| 摘要 |
<p>1287754 Aerating apparatus AMES CROSTA MILLS & CO Ltd and F SANDERSON 4 May 1970 [8 May 1969] 23412/69 Heading B1C Surface aeration apparatus, e.g. for treating sewage, in which blades 6 on a rotor 5 located at the liquid surface 16 fling the liquid outwards to aerate it, has a shroud 19 to deflect at least some of the liquid discharged by the rotor. The shroud may be flat, or dished as shown, preferably with the edge lying in a plane, and may be used to reduce the area covered by the trajectory of the liquid, or to modify the shape of the area. For example to enable square aeration tanks to be used efficiently. The shroud may be fixed or mounted adjustably on a concrete bridge 15 on which the gearbox 10 is mounted.</p> |
