| 摘要 |
A hydrodynamic stirring device which dissolves, mixes or puts back into suspension or into a "sol" in a primary liquid phase, a deposited sediment which is contained in a tank and covered by the primary liquid phase including suction means including at least one pump to remove liquid from the primary liquid phase in the tank, and injection means connected to a discharge side of the suction means and-equipped for reinjecting the liquid into the tank, towards the deposited sediment, in the form of at least one jet having a predefined pressure and flow rate, the injection means including at least one tube which bears at an end portion thereof, a self-rotating lance, the lance including a hollow cylindrical stator which is open at both of its end portions and which is connected through a first of its end portions to the tube and a nozzle bearing rotor which is rotatably mounted on the stator, at its second end portion, and which bears at its periphery at least two nozzles or jets, at least one of the nozzles or jets having an orifice directed to have a tangential component with respect to the nozzle bearing rotor, wherein the nozzles are arranged such that the resultant of the radial components is canceled out.
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