Pressure distribution in a vacuum distillation column?
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There are several vacuum distillation columns in the workshop. The vacuum drawn from the top of the column should, in theory, decrease from top to bottom. Why then does the negative pressure in some columns decrease gradually, while in others it increases? What factors determine the level of negative pressure at the top, in the middle, and at the bottom of a vacuum distillation column?
It seems to be related to the amount of material in the tower and the volume of processing. Generally, a higher pressure or vacuum level at the top of the tower is better :)
The vacuum level at the top of the tower is mainly related to the vacuum pump; it is also likely related to the amount of material fed in. As for the bottom of the tower, it depends on the quantity of material present there. For example, if the tower is overloaded with material, the vacuum level at its bottom will keep dropping. That’s basically how it works for us