Off-gas feed method and target gas purification system

B - Operations – Transporting – 01 – D

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B01D 53/047 (2006.01)

Patent

CA 2516989

The invention provides an off-gas feeding method that supplies the off -gas discharged from a plurality of adsorption towers (A, B, C) to an off-gas consumption unit (1), when performing a pressure swing adsorption process of repeating a cycle including a plurality of steps, to enrich and separate the target gas out of a gas mixture in the adsorption towers (A, B, C) loaded with an adsorbent. The method allows at least one of the plurality of adsorption towers (A, B, C) to discharge the off-gas, in all the steps included in the cycle, so as to continue to supply the off-gas to the off-gas consumption unit (1) without interruption.

L'invention concerne un procédé d'amenée d'effluents gazeux pour alimenter en effluents gazeux provenant de tours d'adsorption (A, B, C) une unité de consommation d'effluents gazeux (1), procédé caractérisé en ce qu'il comprend les étapes suivantes : concentration et séparation du gaz objet du gaz mixte par une pluralité de tours d'adsorption (A, B, C) remplies d'adsorbant au moyen d'un processus d'adsorption modulée en pression, dans lequel des cycles ayant une pluralité d'étapes sont exécutés de façon répétée, de sorte que les effluents gazeux peuvent être envoyés, sans interruption, dans l'unité de consommation d'effluents gazeux (1) par déchargement des effluents à partir d'au moins l'une des tours d'adsorption (A, B, C) dans toutes les étapes formant les cycles.

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