| 摘要 |
<p>PURPOSE:To produce O2-enriched gas with high efficiency by combining specified processes which utilize adsorption under varied pressure and separating N2 from gaseous mixture consisting essentially of O2 and N2. CONSTITUTION:Three adsorption towers packed with adsorbent are used and a primary pressure equalizing process is proceeded by connecting a tower A with another tower B or C at the end parts of produced gas of each tower wherein pressurized gaseous mixture is fed from an end part of the feed gas of the tower A, and the tower B or C has been already pressurized by the gaseous mixture to a specified pressure and discharges produced O2-enriched gas. Further, a purging process is performed for cleaning the inside of the adsorption towers by introducing O2-enriched gas from other tower from the produced gas end of the tower while the tower is evacuated from the feed gas end and desorption of N2 is being carried out. A secondary pressure equazing process between the tower A and the tower B or C is performed by connecting the end part of the feed gas or end part of produced gas of a tower in which desorption of N2 and regeneration of the adsorbent have been finished, with the end part of produced gas of another tower. These three processes are appropriately combined for the practice. Thus, O2-enriched gas as product is discharged continuously without interruption during the cycles of the processes.</p> |
