Method and apparatus to convert a long tube vertical...

Details Method and apparatus to convert a long tube vertical... Method and apparatus to convert a long tube vertical...

B - Operations, Transporting

01

D

161/10

B01D 1/22 (2006.01) B01D 1/06 (2006.01) B01D 1/12 (2006.01) B01D 3/06 (2006.01)

Patent

CA 1260382

ABSTRACT A method and apparatus for converting a long tube vertical evaporator to a falling film evaporator in a manner which permits salvaging most of the long tube vertical evaporator structure. The bottom chamber of the existing evaporator is extended to define a flash chamber intermediate the existing heat exchanger chamber and the bottom chamber. A vapor riser conduit is provided for directing vapor from the flash chamber to the vapor separation chamber positioned above the heat exchanger chamber. A recirculation conduit is provided for directing liquid from the bottom chamber therethrough into a distribution chamber which is provided above and in communication with the upper ends of the heat exchange tubes positioned in the heat exchanger chamber. The distribution chamber is preferably provided with a plurality of spray nozzles which communicate with the recirculation conduit to evenly distribute a film of liquid downwardly through the heat exchange tubes.

526199

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