Gas separation – Means within gas stream for conducting concentrate to collector
Patent
1986-02-18
1987-06-02
Prunner, Kathleen J.
Gas separation
Means within gas stream for conducting concentrate to collector
55 2, 55131, 55135, 55152, 55154, 55DIG38, 55137, B03C 304, B03C 341
Patent
active
046700269
ABSTRACT:
An apparatus for extraction of water droplets from air includes a corona array including an array of conductive pointed needles with a high voltage thereon adjacent to a grounded conductive collector. Water droplets are exposed to a strong electrostatic field gradient, causing water droplets in incoming air to rotate and move along the electric field gradient lines toward the shanks of the needles and coalesce thereon, forming larger droplets. The droplets move under the influence of an increasing field gradient toward the needle points, acquiring electrostatic charge from the needle. The droplets eventually are repelled from the needles, when electrostatic repulsion forces on the droplets exceed adhesion forces that decrease as the droplets increase in size during their migration. The repulsed droplets move under the influence of electric field to the collector. The resulting liquid accumulating on the collector is removed to reduce re-evaporation into the air. In one embodiment, the temperature of the needles are kept below the condensation point, and polar water molecules are directed by the gradient to the needle shanks.
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Desert Technology, Inc.
Prunner Kathleen J.
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