Patent ID: 7703752

Claim:
A method for dissolving a gas or a gas mixture in a liquid in which the liquid is introduced into a chamber ( 6 ) via an inlet ( 2 ), in connection with which an eddy movement is created in the chamber for mixing the gas and liquid, and in which the gas is introduced into the liquid before the liquid is introduced into the chamber, after which the liquid with the dissolved gas can be removed via an outlet ( 4 ), wherein the liquid is introduced into the chamber ( 6 ) tangentially creating an eddy rotating about a mainly horizontal axis in a mainly cylindrical chamber shaped in such a way that essential pressure loss in the chamber is avoided and where the pressure of the liquid is 0.3 to 1 bar, where the liquid with dissolved gas is supplied to a tank from the outlet ( 4 ) arranged tangentially to the chamber ( 6 ) via pipes ( 7 , 8 ) and nozzles ( 10 ) submerged in the fluid in the tank, where the pressure is released.