Distillation: apparatus – Apparatus – Systems
Patent
1993-07-16
1995-04-25
Bascomb, Jr., Wilbur
Distillation: apparatus
Apparatus
Systems
202182, 202197, 202236, 202269, 159 63, 159 7, 159 111, 159 171, 159 172, 159DIG42, 203 11, 203 26, B01D 122, B01D 126, B01D 128
Patent
active
054095760
ABSTRACT:
A rotating evaporator device is disclosed for the distillation or concentration of liquids. The rotating evaporator device of the present invention utilizes a multiplicity of pairs of disks wherein each disk pair forms a cavity within which heating vapor condenses on the interior surfaces of the disk pair and evaporation occurs from a thin film of distilland deposited on the outside surfaces of the disk pair by means of flexible wipers pressing on the outside surfaces of the disk pair. The centrifugal force created by the rotation of the disks causes the distillate and distilland films to be very thin resulting in very high heat transfer coefficient. The pairs of disks are joined together at the inside peripheries and are rotated about a stationary hollow shaft wherein heating vapor is introduced into the cavities through ports in the shaft and stationary scoops are connected to the shaft to withdraw the condensate from the circumferential peripheries of the cavities. The pairs of disks in combination with the stationary shaft form a rotor assembly which is secured in a sealed chamber where the disks are rotated by a drive shaft extending into the chamber. One or more rotor assemblies can be installed in each chamber together with rotary demisters to prevent distilland droplets from contaminating the generated vapor. A plurality of these chambers together with the other components are contained in a sealed housing configured to operate in multiple effect so that the generated vapor from one effect is used as the heating vapor in the following effect. The combination of these components form a module which can be used in thermally driven multiple effect distillation and or vapor compression distillation.
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