Number of mass transfer units and theoretical plates in a packed absorption tower~
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There’s one issue I don’t understand: many people know that the height of a packed tower equals the number of mass transfer units multiplied by the height of each mass transfer unit, or the number of theoretical plates multiplied by the height of each theoretical plate. For absorption processes, the books provide detailed methods for calculating the number of mass transfer units, but there are no methods for calculating the number of theoretical plates! In the selection of packing, in many cases it is the manufacturer who provides the equivalent plate height of the packing; this value is used when calculating the tower height, and it is more widely applied. I would like to ask whether there is any connection between the method based on the number of mass transfer units and the method based on the number of theoretical plates? How to calculate the number of theoretical plates for absorption operations?
I have a friend who specializes in design; you can contact him. QQ709996546
The number of mass transfer units can be simply regarded as the number of theoretical plates, and the height of each mass transfer unit can be taken as the height of one theoretical plate. These are essentially theoretical calculations. However, if you want to actually design an absorption tower, you need to accurately estimate the HETP value of the packing, which requires the accumulation of experimental data and experience