des moyens pour envoyer un gaz de tête du deuxième élément de forme allongée au sous-ref roidisseur.