| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an agitating aerator capable of supplying the large amt. of air with small power and capable of supplying oxygen to a treated liq. in an aeration tank at a high supply rate. SOLUTION: This device is provided with an impeller 13 for delivering a treated liq. and a casing 40 in which a discharge port 46 for discharging a treated liq. delivered from the impeller 13 is provided vertically above the impeller 13. The casing 40 is provided with a treated liq. passage 44 for conducting the treated liq. delivered from the impeller 13 to the discharge port 46 and provided on the downstream side of the impeller 13, the extension of the discharge port 46 has the height of V in the vertical direction, an air discharge port 52 for discharging pressurized air in the treated liq. is provided to the passage 44 and the vertical installation position of the air discharge port 52 is within or above the vertical height of V of the discharge port 46. Consequently, since the vertical installation position of the air discharged port is at a position more than within the vertical height of the discharged port, the installation position is positioned at the shallow position of the water depth and the necessary pressure of the pressurized air is lowered as much as the position.</p> |
