Pressure swing adsorption process and apparatus

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01) B01D 53/053 (2006.01)

Patent

CA 2232181

A process and apparatus for separating the components of a gas mixture in a pair of adsorption vessels using a single gas compressor/ pump to move gas into and out of the adsorption vessels. The cycle is such that the gas compressor/pump is in continuous operation. The adsorption cycle is non-symmetrical in that the series of steps carried out in one of the adsorbers is not the same as the series of steps carried out in the other adsorber. The apparatus includes an intermediate gas storage container which is used to temporarily store gas removed from the nonadsorbed gas outlet end of the adsorption vessels so that it can be used to partially pressurize the adsorption vessels upon completion of the adsorbent regeneration step of the adsorption cycle.

Procédé et appareil pour séparer les composantes d'un mélange gazeux dans une paire de vases d'adsorption au moyen d'un compresseur/d'une pompe de gaz homogène pour amener le gaz dans les vaisseaux d'adsorption ou l'en extraire. Le cycle est tel que le compresseur/la pompe de gaz est en fonctionnement continu. Le cycle d'adsorption est non symétrique, c'est-à-dire que la série d'étapes menée dans l'un des adsorbeurs n'est pas la même que la série d'étapes menée dans l'autre adsorbeur. L'appareil comprend un réservoir de gaz intermédiaire qui sert à stoker temporairement le gaz extrait à la sortie des gaz non adsorbés des vases d'adsorption, de sorte qu'on puisse l'utiliser pour mettre partiellement sous pression les vases d'adsorption une fois terminée l'étape de régénération de l'adsorbant du cycle d'adsorption.

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