Nitrogen psa with intermediate pressure transfer

Details Nitrogen psa with intermediate pressure transfer Nitrogen psa with intermediate pressure transfer

B - Operations, Transporting

01

D

B01D 53/047 (2006.01)

Patent

CA 2210307

A process for pressure swing adsorption of oxygen from a gas mixture containing at least oxygen and nitrogen to recover an unadsorbed nitrogen enriched product from a plurality of parallel piped adsorbent beds undergoing adsorption, depressurization and repressurization wherein the improvement is conducting a pressure transfer from one bed to another from an intermediate point of the bed finishing adsorption to a point closer to the feed end of a bed that is repressurizing to improve productivity and recovery of nitrogen enriched gas in the process.

Procédé pour l'adsorption d'oxygène, par oscillation de la pression, à partir d'un mélange gazeux renfermant au moins de l'oxygène et de l'azote, de façon à récupérer un produit enrichi en azote non adsorbé à partir de plusieurs lits d'adsorbant à distribution parallèle, soumis à des phases d'adsorption, de détente et de recompression, où l'amélioration consiste en un transfert de pression à partir d'un lit à un autre à partir d'un point intermédiaire du lit parachevant l'adsorption jusqu'à un point plus proche de l'extrémité alimentation d'un lit où il y a recompression pour améliorer la production et la récupération de gaz enrichi en azote.

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