Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (4): 516-520.DOI: 10.12068/j.issn.1005-3026.2020.04.011

• Materials & Metallurgy • Previous Articles     Next Articles

Numerical Simulation of Oxygen Generation Characteristics of Ω-Shaped Step Radial Flow Pressure Swing Adsorbent Bed

FENG Ming-jie, XU Feng-sen, ZHOU Shuai-lei   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2019-05-21 Revised:2019-05-21 Online:2020-04-15 Published:2020-04-17
  • Contact: XU Feng-sen
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Abstract: In order to improve the performance of PSA oxygen production equipment, an Ω-shaped step radial flow adsorption bed was designed. Using Fluent 16.0 software, the change rule of the flow field, concentration field, oxygen production characteristics and bed penetration time of the adsorption bed were studied by numerical simulations, which were further compared with those in the traditional Π radial flow adsorption bed. The results showed that the penetration time of the Ω-shaped step radial flow adsorption bed is significantly longer than that of the Π-shaped one under the same conditions and the flow unevenness area is greatly reduced. Moreover, for the Ω-shaped bed, the O2 molar fraction of the production gas can reach 91.8%, which is only 87.1% for the Π-shaped one. There is a great difference in the shape of the high molar fraction O2 zone in the two types of adsorption beds during adsorption stage. The high molar fraction O2 zone moves forward in a near cup shape in the Ω-shaped bed, while it becomes a long cone shape in the Π-shaped one.

Key words: pressure swing adsorption, PSA oxygen production, radial flow, adsorption bed, O2 concentration

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