| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an underwater air mixer with which sufficient aeration and agitation effect can be obtained by accelerating discharging water flow so as to extend the distance of discharging, reducing an interference with a water path on the suction side by an air lift and extending the reaching distance of air mixed with the water flow so as to extend the residence time of the air in a tank. SOLUTION: The outer periphery of an axial flow impeller 3 is surrounded by a bell mouth-shaped draft ring, a straightening plate 5 in the shape of an umbrella is provided under it, a bottom plate 9 communicated with an air introduction pipe 8 is provided under the plate 5 to form an air chamber, an opening part and a closed part are located separately at an outer peripheral part between the opposing surfaces of the ring 4 and the plate 5, partitions 14...14 are connected vertically so that the opening part may be a plurality of lines of water discharge grooves 13...13 guided in a tangent direction, and diffusion paths 15...15 opening to an outer peripheral surface introduced into the grooves 13...13 from the inside of the chamber 10 is provided.</p> |
