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AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorBernard Darredeau
Estimating the term…
Process and installation for transferring a liquid, via a rising conduit (6, 9, 11, 12) provided with an expansion valve (7, 10, 13), from a first distillation column (2), operating at a first pressure, to equipment (3), particularly a second distillation column, operating at a pressure lower than the first pressure. There is injected into the rising conduit, downstream of the expansion valve, a lift gas available at a pressure greater than the pressure created by a column of liquid between the point of injection of the gas and the point of introduction of the liquid into the equipment (3). The lift gas is available at the pressure of the first distillation column (2) and is injected into the liquid in the rising column above the point of withdrawal of this liquid. There is used as lift gas a gas withdrawn from a point in the first column (2) and so chosen as not to modify substantially the composition of the transferred liquid, or a portion of the air feed to the installation can be used for this purpose.
Process for transferring a liquid from a first distillation column, operating at a first pressure, to equipment operating at a pressure lower than the first pressure, comprising:
Transfer process for a liquid from a first distillation column, operating at a first pressure, to equipment operating at a second pressure lower than the first pressure, comprising:
Distillation installation, comprising a first distillation column operating at a first pressure, equipment operating at a second pressure lower than the first pressure, and a rising conduit provided with an expansion valve and connecting a withdrawal point of liquid from the first column to a point of introduction of the liquid into said equipment, located above the point of withdrawal of said liquid, injecting means for injecting lift gas into the rising conduit, downstream of the expansion valve, and means for supplying said lift gas to said injection means at a pressure higher than the pressure created by a column of said liquid between the point of injection of the gas and the point of introduction of the liquid into said equipment.
Distillation installation, comprising a first distillation column operating at a relatively high pressure, equipment operating at a relatively low pressure, and a rising conduit provided with an expansion valve and connecting a withdrawal point of liquid from the first column to a point of introduction of liquid into said equipment, said rising conduit including a subcooler upstream from the expansion valve, and being provided with a bypass about said subcooler through which passes a minor fraction of the liquid in the rising conduit, and means for returning said minor fraction to said rising conduit downstream from said subcooler so as to produce flash gas serving as lift gas for the liquid in said rising conduit.
Dependencies are inferred from the claim text.