Agitating – Stirrer within stationary mixing chamber – Rotatable stirrer
Patent
1998-11-18
2000-11-21
Cooley, Charles E.
Agitating
Stirrer within stationary mixing chamber
Rotatable stirrer
36632594, 3663291, B01F 732
Patent
active
061492965
ABSTRACT:
A mixer blade assembly is provided for medium and high viscosity liquid which does not cause the generation of an insufficiently mixed region of a doughnut-shaped configuration within the liquid to be mixed and therefore has excellent mixing performance. The mixer blade assembly for medium and high viscosity liquid includes a rotary shaft including at least two support posts spaced apart from each other; a plurality of plate-shaped inclined blades secured on each of the support posts and spaced apart from each other into multiple stages, the leading edge of each of the blades being displaced rearwardly or forwardly as viewed from the axis of blade rotation from the upper stage to the lower stage; and a bottom impeller secured on the support posts and being located in proximity with the bottom surface of the mixing vessel. The generation of an unmixed region of a doughnut-shaped configuration within the liquid can be eliminated due to generation of a one loop flow pattern within the mixing vessel, and an excellent mixing performance can be achieved for liquids with a wide range of Reynolds number due to suppression of the delamination of flow flowing over the upper surface of each blade.
REFERENCES:
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patent: 4515483 (1985-05-01), Muller et al.
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patent: 4854720 (1989-08-01), Schold
patent: 5683178 (1997-11-01), Nakamoto et al.
Asai Mikio
Katou Yoshikazu
Cooley Charles E.
Satake Chemical Equipment Mfg., Ltd.
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