Distillation: processes – separatory – Water purification only
Reexamination Certificate
2005-01-13
2008-10-07
Manoharan, Virginia (Department: 1797)
Distillation: processes, separatory
Water purification only
C203S011000, C203S090000, C203S094000, C203S098000
Reexamination Certificate
active
07431806
ABSTRACT:
A sub-atmospheric pressure desalinating still employs a closed top, open bottom pipe filled with source water to be distilled, such as seawater, having a height greater than the height of a column of seawater that can be supported by the pressure at the bottom of the tank so that a subatmospheric pressure volume is formed at the top. Water from the source is also pumped into the subatmospheric volume and passed through an evaporator which enlarges its surface volume. A small percentage of the water is vaporized and the balance is cooled to provide the heat of vaporization and falls into the top of the seawater column, creating a downward flow. The vapor is drawn from the vacuum and condensed, preferably in a second subatmospheric volume above a column of fresh water.
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Gifford Krass Sprinkle Anderson & Citkowski P.C.
LEV Group, LLC
Manoharan Virginia
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