| 摘要 |
This invention relates to a device for supplying a gas, preferably air, to a liquid intended to be purified by means of a biological treatment. The device is comprising a plurality of distribution tubes (5) which radially like arms are connected to a central rotatable tube (2) which is closed at its upper end. The radially arranged distribution tubes are provided with holes or nozzles (7) directed in the horizontal plane perpendicular to the distribution tubes and the distribution tubes are also connected to floating means which will float on the surface of the liquid treated and keep the distribution tubes at a fixed level underneath the level of the liquid surface. The rotatable tube connected to said distribution tubes is telescopically journalled on a stationary tube 1 which is connected to a source of pressurized gas. When pressurized gas from the stationary tube 1 is supplied to the distribution tubes the gas will escape through said holes or nozzles in the form of fine jets and the gas will be mixed with the liquid at the same time as the action- and reaction forces from the gas jets will give the device a rotating movement. |
