Title:
METHOD AND DEVICE FOR PRODUCING A GASEOUS PRESSURIZED OXYGEN PRODUCT BY CRYOGENIC SEPARATION OF AIR
Document Type and Number:
WIPO Patent Application WO/2011/018207
Kind Code:
A3
Abstract:
The invention relates to a method and device used to produce a gaseous oxygen pressurized product by cryogenic separation of air in a distillation column system, which has at least one separation column. Feed air is compressed in an air compressor. A first partial flow (2, 4, 6, 7) of the compressed feed air is expanded to perform work (5, 8). A second partial flow (3) of the compressed feed air (1) is cooled and liquefied or pseudo-liquefied and subsequently introduced into the distillation column system. A liquid oxygen product flow (51) is removed from the distillation column system, brought in the liquid state to a first elevated pressure (52), evaporated or pseudo-evaporated at said first elevated pressure by indirect heat exchange (10) with the second partial flow (3) of the compressed feed air, heated to approximately the ambient temperature (10) and finally withdrawn in the form of a gaseous product flow (55). The evaporated or pseudo-evaporated oxygen product flow (53) is brought further to a second elevated pressure that is higher than the first elevated pressure in a cold compressor (13). The product flow (54) is heated (10) under said second elevated pressure to approximately the ambient temperature. At least part of the mechanical energy generated during the work-performing expansion (5, 8) of the first partial flow (3) is used to drive the cold compressor (13).
Inventors:
RATHBONE THOMAS (GB)
MASTERSON FRANCES (DE)
MASTERSON FRANCES (DE)
Application Number:
PCT/EP2010/004883
Publication Date:
March 13, 2014
Filing Date:
August 10, 2010
Export Citation:
Assignee:
LINDE AG (DE)
RATHBONE THOMAS (GB)
MASTERSON FRANCES (DE)
RATHBONE THOMAS (GB)
MASTERSON FRANCES (DE)
International Classes:
F25J3/04
Foreign References:
| EP1972875A1 | 2008-09-24 | |||
| US5477689A | 1995-12-26 | |||
| US20090188280A1 | 2009-07-30 | |||
| US20080223075A1 | 2008-09-18 | |||
| US6009723A | 2000-01-04 | |||
| US4796431A | 1989-01-10 |
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