The role of backflow
Thread Content
The function of the liquid drawn back into the distillation column
Mid-stage extraction in distillation is used to remove heat from the tower； In fractional distillation, the relatively low-temperature material from the middle section is returned to the lower part of the tower to release heat; this provides reflux within the tower, while simultaneously enabling the light components at the bottom of the tower to be distilled and rise upward, and the heavy components to be concentrated and flow downward, through a process of mass and heat transfer ；
I’m sorry, what I wanted to ask is about the function of the downward returning tower
Going back down the tower is nothing but backflow – what other function could it have?
Remove the excess heat from the middle section of the tower to reduce the load at the top of the tower.
Liquid reflux is provided to the lower trays, and gas-liquid contact enables distillation