Crystallizing apparatus

Details Crystallizing apparatus Crystallizing apparatus

1986-12-19

1989-01-31

Pal, Asok

Chemical apparatus and process disinfecting, deodorizing, preser

Physical type apparatus

Crystallizer

62 66, 62 67, 422246, 422248, 422252, B01D 900, B01D 902

Patent

active

048014362

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.

REFERENCES:
patent: 3137544 (1964-06-01), Ebner
patent: 3996018 (1976-12-01), Midler, Jr.
patent: 4291550 (1981-09-01), Engdahl et al.
patent: 4318772 (1982-03-01), Kragh

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