| 摘要 |
The invention relates to the pressure swing adsorption (PSA) process for separating or purifying one or more gas component from a feed gas mixture, so as to overcome the disadvantages such as low utilization ratio of adsorbent, high investment in system, insufficient recovery of product gas and high operational cost in prior art. M empty tanks are used in PSA system to avoid or reduce direct bed-to-bed pressure equalization and reduce restriction in operation between adsorbent beds. Thus, it is possible to reasonably arrange process flow so that with sufficient times to equalize pressure, adsorption is simultaneously carried out in more adsorbent beds. There are longer periods for regeneration. These result in higher utilization ratio of adsorbent and less dimension of equipments, pipes or valves. Finally, investement and operational cost decreased.
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