发明名称 |
Method and apparatus for separating air |
摘要 |
Method and apparatus of separating a nitrogen from a compressed and purified feed stream in a cryogenic rectification plant that employs a distillation column to produce a nitrogen-rich vapor as a column overhead and an oxygen-rich liquid column bottoms. Reflux is generated for the column by condensing part of the nitrogen-rich vapor within a down-flow heat exchanger. A stream of the oxygen-rich liquid column bottoms is introduced into an ejector which draws a stream of an oxygen-rich liquid phase produced from the outlet of a down-flow heat exchanger. The combined oxygen-rich liquid exiting the ejector is fed to the down-flow heat exchanger to condense the nitrogen-rich vapor. In such manner, part of the oxygen-rich liquid phase is recirculated to prevent dry-out of the down-flow heat exchanger outlet and to maintain effective condensation of the nitrogen-rich vapor. |
申请公布号 |
US8161771(B2) |
申请公布日期 |
2012.04.24 |
申请号 |
US20070858158 |
申请日期 |
2007.09.20 |
申请人 |
HOWARD HENRY EDWARD;TIMM MARTIN L.;PRAXAIR TECHNOLOGY, INC. |
发明人 |
HOWARD HENRY EDWARD;TIMM MARTIN L. |
分类号 |
F25J3/00 |
主分类号 |
F25J3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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