Patent ID: 7708895

Claim:
A method for demulsifying water-oil emulsions through ultrasonic action, comprising a step of making water-oil emulsions flow through at least one ultrasonic acting region in a flow direction from an upstream end to a downstream end of the at least one ultrasonic acting region, characterized in that: within said ultrasonic acting region, a concurrent ultrasonic wave whose traveling direction is the same as the flow direction of said water-oil emulsions is generated by at least one first ultrasonic transducer provided at the upstream end of said ultrasonic acting region, and at same time, a countercurrent ultrasonic wave whose traveling direction is opposite to the flow direction of said water-oil emulsions is generated by at least one second ultrasonic transducer provided at the downstream end of said ultrasonic acting region; and the concurrent ultrasonic wave and the countercurrent ultrasonic wave act simultaneously on the water-oil emulsions flowing through said ultrasonic acting region, so as to demulsify said water-oil emulsions.