Refrigeration – Processes – Fractionally solidifying a constituent and separating the same
Patent
1987-10-27
1989-01-24
Capossela, Ronald C.
Refrigeration
Processes
Fractionally solidifying a constituent and separating the same
62124, B01D 904, C02F 122
Patent
active
047999454
ABSTRACT:
A water purification method and system, employing at least a first chamber and a second chamber to freeze a portion of a volume of impure water in the first chamber while melting ice in the second chamber. The unfrozen liquid, which has a high impurity concentration, is drained from the first chamber. The melted ice, from which up to 95% of the original impurities have been rejected during the freezing operation, is drained from the second chamber. Then, a new volume of impure water is supplied to the second chamber, and the process continues with the roles of the chambers reversed. The system includes at least one heat transfer fluid coil portion wrapped around (or disposed within) each chamber. The system requires no scraping or transporting of frozen ice, requires no chemical or cartridge replacement, and can be embodied in a small housing suitable for use as a home or restaurant appliance. The chamber dimensions and the duration of each freezing operation are optimized to maximize the rejection of impurities, given the freezing chamber temperature attainable by the heat transfer fluid coil and the desired system throughput rate.
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Freeze Crystallization James A. Heist, Chemical Engineering; May 7, 1979; pp. 348-358.
Capossela Ronald C.
Polar Spring Corporation
Smith A. C.
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