Method for treating at least one feed gas mixture by pressure swing adsorption
AssigneeL'Air Liquide, Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsChristian Monereau, Guillaume De Souza
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Abstract
The invention concerns a treatment method which consists in using a pressure swing adsorption treatment unit (16) and causing said treatment unit (16) to follow a nominal operating cycle, based on nominal operating conditions and in order to ensure minimal performances of the feed gas treatment. It further consists in providing at least a pre-programmed auxiliary operating cycle, different from the nominal cycle, and, when the operating conditions differ from the nominal conditions to the extent that the treatment unit (16) no longer achieves its minimal performances, in imposing to the treatment unit (16) to follow the or one of the auxiliary cycles.
Claims11
A method for treating at least one feed gas by adsorption, of the type in which a pressure swing adsorption treatment unit is used and in which said treatment unit is made to follow a nominal operating cycle defined according to nominal operating conditions and for the purpose of guaranteeing minimum feed gas treatment performance levels, wherein:
- a) at least one preprogrammed auxiliary operating cycle, different from the nominal cycle, is used;
- b) when the operating conditions differ from the nominal conditions to the point that the treatment unit no longer achieves its minimum performance levels, the treatment unit is made to follow the at least one auxiliary cycle;
- c) the nominal operating cycle is identified by a triplet X.Y.Z, where X denotes the number of active adsorbers of the treatment unit, Y denotes the number of adsorbers in simultaneous adsorption and Z denotes the number of pressure balancing steps carried out on said nominal cycle;
- and
- d) at least one of the number X′ of active adsorbers, of the number Y′ of adsorbers in simultaneous adsorption and of the number Z′ of pressure balancing steps carried out on each of the at least one auxiliary cycles is different from the corresponding number of the nominal cycle.
Dependencies are inferred from the claim text.