Method for cryogenic separation of air, and air separation plant

The invention relates to a method for cryogenic separation of air, in which an air separation plant (100-300) having a rectification column arrangement (10) which comprises a pressure column (11), a low-pressure column (12) and a raw argon column (13) is used. In the method, evaporation gas from a h...

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Bibliographische Detailangaben
Hauptverfasser:	GOLUBEV, DIMITRI, NOHLEN, THOMAS, SPORI, RALPH
Format:	Patent
Sprache:	chi ; eng
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 a method for cryogenic separation of air, in which an air separation plant (100-300) having a rectification column arrangement (10) which comprises a pressure column (11), a low-pressure column (12) and a raw argon column (13) is used. In the method, evaporation gas from a head gas condensation device (13.10) associated with the raw argon column (13) is partly or completely fed into the low-pressure column (12) via a gas line (13G). The gas line (13G) contains a first throttle valve (13V1) which is adjusted by means of a control device so that argon is prevented from freezing out in the first head gas condensation arrangement (13.10). This creates, at least temporarily, a pressure drop of at least 50 mbar across the throttle valve (13V1). The present invention also relates to a corresponding air separation plant (100-200).