It’s still the reflux issue; I’d like to ask everyone for advice
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In catalytic cracking, a mid-stage reflux in the fractionation tower is drawn from the 21st stage, cooled to 200 degrees, and returned to the 18th stage. In the subsequent absorption towers, an intermediate reflux is drawn from the 8th stage and cooled to 38 degrees. Returning to the 9th floor of the tower. I want to ask, are we going up the tower or down? Based on what? What would be the consequences if it goes back the other way? I’d appreciate it if the experts could help answer this: '(
Fractionation and absorption are two different unit operations
What you’re referring to in the absorption tower isn’t called reflux; it simply serves to control the temperature
No, dear. The book says that both are mid-stage reflux. I'm very confused
Oh, I see now. You’re right; the absorption process is an exothermic reaction, and as absorption proceeds the temperature rises. A lower temperature is conducive to absorption, which is why the absorption tower is equipped with mid-stage reflux to remove the heat released, thereby ensuring effective absorption. Find relevant answers on Baidu. .
One is to control the temperature at the upper part of the tower, and the other is to control the temperature at the lower part of the tower.
The manufacturing processes of the two are different; it’s a fundamental difference! Although they are all backflow!