发明名称 |
Fremgangsmåde og anordning til udvinding af komprimeret nitrogen |
摘要 |
The process and the apparatus serve to produce pressurized nitrogen by low-temperature fractionation of air in a rectification system which has a pressure column (4) and a low-pressure column (5). Feed air (1, 3) is passed into the pressure column (4). An oxygen-containing liquid fraction (11) is taken off from the pressure column (4) and fed into the low-pressure column (5). Gaseous nitrogen (18) from the low-pressure column (5) is at least partially condensed in a top condenser (17) by indirect heat exchange with an evaporating liquid (13). Nitrogen from the low-pressure column is produced as gaseous pressurized nitrogen product (24, 25, 29) at a pressure which is higher than the operating pressure of the low-pressure column (5). Liquid nitrogen (20) withdrawn from the low-pressure column is brought (21) in the liquid state to a pressure which exceeds the pressure of the low-pressure column (5). The pressurized liquid (22) is evaporated in a product evaporator (23) by indirect heat exchange with a heat-transfer medium (35) and is subsequently produced as gaseous pressurized nitrogen product (24, 25, 29). (FIG. 1) |
申请公布号 |
DK0948730(T3) |
申请公布日期 |
2000.10.16 |
申请号 |
DK19970948844T |
申请日期 |
1997.10.30 |
申请人 |
LINDE AKTIENGESELLSCHAFT |
发明人 |
KUNZ, CHRISTIAN;HAAG, WOLFGANG;CORDUAN, HORST;ROTTMANN, DIETRICH;VOIT, JUERGEN |
分类号 |
F25J3/04;(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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