Process and apparatus for producing nitrogen and oxygen

Details Process and apparatus for producing nitrogen and oxygen Process and apparatus for producing nitrogen and oxygen

1990-08-28

1994-04-26

Walsh, Donald P.

Refrigeration

Vortex tube, e.g., ranque

62 11, F25B 902

Patent

active

053056108

ABSTRACT:
The present invention is a separation process for atmospheric gases. In the process, an atmospheric gas stream, for example air, is compressed and may be partly condensed prior to introduction into a vortex tube air separator. The performance of the tube separation can be upgraded, i.e. by improving the concentration and/or purity of the main oxygen stream, by enhancing the separator efficiency of the vortex tube (VT) apparatus. One approach is by selectively refrigerating the cold end of the tube with partial recycle of nitrogen gas waste stream, effecting a rectification section. Another approach is to increase the heat transfer between the outlet gas stream and the liquid film flowing along the curvilinear periphery of the separator means, by mechanical innovations in its configuration.

REFERENCES:
patent: 1952281 (1934-03-01), Ranque
patent: 2548377 (1951-04-01), Kapitza
patent: 2861431 (1958-01-01), Deemter
patent: 2894371 (1959-07-01), Auer et al.
patent: 2907174 (1959-10-01), Hendal
patent: 3296807 (1967-01-01), Fekete
patent: 3775988 (1973-12-01), Fekete

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