| 摘要 |
A method of producing nitrogen is a single column nitrogen generator in which first and second coolant streams are used to condense nitrogen-rich tower overhe ad to provide reflux for the distillation column. One of the coolant streams is compos ed of liquid having a higher nitrogen content than oxygen-rich liquid produced in a bo ttom region of the distillation column. This coolant stream is compressed, cooled and recycled to the bottom of the distillation column in order to increase nitrogen recovery.
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