Why does a distillation tower need reflux?
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Why is reflux necessary in the operation of a distillation tower?
If there is no reflux, doesn’t that mean flash evaporation occurs? Reflux provides a liquid phase that returns to the distillation section, thereby removing excess heat
To further improve the purity of the distillate.
Reflux is used to increase the concentration of light components in the liquid phase and to improve the purity of the light-component product. The higher the concentration of the light components in the liquid phase, the higher their partial pressure and purity in the gas phase.
No distillation without reflux. The core is this.
The purpose of reflux is to create a liquid layer on each tray, thereby facilitating vaporization on the trays and the exchange of substances between the vapor and the liquid.
Repetitive liquid-gas mass transfer exchanges yield a purer product, a process known as distillation.
Take a look at the principles of chemical engineering, distillation units, in more detail
It provides cold reflux on the tray to remove excess heat from within the tower, thereby maintaining thermal balance in it； Cold fluid is supplied to the tray, where the gas and liquid phases come into contact in opposite directions; the heavier components in the rising gas condense, while the lighter components in the descending liquid absorb heat and vaporize. This repeated process of condensation and vaporization further improves the precision of product separation
It is recommended that the original poster carefully study the principles of chemical engineering