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[halkeshhulk]

Dear all,

I would like to understand Distillation Column Top Pressure and Pressure in Reflux drum for total condenser. (Debutanizer Column)

Q1. At the top tray where liquid and Vapor are leaving, the top pressure is maintained by the liquid mixture leaving the top tray through its equilibrium Vapor pressure or any impact of Vapor leaving the tray on the top column pressure?

Q2. Once the Vapor gets condensed and gets collected at the top, my reflux drum pressure is also found to be almost same? The pressure in the reflux drum again is due to the liquid mixture Equilibrium vapor pressure?

Q3. I would like to understand, apart from normal flow pressure loss, why normally distillation column top Vapor condensation doesn't bring down the pressure in reflux drum? How to understand it?

Q4. How to understand the pressure concept for any random tray in the column? If liquid Vapor pressure is what is causing pressure, bottom trays contain heavier and the equilibrium liquid vapor pressure should drop due to heaviers in the liquid mixture, but in reality pressure profile is like high at the bottom, from my understanding, it is high due to high temperature of the heavier mixture which has created sufficient equilibrium Vapor pressure more than the light liquid mixture Equilibrium vapor pressure at the top?

Kindly guide me. Love to understand the things properly instead of feeling or saying, that is how it is or it works.

Edited by halkeshhulk, Yesterday, 02:01 PM.