Ultra-thin rotating disk gas diffuser (and bubble shearing metho

Details Ultra-thin rotating disk gas diffuser (and bubble shearing metho Ultra-thin rotating disk gas diffuser (and bubble shearing metho

1978-05-25

1980-10-14

Lutter, Frank W.

Gas and liquid contact apparatus

Contact devices

Rotating

261 93, 261DIG71, 210221R, 210221P, 209170, C02C 504

Patent

active

042281121

ABSTRACT:
A rotating gas diffuser for shearing fine gas bubbles from the surface thereof when the diffuser is immersed in a body of liquid and rotated therein. The rotatable shaft of the diffuser carries a disk like member defining at least one gas plenum having a porous wall out of which gas introduced into the plenum can pass to form nascent gas bubbles which are then sheared off by the viscous shear forces exerted by the liquid in which the disk is rotating. Preferably both the top wall and the bottom wall forming the gas plenum or plenums are porous. The ratio of the overall diameter of the disk to the maximum thickness of the disk in the gas diffusing area occupied by the plenums is at least about 32:1. Improved results are obtained when this ratio is at least about 48:1, more improvement is obtained with a ratio of at least about 64:1, and still greater improvement with a ratio of at least about 128:1. The preferred value of the ratio is at least about 256:1.

REFERENCES:
patent: 3650513 (1972-03-01), Werner
patent: 3917763 (1975-11-01), Schafer
patent: 3927152 (1975-12-01), Kyrias
patent: 3992491 (1976-11-01), Ihrig et al.
AIAP Journal, vol. 9, No. 2, Feb. 1971, "Turbulent Boundary Layer on a Rotating Disk", by Paul Cooper, pp. 255-261.
Elements of Physics, by Smith, 1948, McGraw-Hill, pp. 149-150.

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