Patent ID: 7338551
Filing Date: 2008-03-04
Classification: B01F

Abstract:
1. A method of generating micro bubbles in a liquid comprising the steps of: providing a flow-through channel containing at least two local constrictions of flow therein, the at least two local constrictions include a first and second local constrictions of flow; passing the liquid at a velocity of at least at least 12 m/sec through the first local constriction of flow to create a first hydrodynamic cavitation field downstream from the first local constriction of flow; introducing a gas into the liquid in the first local constriction of flow, thereby creating gas-filled cavitation bubbles; collapsing the gas-filled cavitation bubbles formed in the first hydrodynamic cavitation field to dissolve the gas into the liquid, thereby forming a gas-saturated liquid; passing the gas-saturated liquid through the second local constriction of flow to create a second hydrodynamic cavitation field downstream from the second local constriction of flow; and extracting the dissolved gas from the gas-saturated liquid, thereby generating micro bubbles in the liquid.