Process and apparatus for breaking up foam into its liquid and gaseous components
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United States of America Patent
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Sep 1, 1992
Grant Date -
N/A
app pub date -
Jun 24, 1991
filing date -
Jun 29, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process of breaking up a foam into a liquid component and a gaseous component by action of centrifugal forces, includes drawing the foam axially into a centrifugal fan device by suction; then, accelerating the foam radially by centrifugal forces over a plurality of ribs and/or baffles, forcing the liquid component through a peripheral liquid discharge outlet; feeding the gaseous component through at least one gas outlet prior to forcing the liquid component through the liquid discharge outlet; advantageously feeding the gaseous component in a radial direction opposite to that in which the foam flows in the fan device, and after that, conducting the gaseous component axially through a gas outlet. The apparatus for performing the process includes a centrifugal fan acting as a pump impeller having an upper plate and a lower plate connected by a plurality of ribs and a conical cutoff cover located above the centrifugal fan acting to guide gas component flow, an axially-located foam inlet, a gas component outlet located above the cutoff cover near the rotation axis of the fan and a liquid discharge outlet formed between the cutoff cover and the lower plate at the periphery of the centrifugal fan.
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