| 摘要 |
PROBLEM TO BE SOLVED: To provide a dehumidification system capable of performing more efficient dehumidification, and a method of producing dry air.SOLUTION: A dehumidification system 1 includes: a gas separation membrane module 20 which separates vapor in a raw material gas through a hollow fiber membrane, and extracts dry air from a primary side and wet air from a secondary side; raw material gas supply means 15 for pressurizing the raw material gas and supplying it to the gas separation membrane module; depressurizing means 25 for depressurizing the secondary side; and purge gas supply means 22 for supplying a purge gas to the secondary side. The raw material gas supply means pressurizes the raw material gas to 200-1,000 kPaG, and supplies the raw material gas. The depressurizing means 25 depressurizes the secondary side so that the pressure ratio P2/P1 of the absolute pressure P1 of the gas on the primary side and the absolute value P2 of the gas on the secondary side is 0.05 or less. |
