PROCESS AND APPARATUS FOR THE PRODUCTION OF LIQUID NITROGEN

A process for producing liquid nitrogen (102a) using a residual gas stream (10) derived from a flue gas of a power plant is provided. The residual gas stream is purified in a front-end purification unit (30) to remove freezable components and then the purified stream is compressed. Following compres...

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Bibliographische Detailangaben
1. Verfasser:	TURNEY, Michael A
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 process for producing liquid nitrogen (102a) using a residual gas stream (10) derived from a flue gas of a power plant is provided. The residual gas stream is purified in a front-end purification unit (30) to remove freezable components and then the purified stream is compressed. Following compression, the stream can be divided into a first portion (52) and a second portion (54), wherein the first portion is cooled and sent to a distillation column (70), wherein oxygen and argon are separated, thereby leaving an essentially pure gaseous nitrogen stream (74). The gaseous nitrogen stream can then be liquefied using refrigeration provided by expanding the second portion of the purified stream.