Let’s discuss backflow at the bottom of atmospheric pressure columns
Thread Content
How does the temperature change from the bottom of the tower to the feed inlet?
The temperature from the bottom of the tower to the feed inlet increases gradually, due to the effect of the stripping steam at the tower bottom, which causes some of the lighter components in the heavy oil at the bottom of the tower to vaporize.
When the heat load at the bottom of the tower is high, a bottom-loop recirculation can be established to make full use of the heat and control the bottom temperature. Under the action of vapor reflux (vapor injection at the bottom of the tower), the temperature in the stripping section decreases gradually from top to bottom.