Those that can distill, take a look

A low gas phase load may be due to leakage in the tower, with light components leaking to the bottom of the tower and vaporizing suddenly, which causes the tower pressure to rise.

I’m not quite sure what you mean

The tower in our plant is quite strange: the higher the content of heavy components at the top of the tower, the lower the tower pressure becomes. In other words, the greater the reboiling volume and the smaller the reflux volume, the lower the tower pressure gets!

Personally, I think it’s normal that you don’t understand fractional distillation. 1. An increase in the content of heavy components at the tower top indicates an increase in the amount of product extracted from the tower; with unchanged energy consumption, the reflux flow rate decreases. 2. An increase in the content of heavy components at the tower top indicates a decrease in the light components there, as well as a reduction in the non-condensable gases that contribute to the tower pressure. 3. An increase in the overhead components leads to rises in both the top and bottom temperatures of the tower, creating the illusion that the reboiling capacity needs to be increased. Adjustment strategy: Reduce the amount of product taken from the top of the tower, increase the reflux rate, and lower the content of heavy components at the top of the tower.

I was wondering if you have ever encountered a situation where the lower the reflux temperature, the more likely the tower top product is to be substandard

The reflux temperature is controlled by the temperature after the top condenser; a low reflux temperature results in lower pressure at the tower top, which causes some of the heavier components to rise. Design requirements generally do not stipulate that the reflux temperature be too low. Is the reflux ratio also normal? He is related to the quality of your distillation results