发明名称 |
Separation of a gas mixture |
摘要 |
A relatively simple apparatus for producing nitrogen typically containing less than 10 vpm of nitrogen includes a unit 2 for producing nitrogen-enriched air by means other than fractional distillation and a rectification column 8, provided with a reboiler 10 and a condenser 12 for providing reflux, which is operated to produce a relatively pure nitrogen fraction at the top 16 of the column 8 and a less pure nitrogen fraction at the bottom 18 of the column 8. The unit 2 may be a plant for separating air by pressure swing adsorption. The nitrogen-enriched air that it produces is compressed in compressor 4 cooled by heat exchange in heat exchanger 6 and the reboiler 10 and is then expanded through expansion valve 14 into the column 6. <IMAGE> |
申请公布号 |
GB2170894(A) |
申请公布日期 |
1986.08.13 |
申请号 |
GB19860000708 |
申请日期 |
1986.01.13 |
申请人 |
THE * BOC GROUP PLC |
发明人 |
MICHAEL ERNEST * GARRETT;MICHAEL SYLVESTER * MATHEWS |
分类号 |
F25J3/04;F25J3/08;(IPC1-7):F25J3/04 |
主分类号 |
F25J3/04 |
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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