Issues related to the design pressure of the tower
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I’m asking why the design pressure at the top of the tower is lower than that at the bottom – what is the basis for this design?
The bottom of the tower is the heating section, where the light components vaporize and rise toward the lower-pressure top of the tower. Also, with the liquid level so high, the liquid itself exerts pressure due to its own gravity!
For a tower, the highest pressure is at the bottom, and the lowest is at the top.
There is still a lot of gravitational force on the liquid phase at the bottom of the tower. . .
Well, inside the tower it’s all a gas phase; the higher the temperature, the greater the pressure