Refrigeration – Cryogenic treatment of gas or gas mixture – Separation of gas mixture
Patent
1997-05-14
1998-09-15
Kilner, Christopher
Refrigeration
Cryogenic treatment of gas or gas mixture
Separation of gas mixture
62652, F25J 304
Patent
active
058063404
ABSTRACT:
A high purity nitrogen generator unit which is excellent in the energy efficiency and the recovery of high purity nitrogen gas, is provided. In a rectification column 1, feed air is separated to oxygen-rich liquid air and nitrogen gas. The oxygen-rich liquid air in its bottom is reduced in pressure by a first expansion valve 21 and sent to a composition regulation column 3. The nitrogen gas in its top is condensed in a nitrogen condenser 2, the resulting liquid nitrogen is returned as a reflux liquid to the rectification column 1 and non-condensed gas is released. After oxygen-rich waste gas in the lower part of the composition regulation column 3 is reduced in pressure by an expansion turbine 6, it is released by way of a first heat exchanger 4. Mixed gas in the top of the composition regulation column 3 is introduced for re-circulation into a first compressor 5. Another portion of the mixed gas is returned to the composition regulation column 3 by way of a second compressor 7, second heat exchanger 8 and second expansion valve 22. The second compressor 7 is driven by means of the expansion turbine 6. High purity liquid nitrogen taken out of the vicinity of the top of the rectification column 1 is evaporated for recovery in the second heat exchanger 8.
REFERENCES:
patent: 4705548 (1987-11-01), Agrawal et al.
patent: 4848996 (1989-07-01), Thorogood et al.
patent: 4869742 (1989-09-01), Thorogood et al.
patent: 5349822 (1994-09-01), Nagamura et al.
patent: 5511380 (1996-04-01), Ha
patent: 5546765 (1996-08-01), Nagamura et al.
patent: 5582034 (1996-12-01), Naumovitz
patent: 5711167 (1998-01-01), Ha et al.
Kilner Christopher
Teisan Kabushiki Kaisha
LandOfFree
High purity nitrogen generator unit and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High purity nitrogen generator unit and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High purity nitrogen generator unit and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-77155