Concentrating evaporators – Processes
Patent
1982-09-17
1985-05-21
Garris, Bradley
Concentrating evaporators
Processes
159 16R, B01D 114, B01D 500, B01D 1200, F26B 700
Patent
active
045184585
ABSTRACT:
Process and apparatus for removing light oil from solids. The invention is particularly applicable to the removal of residual light oil from solids obtained in a process where aqueous solids are mixed with a light fluidizing oil and subjected to dehydration by heat evaporation. 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 heat evaporation 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. The solids carrying residual light fluidizing oil are then brought into direct contact with a hot, inert gas, referred to herein as "blowing gas." The hot, inert blowing gas effects the removal of the residual light oil from the solids. Light oil vapor removed from these solids is separated from effluent blowing gas by condensation and recovered. Effluent blowing gas, free of light oil vapor, may be recycled.
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Bonanno Anthony J.
Casparian Robert E.
Greenfield Charles
Cannaday Richard L.
Garris Bradley
Hanover Research Corporation
Ungvarsky William J.
Yates Edwin T.
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