In-depth study of atmospheric distillation
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Explain the principles behind cold reflux and top circulation reflux in atmospheric pressure columns; which one is better to deactivate?
The last edit to this post was made by ai444099439 on 2020-6-8 at 11:20. The function of the top circulation is to extract and utilize the excess heat within the tower, thereby serving as a control method to regulate the temperature at the top of the tower； Cold reflux is used to ensure the precision of the overhead distillate (overhead reflux is necessary for distillation operations) ； From a control perspective, the cold reflux should not be stopped, as it is a major source of liquid-phase reflux within the tower; whereas the top circulation can be stopped if the load in the tower is not very high!