Patent ID: 6328466
Filing Date: 2001-12-11
Classification: B01F

Abstract:
A stirring blade unit comprising:a rotatable shaft;a disc for preventing gas bubbles from going up through a top of said stirring blade unit, wherein said disc is fixedly attached to and rotates with said rotatable shaft;a plurality of blades for gas-liquid mixing, wherein each of said plurality of blades has a first end which is fixedly attached to said disc at an end of said disc which is opposite of where said disc is fixedly attached to said rotatable shaft;a perforated cylinder rotating together with said rotatable shaft by way of said perforated cylinder being formed around said plurality of blades attached to said disc and a second end of each of said plurality of blades being fixedly attached to an inner surface of a sidewall of said perforated cylinder at an approximately central portion of said perforated cylinder, wherein said perforated cylinder has perforations in said sidewall thereof, said perforations making up approximately 30 to 50% of an area of said sidewall of said perforated cylinder.