| 摘要 |
PURPOSE:To retrieve residual gas in a container prior to a pressure resistant inspection etc. of the liquefied gas container such as LPG cylinder, and to provide a residual gas retrieving apparatus which is rechargeable with the retrieved liquefied gas after cleaning the interior of the container. CONSTITUTION:A gas retrieval conduit 1 has at its one end multiple container connecting sections 11 to connect a container M to the conduit 1, and the retrieving conduit 1 is connected to the first and second fractional distillation tanks 2A, 2B through a switch valve V1 etc. Each fractional distillation tank 2A, 2B is connected at the top with an inlet for a common vaporized gas retrieving conduit 3 which is connected with a switch valve V3 and a compressor 31. The fractinal distillation tanks 2A, 2B contain in them heat exchanger 20A, 20B through which vaporized gas from the compressor 31 passes, and the liquefied gas therein is retrieved to a reservoir 6. Further, the reservoir 6 is connected to the second and third reservoirs through a liquefied gas retrieving conduit 65, and the second container connecting section is connected to the bottom of the both reservoirs through a filler tube. |
