Distillation: processes – separatory – Water purification only
Patent
1990-06-21
1991-12-31
Bascomb, Jr., Wilbur
Distillation: processes, separatory
Water purification only
203 21, 203 22, 203 26, 203 39, 203 47, 203 73, 203100, 203DIG8, 203DIG25, 159 241, 159 29, 159 46, 159 473, 159DIG25, 202173, 202176, 202177, 202182, 202204, B01D 128, C02F 104
Patent
active
050768956
ABSTRACT:
Process and apparatus for recovering clean water and solids from aqueous solids are disclosed. Aqueous solids are mixed with a low viscosity, relatively volatile, water-immiscible light fluidizing oil to obtain a mixture which will remain fluid and pumpable after removal of essentially its entire water content. The mixture of solids, water and fluidizing oil is subjected to a dehydration step by means of a plurality of mechanical vapor recompression evaporators operating in staged array whereby substantially all of the water and at least part of the light oil are evaporated and subsequently recovered. The light fluidizing oil is then largely separated from the solids. Residual fluidizing oil may be removed from the solids by direct contact with a hot blowing gas such as blowing steam. The invention is characterized by the conservation of energy through the use of heat exchangers whereby condensate gives up its heat to the feed.
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"Development of an Efficient Biomass Drying Process and Its Commercial Use for Energy Recovery" by Clifton James Crumm II, ("Crumm Article").
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Casparian Robert E.
Greenfield, deceased Charles
Bascomb, Jr. Wilbur
Cannaday Richard L.
DeRosa Frank J.
Hanover Research Corporation
Yates Edwin T.
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