In a distillation tower, what is the relationship between the heat load of the reboiler and the cooling load of the cooler?
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This post was last edited by *nht1 on 2017-3-29 12:54. What is the relationship between the heat load of the reboiler and the cooling load of the cooler in a distillation column? Under what conditions are the heat load and cold load equal?
In a distillation tower, regarding the heat load of the reboiler and the cooling load of the cooler, if the former increases, then with the same product withdrawal rate, the latter also increases.
This should be related to the thermal state of the feed
Under full recirculation, the cooling and heating loads are equal
During normal operation of a distillation column, reboiling and condensation are directly proportional to each other. It’s not a linear relationship; factors such as feed conditions and reflux need to be considered. Tower operation has its thermal equilibrium.
In the full recirculation mode, the cooling and heating loads are equal
Total tower heat balance calculation: Heat introduced by feed + Heat from reboiler steam + Heat introduced by reflux = Heat removed from the bottom of the tower + Heat removed from the bottom of the tower + Heat exchanged with the environment. The heat for cooling the tower top is related to the reflux heat and the heat removed from the tower top