| 摘要 |
An aeration apparatus is used for injecting fine air bubbles into a liquid undergoing treatment to remove material from the liquid by flotation with the bubbles. The apparatus includes a hollow impeller, a drive shaft connected to the impeller and a motor for rotating the drive shaft and impeller. The impeller has a plurality of openings in at least its upper major surface through which air exits from the hollow interior of the impeller. A shearing mechanism is located adjacent to, and downstream of, the openings, for reducing the size of the air bubbles exiting the openings. In one embodiment, a propeller is located adjacent to, and immediately above, the impeller, for producing a supplemental flow of liquid over the upper surface of the impeller. |
