METHOD FOR COOLING A HYDROCARBON-RICH FRACTION

A method is described for cooling a hydrocarbon-rich fraction, in particular of natural gas, wherein - the hydrocarbon-rich fraction (1) is cooled against at least one coolant circuit (10-15), - the coolant has at least nitrogen, carbon dioxide, methane and/or C2+ hydrocarbons, - the coolant is comp...

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Bibliographische Detailangaben
Hauptverfasser:	JUNGFER, BERND, KAMANN, MARTIN, BURMBERGER, STEPHAN
Format:	Patent
Sprache:	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:	A method is described for cooling a hydrocarbon-rich fraction, in particular of natural gas, wherein - the hydrocarbon-rich fraction (1) is cooled against at least one coolant circuit (10-15), - the coolant has at least nitrogen, carbon dioxide, methane and/or C2+ hydrocarbons, - the coolant is compressed by means of at least one turbocompressor (C1) having one or more gas-lubricated sliding-ring seals, and - as primary seal gas, a substream of the coolant and/or an external gas or gas mixture having substantially nitrogen and/or methane is fed to the turbocompressor (C1), and as secondary seal gas, nitrogen is fed. According to the invention, at least one nitrogen-rich stream (21) is withdrawn at least at times from the coolant circuit (10-15).