Installation for the distillation of air and corresponding cold box
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorAlain Guillard
Life of this patent
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Abstract
In this installation (1) for the distillation of air in a double column, the low pressure column and the medium pressure column are disposed side by side and the base of the low pressure column (3) is above the base of the medium pressure column (2). The low pressure column is disposed above an element for confining a cryogenic fluid which can be a mixing column (5), an argon column, a column operating at a pressure intermediate the medium pressure and the low pressure, a storage (32) or an exchanger.
Claims11
Installation (1) for the distillation of air, of the type comprising a double distillation column which itself comprises a medium pressure column (2), a low pressure column (3), means for withdrawing liquid from the medium pressure column and expanding said withdrawn liquid to produce an expanded fluid and for introducing said expanded fluid into the low pressure column, a vaporizer-condenser (4) to place in heat exchange relation a calorigenic gas with liquid from the bottom of the low pressure column, and an element (5) for confining cryogenic fluid that passes through the installation, the low pressure column being beside the medium pressure column, characterized in that the bottom of the low pressure column is higher than the bottom of the medium pressure column and in that the low pressure column (3) is disposed above this confinement element (5).
Process for mounting a separation apparatus containing at least one medium pressure column (2), a low pressure column (3), if desired an element (5) for confining a cryogenic fluid surmounted by the low pressure column, and a vaporizer-condenser (4) to condense at least partially a calorigenic gas by heat exchange with a liquid from the low pressure column comprising the steps of mounting the low pressure and medium pressure columns beside each other, each column having its own cold box, and thereafter mounting the vaporizer-condenser above the medium pressure column.
Dependencies are inferred from the claim text.