Title:
METHOD FOR SEPARATING AIR BY CRYOGENIC DISTILLATION AND INSTALLATION THEREFOR
Document Type and Number:
WIPO Patent Application WO2003033978
Kind Code:
A3
Abstract:
The invention concerns a method for separating air by cryogenic distillation using an apparatus comprising a medium pressure column (9) and a low pressure column (11) thermally communicating, which consists in cooling an amount of compressed and purified air V in an exchange line (10) to a cryogenic temperature and conveying at least part of it to the medium pressure column, conveying oxygen- and nitrogen-enriched flows (LR, LP) from the medium pressure column to the low pressure column and drawing nitrogen-and oxygen-enriched flows (35, 23) from the low pressure column. The invention is characterized in that the medium pressure column operates between 6 and 9 bar abs and the ratio between the total amount of air V entering the exchange line and the total volume of the exchange line ranges between 3000 and 6000 Nm<3>/h/m<3>.
Inventors:
GARNIER EMMANUEL (FR)
JUDAS FREDERIC (FR)
STAINE FREDERIC (FR)
JUDAS FREDERIC (FR)
STAINE FREDERIC (FR)
Application Number:
PCT/FR2002/003420
Publication Date:
October 02, 2003
Filing Date:
October 08, 2002
Export Citation:
Assignee:
AIR LIQUIDE (FR)
GARNIER EMMANUEL (FR)
JUDAS FREDERIC (FR)
STAINE FREDERIC (FR)
GARNIER EMMANUEL (FR)
JUDAS FREDERIC (FR)
STAINE FREDERIC (FR)
International Classes:
F25J3/04; (IPC1-7): F25J3/04
Foreign References:
| EP0580345A1 | 1994-01-26 | |||
| EP1099922A2 | 2001-05-16 | |||
| US5146756A | 1992-09-15 | |||
| US4375367A | 1983-03-01 | |||
| US5839296A | 1998-11-24 | |||
| EP1074805A1 | 2001-02-07 | |||
| EP0921367A2 | 1999-06-09 |
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