| 摘要 |
<p>PURPOSE:To obtain O2-enriched air with a high O2 separation ability at a low cost without need for the exchange of the adsorbent or gas separation membrane unlike the conventional method by circulating a liq. capable of selectively absorbing O2 in air between a pressure chamber and a reduced-pressure chamber, separating and recovering the O2 dissolved and absorbed by the pressurization of air. CONSTITUTION:Air is pressurized 3 and supplied to the pressure chamber 1 charged with a liq. 2 having O2 absorptivity from its bottom, and diffused into the liq. 2 as fine bubbles. Meantime, a liq. 21 in the reduced-pressure chamber 20 is sent to the chamber 1 from a liq. suction port 25 at the bottom of the chamber 20. When the pressure in the chamber 1 is increased, the gaseous O2 in the fine bubbles is vigorously absorbed by the liq. 2, and the gas layer at the upper part in the chamber 1 is filled with air having a low content of O2. As the liq. 2 is continuously supplied into the chamber 1, the pressure in the chamber 1 is further increased, and the liq. 2 having absorbed and dissolved O2 is discharged 19 into the chamber 20. The pressure of the liq. contg. a large amt. of gaseous O2 is decreased in the chamber 20, and gaseous O2 is separated from the liq. 2 and discharged. Meanwhile, the greater part of O2 is liberated from the liq. 21, and the liq. 21 is again sent into the chamber 1, and a closed loop of the circulating liq. is formed.</p> |
