Low-temperature air fractionation process
AssigneeLinde Aktiengesellschaft
InventorsHorst Corduan, Dietrich Rottmann
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Abstract
The invention relates to a process for the low-temperature fractionation of air in a rectification unit, which comprises a pressure column (1) a low-pressure column (2) and a condenser-evaporator system having at least two falling-film evaporators (203, 204). Oxygen-rich liquid from the low-pressure column (2) is introduced into the evaporation passages of the first and second falling-film evaporators (203, 204) and is partially evaporated. Unevaporated oxygen-rich liquid from the first falling-film evaporator (203) is transferred into the evaporation passages of the second falling-film evaporator (204).
Claims8
Process for the low-temperature fractionation of air in a rectification unit which comprises a pressure column, a low-pressure column and a condenser-evaporator system having at least two falling-film evaporators, oxygen-rich liquid from the low-pressure column being introduced into the evaporation passages of the first falling-film evaporator and partially evaporated, and unevaporated oxygen-rich liquid from the first falling-film evaporator being passed into the second falling-film evaporator, characterized in that oxygen-rich liquid from the bottom (10) of the low-pressure column (2) is introduced into the evaporation passages of the first falling-film evaporator (203, 403) and into the evaporation passages of the second falling-film evaporator (204, 404)
Dependencies are inferred from the claim text.