Gas and liquid contact apparatus – Contact devices – Rotating
Patent
1994-08-04
1995-10-03
Scherbel, David A.
Gas and liquid contact apparatus
Contact devices
Rotating
366264, 366270, 366302, 366314, B01D 4716
Patent
active
054549868
ABSTRACT:
Improved mixing effectiveness in the mixing of a gas with a liquid suspension is achieved in a batch mixing system having a mixing tank with a hemi-toroidal tank bottom which extends between a radially inner neck portion of the tank to a radially outer cylindrical wall portion of the tank. The hemi-toroidal profile of the tank bottom has a monotonically increasing toroidal radius between the neck and wall portions. Disposed within the tank is an assembly including an axial flow impeller with pitched impeller blades, a stator adjacent to the impeller and having stationary stator blades of a pitch opposite to the pitch of the impeller blades, a shroud surrounding the radial periphery of both the impeller and the stator and a gas sparging means supported by the shroud. The arrangement of the assembly provides in conjunction with the hemi-toroidal tank bottom a substantially swirl-free laminar flow of the liquid suspension directed downwardly along the neck portion and along the tank bottom when the impeller is rotatably driven by a drive shaft.
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Lukacher M.
Scherbel David A.
Soohoo Tony G.
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