Method of, and apparatus for, agitating treatment liquid

摘要

An apparatus for agitating a treatment liquid has a vessel for containing therein the treatment liquid. A turbine is rotatably provided inside the vessel. The turbine has a radius which extends close to an internal surface of the vessel. The turbine is rotated at a peripheral velocity of above about 20 m/sec by an electric motor. A flow cutoff ring is disposed along the internal surface of the vessel in a position above the turbine. When the treatment liquid is rotated by the turbine at a high speed, the treatment liquid is brought into a close contact with an internal surface of the vessel in a shape of a substantially hollow cylindrical film.