Air separation schemes for the co-production of oxygen and nitrogen as gaseous products and / or liquids.

摘要

AIR is separated by a distillation process through a process of DISTILLATION CRYOGENIC using a system of distillation column comprising at least two columns (920, 921) distillation WHERE THE CEILING COLUMN (920) higher pressure is communicated THERMAL (915) to column (921) of lower pressure. A portion (120) of feed air (100) TABLET WITHOUT POLLUTANT, is condensed by appropriate means, AS FOG OPPOSITE OF LIQUID OXYGEN (22) or other cooling source (910, 911) and at least a portion (132, 144) LIQUID AIR THIS IS USED AS IMPURE reflux in a column (921) distilleries. A current (40) VAPOR RESIDUAL IS REMOVED FROM A LOCATION LOCATED NO MORE THAN FOUR PHASES THEORY ON LOCATION WHERE liquid air is fed to the column, AS THIS POWER OF STEAM RESIDUAL has a molar nitrogen FRACTION LESS THAN 0 95.