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AssigneeLinde Aktiengesellschaft
InventorsChristoph WINDMEIER, Stefan DOWY, Andreas OBERMEIER
Estimating the term…
Feed air is compressed to a first pressure in a main air compressor. A first sub-stream of the air compressed to the first pressure is cooled and fed at least in part to the distillation column system. A second sub-stream of the air compressed to the first pressure is cooled and at least partially liquefied in a low-pressure column bottom evaporator. The at least partially liquefied second sub-stream is introduced at least in part into the distillation column system. A liquid oxygen-enriched fraction is introduced into the evaporation chamber of a high-pressure top condenser. An argon-containing oxygen stream from an intermediate point in the low-pressure column is introduced into an argon column. The second sub-stream is introduced at least in part into an argon top condenser and partially evaporated therein. The second sub-stream is then introduced at least in part into the high-pressure column and/or into the low-pressure column.
A process for producing pure nitrogen and oxygen by cryogenic fractionation of air in a distillation column system having a high-pressure column (20) and a low-pressure column (21) and also a high-pressure column top condenser (23) and a low-pressure column reboiler (24, 424, 488, 524), both of which take the form of condenser-evaporators, wherein
An apparatus for production of pure nitrogen and oxygen by cryogenic fractionation of air, comprising
Dependencies are inferred from the claim text.