F - Mech Eng,Light,Heat,Weapons – 25 – J
Patent
F - Mech Eng,Light,Heat,Weapons
25
J
F25J 3/04 (2006.01)
Patent
CA 2111206
2111206 9321488 PCTABS00027 A generator produces ultra-high purity nitrogen and ultra-high purity oxygen simultaneously by the liquefaction and rectification of feed air. Feed air is rectified in a first rectification column (4), and nitrogen gas separated to the column top thereof is liquefied, in a nitrogen condenser (8), by oxygen-enriched liquid air separated to the bottom portion of the first rectification column. The oxygen-enriched liquid is fed to the upper portion of a second rectification column (5) having a reboiler (5a) in its column bottom, so that through its rectification in the second rectification column oxygen gas is fed from above a liquid reservoir to the lower portion of the third rectification column (6). Through the rectification of the oxygen gas in the third rectification column, high purity oxygen gas, from which impurities having higher boiling points than that of oxygen have been removed by liquefaction, is fed to the center portion of the fourth rectification column (7) having a condenser (7e) in its top portion and reboiler (7a) in its bottom portion. Through the rectification of the high purity oxygen gas in the fourth rectification column, impurities having lower boiling points than that of oxygen are exhausted from the top portion thereof as non-condensed gas and ultra-high purity liquid oxygen is separated to the column bottom thereof.
Nagamura Takashi
Yamamoto Takao
L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Proced Es Geo
Swabey Ogilvy Renault
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