Crystallizing apparatus
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United States of America Patent
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-
Jan 31, 1989
Grant Date -
N/A
app pub date -
Dec 19, 1986
filing date -
Dec 19, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for growing free-floating, buoyant crystals to a predetermined size. Crystals having a positive buoyancy such as water crystals (ice) grow due to immersion in a stream of supercooled feed water that flows downward in a tapered incubation duct with a velocity that decreases as the cross-sectional area of the duct increases with increased depth. As the crystals grow, their terminal buoyant velocity increases until it exceeds the peak stream velocity. At this time the crystals float upward and out of the apparatus. A plurality of interconnected incubation ducts may be stacked vertically one above the other. The apparatus may be combined with apparatus to grow free-floating crystals having a negative buoyancy from a supersaturated salt solution that is discharged from the bottom of the apparatus for growing crystals having a positive buoyancy.
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Cited Art Landscape
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