Psa with adsorbents sensitive to contaminants

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01) B01D 53/06 (2006.01)

Patent

CA 2430156

Disclosed embodiments address contaminant management challenges that arise during production of desirably contaminant free product fluid in the operation of PSA equipment, and further address the more serious challenges that arise under intermittent operation of PSA equipment. One embodiment includes a breather fluidly coupled to a feed end of an adsorber with a contaminant- sensitive adsorbent. The breather can be coupled to the feed end through a shutoff valve closed during production and open during shutdown. Other embodiments use particular sealing strategies for additional sealing of the apparatus, or at least components thereof, from contaminant ingress. For example, a buffer seal for receiving a buffer gas having a contaminant vapor content substantially the same as or less than a product gas produced by a pressure swing adsorption process over the adsorbers. As a second example, a parking seal can be used that typically is engaged when the apparatus is parked.

Les modes de réalisation de la présente invention concernent des impératifs de gestion des contaminants qui apparaissent durant la production d'un fluide produit exempt de contaminants lors de la mise en oeuvre de l'équipement d'AMP. Un mode de réalisation comprend un reniflard couplé de façon fluidique à une extrémité d'alimentation d'un adsorbeur avec un adsorbant sensible aux contaminants. Ce renifleur peut être couplé à l'extrémité d'alimentation par l'intermédiaire d'une vanne de fermeture fermée durant la production et ouverte lors de l'arrêt. D'autres modes de réalisation utilisent d'autres techniques d'étanchéisation pour étanchéiser davantage l'appareil, ou du moins des composants de ce dernier, contre l'entrée de contaminants. Par exemple, un joint de protection destiné à recevoir un gaz de protection ayant une teneur en vapeur de contaminant sensiblement identique ou inférieure au gaz produit selon un procédé d'adsorption modulée en pression sur les adsorbeurs. Dans un autre exemple, un joint d'arrêt peut être utilisé, ce joint étant généralement en prise lorsque l'appareil est mis en attente.

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