【Q&A Question 031】2016.05.21
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【Q&A Question 031】May 21, 2016: What is the role of reflux at the top of a distillation column? The answer key will be available after responding; scoring is based on addressing the key points. Remove excess heat from the tower to maintain thermal balance.
Prevent backflow of water, separate oil, gas, and water
It provides liquid-phase reflux on the tray, enabling thorough contact between the gas and liquid phases to achieve heat and mass transfer； It is to remove the excess heat entering the tower, maintaining thermal balance throughout the tower to facilitate control of product quality.
It provides liquid-phase reflux on the tray, enabling thorough contact between the gas and liquid phases to achieve heat and mass transfer； It is to remove the excess heat entering the tower, maintaining thermal balance throughout the tower to facilitate control of product quality. The top of the tower temperature is controlled by the reflux rate at the tower top; when the temperature is high, the product becomes heavier, so it is necessary to increase the reflux rate to control the quality. However, the backflow rate should not be too high to prevent the upper trays and the top of the tower from being overloaded.
The function of the fractionator reflux is to ensure thorough contact between the vapor and liquid phases inside the fractionator, enabling multiple instances of vaporization and condensation in order to achieve optimal mass transfer. At the same time, the reflux carries away any excess heat from within the tower, helping to maintain thermal balance throughout the entire tower