MIXED LIQUID SEPARATION METHOD AND DEVICE

PROBLEM TO BE SOLVED: To improve efficiency of recovering one liquid from mixed liquid.SOLUTION: A mixed liquid separation method is to separate one liquid from mixed liquid containing at least first liquid and second liquid 32 having a higher boiling point than the first liquid. In a separation vessel 16 which is cylindrical with an inner diameter of an upper edge section, where an exhaust port 26A is arranged in a central portion thereof, larger than the inner diameter of a recovery port 40 arranged at a lower edge section thereof, the mixed liquid separation method performs a separation process to: separate the second liquid 32 from mixed gas flowing into the separation vessel 16 through an inflow port 16A by utilizing centrifugal force; recover the same through the recovery port 40; and exhaust the mixed gas from which the second liquid 32 is separated through the exhaust port 26A.