Processing capacity of the distillation tower
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How does the processing capacity change when the pressure of the distillation tower is increased?
Generally, the processing capacity increases due to the reduction in gas volume.
{:3_50:} The impact of such pressure changes on the processing capacity depends on the reference point used; generally, there is a turning point in the relationship between the processing capacity of a distillation tower and its pressure. Within a certain pressure range, the processing capacity increases, but once a certain value is reached, it starts to decrease. At the same time, factors such as energy consumption also need to be taken into account in order to increase production capacity while reducing energy use.
Because if the pressure is too high, your relative volatility decreases, and it becomes difficult for the existing tower to ensure that the product meets quality standards; therefore, production capacity must be sacrificed in order to improve product quality
To what extent does increasing or decreasing the cold reflux at the top of the atmospheric pressure column affect the quality of the products from the lower side streams?
I would like to ask: to what extent does increasing or decreasing the cold reflux at the top of the atmospheric pressure tower affect the quality of the products from the lower side streams?
Increase pressure? Changing the operating conditions has a significant impact; the product quality may be affected as well
The distillation column can be divided into two columns; the overhead reflux serves to wash away the heavy components in the rectification section. Moving downward from the feed inlet, the feed can be considered as a form of reflux that helps to wash away the heavy components in the stripping section. By changing the cold reflux, you are altering the reflux ratio. If the amount of reflux is reduced, the quality of the product obtained from the bottom of the tower will definitely improve, but the quantity of product obtained will be less. Conversely, the greater the reflux, the more product will be obtained from the bottom; once a certain amount is reached, the lighter components will end up in the product coming from the bottom of the tower, resulting in a decrease in its quality.