| 摘要 |
The invention concerns a double column air distillation plant (1), wherein the low pressure column and the medium pressure column are arranged side by side and the low pressure column (3) vessel is above the medium pressure column (2) vessel. The low pressure column is arranged above a cryogenic fluid confining element which may be a mixing column (5), an argon column, a column operating at a pressure level intermediate between the medium pressure and the low pressure, a storage (32) or an exchanger.
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