Abstract: A device for automatically detecting and removing air from a gas mixture of an organic gas and air includes calculating a saturation pressure value based on a temperature of the gas mixture in a reservoir 1, and obtaining a pressure threshold value by adding a margin value to the saturation pressure value. When the pressure value inside the reservoir 1 is higher than the pressure threshold value, air is detected to be in the gas mixture. After this detection, a controller 5 pressurizes and introduces the gas mixture into a pressure container 2 to condense the organic gas in the gas mixture, thus producing a diluted gas mixture. Subsequently, the diluted gas mixture is introduced to a supply side of a membrane unit 3, the organic gas in the diluted gas mixture is recovered at a permeation side thereof, and a residual gas is discharged outside of the device.

Abstract: A device for automatically detecting and removing air from a gas mixture of an organic gas and air includes calculating a saturation pressure value based on a temperature of the gas mixture in a reservoir 1, and obtaining a pressure threshold value by adding a margin value to the saturation pressure value. When the pressure value inside the reservoir 1 is higher than the pressure threshold value, air is detected to be in the gas mixture. After this detection, a controller 5 pressurizes and introduces the gas mixture into a pressure container 2 to condense the organic gas in the gas mixture, thus producing a diluted gas mixture. Subsequently, the diluted gas mixture is introduced to a supply side of a membrane unit 3, the organic gas in the diluted gas mixture is recovered at a permeation side thereof, and a residual gas is discharged outside of the device.