Distillation: processes – separatory – Water purification only – Under pressure or vacuum
Patent
1979-10-12
1982-12-28
Sever, Frank
Distillation: processes, separatory
Water purification only
Under pressure or vacuum
202196, 202205, 202234, 202235, 203 91, B01D 310
Patent
active
043660304
ABSTRACT:
Method and apparatus for distillation of liquids such as sea water, brackish water, waste water, or the like, which also may be used for cooling purposes, are disclosed. The apparatus includes a vacuum tank, or vessel, into which liquid to be distilled, such as saline water, is fed to partially fill the tank. If desired, heating means may be included for heating the liquid adjacent the surface thereof to promote evaporation thereof. Vapor from the region above the liquid surface is fed to vapor condensing means adjacent the bottom of the tank for condensing the same. A condensate discharge tube extends downwardly from the condensing means for discharge of condensate therefrom. Means including a pressure head of condensate within the condensate discharge tube maintains a subatmospheric pressure within the tank to promote evaporation of liquid contained therein. A drain tube may be included which extends downwardly from the tank for use in draining sludge, froth, concentrated saline solution, or the like, from the tank. A pressure head of liquid is contained in said drain tube to maintain the tank at the subatmospheric pressure. Cold liquid adjacent the bottom of the tank may be used for external cooling purposes, if desired.
REFERENCES:
patent: 491028 (1893-01-01), Thomas et al.
patent: 2490659 (1949-12-01), Snyder
patent: 4172767 (1979-10-01), Sear
Beckman Victor R.
Sever Frank
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