| 摘要 |
<p>PURPOSE:To prevent the pressure of a liquefied gas reservoir from being boosted up, by disposing a device for boosting liquefied gas and an absorbing device for selectively absorbing impure component gas which has not been reliquefied in a reliquefying device, upstream of the reliquefying device. CONSTITUTION:Gas evaporated from LNG is introduced into an absorbing device 10 while it is maintained at a low temperature, and an absorbent for selectively absorbing thereinto nitrogen gas is disposed in the absorbing device 10. With this arrangement, only nitrogen gas in evaporated gas is absorbed in the absorbing device, and the remaining evaporated gas may be discharged from the absorbing device 10. The evaporated gas from the absorbing device 10 flows into a compressor 4 after cooling return gas through a het-exchanger 11, then is boosted up to a pressure necessary for circulation and cooled down in the heat- exchanger 11. The evaporated gas is then liquefied in a reliquefying device 5.</p> |
