Agitating – Stirrer within stationary mixing chamber – Pump type
Patent
1980-12-30
1982-11-09
Coe, Philip R.
Agitating
Stirrer within stationary mixing chamber
Pump type
B01F 512
Patent
active
043582060
ABSTRACT:
Improved draft tube mixing apparatus having one or more of the following features: (a) controlled circulation at the inlet of the tube which allows operation at reduced submergence by preventing formation of a vortex; (b) an additional passage for controlled flow into the draft tube along its length to allow operation without the tube being entirely submerged; (c) the recovery of dynamic energy from the flow at the outlet of the tube by wide area diffusion without separation from the walls of the tube in the diffusing region thereof; (d) improved guidance of radially directed to axially directed flow at the inlet of the draft tube for efficient axial pumping by the impeller by maintaining generally uniform axial flow velocity radially of the impeller; and (e) separation of coarse and fine particles in suspension in the tank to allow selective draw-off of the coarse and/or fine particles thereby increasing efficiency of mixing.
REFERENCES:
patent: 3737288 (1973-06-01), Hochman
patent: 3893920 (1975-07-01), Hubbard et al.
Coe Philip R.
General Signal Corporation
Lukacher Martin
Mednick Jeffrey S.
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