| 摘要 |
A method of separating gases by means of multiple adsorption columns packed with adsorbents wherein a cycle involving a sequence of operations (adsorption, first pressure reduction, second pressure reduction, desorption , scrubbing and boosting) is repeated. In the adsorption step, gas mixture (G1 ) is introduced in column (A) so as to cause the adsorbents to adsorb unnecessary components, and product gas (G2) is led outside the column (Fig. 3A). In the first pressure reduction step, the internal pressure of column ( C) is reduced by lead-out of gas (G3) (Fig. 3A). In the second pressure reducti on step, the internal pressure of column (C) is further reduced by lead-out of gas (G3) (Fig. 3B). In the desorption step, unnecessary components are desorbed from the adsorbents, and gas (G4) is purged outside the column (C) (Fig. 3C). In the scrubbing step, introduction of gas (G3) and purging of ga s (G4) are simultaneously carried out (Fig. 3A). In the boosting step, the internal pressure of column (B) is boosted by introduction of gas (G3) (Fig. 3B). The gas (G3) from the column (C) during the first pressure reduction st ep is led into the column (B) during the scrubbing step (Fig. 3A), and the gas (G3) from the column (C) during the second pressure reduction step is led in to the column (B) during the boosting step (Fig. 3B).
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