C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/16 (2006.01) B01F 3/04 (2006.01) C02F 3/02 (2006.01) C02F 3/12 (2006.01)
Patent
CA 2589462
Apparatus for aerating waste water, provided with a container for waste water and a rotor which is rotatable about a substantially vertical axis (1) and the downward directed part of which can reach into the waste water, which rotor comprises blades (4) having surfaces which are orientated substantially radially and axially, wherein a surface (12) curved in the direction of rotation of the rotor is present close to the upper edge (8) of a blade (4) , and wherein the curved surface close to the upper edge forms an angle of between 10~ and 60~ with the vertical plan of the blade .
L'invention concerne un appareil et un procédé pour aérer les eaux usées, l'appareil étant muni d'un récipient pour eaux usées et d'un rotor qui peut effectuer des rotations autour d'un axe vertical (1) et dont la partie orientée vers le bas peut atteindre les eaux usées. Le rotor comprend des ailettes (4) comportant des surfaces orientées de façon sensiblement radiale et axiale, une surface (12) incurvée dans la direction de rotation du rotor étant proche du bord supérieur (8) d'une ailette (4), et la surface incurvée proche du bord supérieur formant un angle entre 10° et 60° avec le plan vertical de l'ailette.
Gowling Lafleur Henderson Llp
Visser Andries
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