| 摘要 |
A METHOD OF PRODUCING NITROGEN IS A SINGLE COLUMN NITROGEN GENERATOR IN WHICH FIRST AND SECOND COOLANT STREAMS (26, 28) ARE USED TO CONDENSE NITROGEN-RICH TOWER OVERHEAD TO PROVIDE REFLUX FOR THE DISTILLATION COLUMN (14). ONE OF THE COOLANT STREAMS (28) IS COMPOSED OF LIQUID HAVING A HIGHER NITROGEN CONTENT THAN OXYGEN-RICH LIQUID PRODUCED IN A BOTTOM REGION (18) OF THE DISTILLATION COLUMN (14). THIS COOLANT STREAM IS COMPRESSED, COOLED AND RECYCLED TO THE BOTTOM OF THE DISTILLATION COLUMN (14) IN ORDER IN INCREASE NITROGEN RECOVERY.
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