| 摘要 |
Variable production of compressed oxygen by means of low-temperature separation of air in a distillation column system having a high-pressure column and a low-pressure column. In a first operating mode, a first total air quantity is cooled in the main heat exchanger, and a first turbine amount is fed to the expansion to perform work. In a second operating mode, a second oxygen stream from an external source outside the distillation column system is introduced into the low-pressure column in a liquid state. There is less total air cooled in the main heat exchanger, and less air is fed to the expansion to perform work than in the first, operating mode. |
