| 摘要 |
PURPOSE:To enhance the removal efficiency of a dissolved component by promoting degassing, by separately supplying unpurified oil and recycle oil to a packing layer. CONSTITUTION:An oil sprayer 8b is provided in a vacuum degassing tank 7 other than an oil sprayer 8a for spraying unpurified oil 18 and the recycle oil 17 taken out from the vacuum degassing tank 7 is sprayed from the oil sprayer 8b while inert gas 22 is leaked into the vacuum degassing tank 7 through a leak value 23. Unpurified oil is sprayed into a vacuum atmosphere under atmospheric pressure to perform degassing in a boiling state and gas other than the gas component dissolved in oil is leaked to the vacuum degassing tank to lower the partial pressure of a gaseous phase dissolved component and gas separated from oil is carried out of the degassing tank by the leaked gas. |
