Title:
METHOD AND APPARATUS FOR AIR SEPARATION BY CRYOGENIC DISTILLATION
Document Type and Number:
WIPO Patent Application WO/2013/167817
Kind Code:
A3
Abstract:
The invention relates to a method for air separation by cryogenic distillation in a column system that includes at least a first column (100) operating at a first pressure, and a second column (102) operating at a second pressure that is lower than the first pressure, the head of the first column being thermally connected to the tank of the second column via a vaporizer-condenser (21), a first portion of a nitrogen-enriched gas (17) is drawn from the head of the first column, compressed in a compressor (19) having an inlet temperature no higher than -150°C and condensed in the vaporizer-condenser, an oxygen-rich fluid (43) is drawn from the lower portion of the second column and heated in the exchange line, a nitrogen-rich gas (41) is drawn from the upper portion of the second column and heated in the exchange line, and a second portion of the nitrogen-enriched gas is expanded in a turbine without having been compressed.
Inventors:
DAVIDIAN BENOIT (FR)
DUBETTIER-GRENIER RICHARD (FR)
GUILLARD ALAIN (FR)
JOLY LOIC (FR)
LE BOT PATRICK (FR)
PECHOVA PETRA (FR)
DUBETTIER-GRENIER RICHARD (FR)
GUILLARD ALAIN (FR)
JOLY LOIC (FR)
LE BOT PATRICK (FR)
PECHOVA PETRA (FR)
Application Number:
PCT/FR2013/050396
Publication Date:
September 17, 2015
Filing Date:
February 27, 2013
Export Citation:
Assignee:
AIR LIQUIDE (FR)
International Classes:
F25J3/04
Foreign References:
| JPS5420986A | 1979-02-16 | |||
| FR2930329A1 | 2009-10-23 | |||
| JPS51141782A | 1976-12-06 | |||
| US3339370A | 1967-09-05 | |||
| US20100242538A1 | 2010-09-30 | |||
| US4211544A | 1980-07-08 |
Attorney, Agent or Firm:
MERCEY, Fiona (Direction de la Propriété Intellectuelle7, Quai d'Orsay Paris Cedex 07, FR)
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