| 摘要 |
<p>PURPOSE:To produce economically oxygen enriched gas having a high concn. by feeding part of oxygen enriched gas obtd. in an adsorption tower to other adsorption towers to pressurize one of the towers and to purge the other and by repeating the operations in order. CONSTITUTION:Dehumidified compressed air 20 is fed to the starting material inlet of a tower A through a valve 1A, and oxygen enriched gas is released from the tower A through a valve 2A. Part of the oxygen enriched gas is fed to the product outlet of a tower B through a valve 2B to pressurized the tower B to <=1kg/cm<2>.G constant pressure. A tower C is evacuated to <=400Torr through a valve 4C with a vacuum pump 19, and the tower C is purged by feeding part of the oxygen enriched gas from the tower A to the product outlet of the tower C through a valve 3C. Compressed air is then fed to the tower B, the tower C is pressurized, and the tower A is purged. Compressed air is further fed to the tower C, the tower A is pressurized, and the tower B is purged. Oxygen enriched gas having about 92% concn. of oxygen is obtd. in a high yield by successively carrying out said operations in order.</p> |
