发明名称 |
METHOD FOR CARBON DIOXIDE RECOVERY FROM A FEED STREAM |
摘要 |
The method of the invention recovers CO2 from an inlet cold feed stream containing a low concentration thereof, and includes the following steps. An inlet feed stream is passed through a heat exchanger, against a compressed flow of the inlet feed stream, to cool the compressed flow. The compressed flow is further cooled and compressed to a high pressure, fed to a distillation column and there converted into a vent gas including CO2 and a high purity bottom liquid CO2. A first portion of the bottom liquid CO2 is expanded to achieve a first cooled liquid CO2 refrigerant flow, which is then vaporized against the vent gas to recover condensed CO2 therefrom. The condensed CO2 is then reintroduced into the distillation column. A second portion of the bottom liquid CO2 is expanded to achieve a second cooled liquid CO2 refrigerant flow, which is then used to subcool the CO2 product output.
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申请公布号 |
CA2270513(C) |
申请公布日期 |
2003.07.08 |
申请号 |
CA19992270513 |
申请日期 |
1999.04.30 |
申请人 |
PRAXAIR TECHNOLOGY, INC. |
发明人 |
HAGSTROM, BRAD;LOZANO, ENRIQUE;LANG, GARY;NOVAK, RICHARD A. |
分类号 |
B01D53/00;C01B31/20;F25J3/02;F25J3/08;(IPC1-7):C01B31/20;F25J3/00 |
主分类号 |
B01D53/00 |
代理机构 |
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主权项 |
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地址 |
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