Distillation: apparatus – Apparatus – Systems
Patent
1976-06-25
1978-08-08
Bascomb, Jr., Wilbur L.
Distillation: apparatus
Apparatus
Systems
202180, 202197, 159 2MS, 203 11, B01D 126, B01D 306
Patent
active
041055055
ABSTRACT:
A flash evaporator to be used for purposes such as distilling sea water has a series of evaporator stages in which vapor derived from liquid flowing through the successive evaporator stages is condensed to form a distillate. A wall structure situated in each evaporated stage defines therein an elongated narrow gap the length of which is substantially greater than the width of each evaporator stage with this gap forming an orifice through which the liquid is compelled to issue while flowing from an inlet to an outlet of each evaporator stage. Between the inlet and the gap in each evaporator stage the wall structure defines an upstream flow path the cross section of which decreases from the inlet toward the gap. From the gap toward the outlet of each stage the wall structure defines a downstream flow path the cross section of which increases from the gap toward the outlet. Each evaporator stage has an interior space communicating with the liquid flowing along the downstream flow path to receive vapor therefrom, and in this space is situated a condenser for condensing the vapor, this condenser being situated at an elevation lower than the free surface of the liquid flowing along the downstream flow path. The vapor flowing toward the condenser in each stage is directed centrifugally against the inner surface of an outer shell of each stage so that any liquid droplets entrained with the vapor deposit themselves against the inner surface of the shell, and troughs are carried by the inner surface of the shell to collect the droplets so that the latter cannot travel with the vapor to the condenser.
REFERENCES:
patent: 3161558 (1964-12-01), Pavelic et al.
patent: 3192132 (1965-06-01), Loebel
patent: 3197387 (1965-07-01), Lawrence
patent: 3214350 (1965-10-01), Lichtenstein
patent: 3326280 (1967-06-01), Bosquain et al.
patent: 3580816 (1971-05-01), Tidball et al.
patent: 3856630 (1974-12-01), Gilbert
patent: 3879265 (1975-04-01), Margen
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