Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1996-03-11
1997-09-23
Kilner, Christopher
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62647, F25J 304
Patent
active
056692374
ABSTRACT:
For the method, air (103, 104) is fractionated in a medium-pressure column (6) and a low-pressure column (5). The sump heating (3) of the low-pressure column (5) is carried out with a second airflow (204), which is liquefied at the same time. An intermediate fraction (18) is taken from the low-pressure column (5) and evaporated in the head condenser (10) of the medium-pressure column (6). The thereby resulting vapor (19) is returned to the low-pressure column. In the event that impure oxygen is obtained, the second airflow (203, 204) is recompressed (202) upstream from the sump heating (3), external energy being supplied, to a pressure above that of the medium-pressure column, the pressure being relieved downstream from the sump heating (3) in a first pressure relief valve (208) to the pressure of the medium-pressure column (6). If pure oxygen is recovered, the sump heating of the low-pressure column is operated with an airflow, which at the same time is condensed at least partially and is under a pressure, which is less than the pressure of the medium-pressure column. If oxygen of high and low purity is to be recovered, a portion of the evaporated first intermediate fraction and/or a fraction obtained below the second intermediate site are recovered from the low-pressure column as oxygen product of lower purity.
REFERENCES:
patent: 4704148 (1987-11-01), Kleinberg
patent: 5006137 (1991-04-01), Agrawal et al.
patent: 5251451 (1993-10-01), Xu et al.
patent: 5349824 (1994-09-01), Ha et al.
patent: 5361590 (1994-11-01), Rathbone
patent: 5392609 (1995-02-01), Girault et al.
patent: 5396773 (1995-03-01), Ha et al.
patent: 5438835 (1995-08-01), Rathbone
patent: 5485729 (1996-01-01), Higginbotham
patent: 5551258 (1996-09-01), Rathbone
Kilner Christopher
Linde Aktiengesellschaft
LandOfFree
Method and apparatus for the low-temperature fractionation of ai does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for the low-temperature fractionation of ai, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the low-temperature fractionation of ai will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1934354