| 摘要 |
PURPOSE:To condense to isolate high molecular weight gas and to obtain compressed low molecular weight gas having high purity by adding the high molecular weight gas to the low molecular weight gas thereby to raise mean gas density to easily centrifugally compress and cooling, after the centrifugal compression, mixture gas. CONSTITUTION:High molecular weight gas to be added has conditions of higher density and boiling point than those of gas to be pressurized. Mixture gas of helium and Freon is fed to a centrifugal compressor 2. Since the mixture gas becomes high density by the addition of the Freon, it is easily compressed to high pressure. It is preliminarily cooled by a water cooler 3, and most Freon is liquefied to be separated. Freon gas is liquefied to be separated by utilizing saturated temperature difference of both the gases thereby to obtain helium gas of high pressure and high purity. The Freon can be efficiently removed by the introduced gas by means of regenerative heat exchange, the mixture gas can be effectively cooled thereby to generate helium gas of high purity in high thermal efficiency. |
