Briefly describe the heat balance of a distillation tower?
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Briefly describe the heat balance of a distillation tower?
Heat balance refers to the equilibrium between the heat entering the tower and the heat leaving it. This is specifically reflected in the tower top temperature; heat balance is the basis for mass balance and gas-liquid balance, and in turn it depends on them as well. Without a hot vapor phase and a cold reflux, the entire distillation process cannot take place. And as the operating pressure and temperature of the tower change (resulting in changes in the composition at the gas-liquid equilibrium), the heat released due to vapor condensation in the gas phase and the heat absorbed due to liquid vaporization on each tray also change accordingly.