Pulsed Column
Source: Koch Extraction Technologies, Inc.
The Pulsed Column consists of a vessel shell and a cartridge assembly of "disc and donut" internals
Koch Extraction Technologies, Inc.Column consists of a vessel shell and a cartridge assembly of "disc and donut" internals. Attached to the bottom side of the column is the pulse leg. Compressed air is alternately admitted and vented from the pulse leg by means of a timer/solenoid valve arrangement. When air enters the pulse leg, it forces the liquid downward, and this displacement of liquid causes the liquid in the main column to rise. When the air exhausts from the pulse leg, the process is reversed. This continuous rising and falling of the column liquid past the disc and donut internals causes turbulence, and therefore droplets, so that mass transfer can take place.
Besides disc and donut internals, sometimes random packing, structured packing, or sieve trays are used.
This column has been used primarily in the nuclear and inorganic chemical industries. The vessel shell and internals can be constructed out of any metal, or out of FRP, depending upon the process fluids being handled.
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