With all other operating conditions of the stabilizer tower remaining unchanged, will lowering the bottom temperature increase or decrease the pressure at the top of the tower? Why?
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With all other operating conditions of the stabilizer tower remaining unchanged, will lowering the bottom temperature increase or decrease the pressure at the top of the tower? Why?
My theoretical level isn’t very high, but for problems like this, I often approach them by considering the extreme ends. “With all other operating conditions of the stabilizer tower remaining unchanged, will lowering the bottom temperature increase or decrease the pressure at the top of the tower? “——These types of problems are quite simple: the condition for an extreme situation is that no heating is applied at the bottom of the tower, so how can the pressure at the top of the tower be increased?
You can lower the sensitivity board temperature by 1 degree Celsius, and then answer this question after seeing the results.
What the questioner is referring to is not that all other conditions remain unchanged, but rather that all other operating conditions stay the same. It depends on whether the pressure in the stabilizer column is under automatic control; if it is, then the column pressure will remain constant. If it isn’t under automatic control, I believe the column pressure will decrease.
The tower top pressure is not automatically controlled. You can lower the sensitivity board temperature by 1 degree Celsius, and then answer this question after seeing the results.
As the heat source at the bottom of the tower decreases, the bottom temperature drops, and the evaporation temperature falls as well; ultimately, the pressure decreases. Software simulations involve static calculations that are based on bubble point or dew point calculations determined by the separation requirements.
Since you already know the result, it’s time to test everyone’s theoretical knowledge! So please explain to everyone what happens when the sensitivity of the tray is reduced by 1°C?
Extreme analysis helps to eliminate other influencing factors, allowing for a more pure analysis of the problem – which is not a bad thing!
This question is left for the experts to explain. I’m just posting a discussion thread; if you want to pursue the truth, you can give it a try in practice. Please do not use the knowledge points from books as answers.
May I ask if what I did counts as using the knowledge points from the book to answer the questions? I thought you knew the answer, that’s why I said those things... So you don’t know either? Then why did you say that? Since you are in pursuit of truth, I suggest that you put it into practice on your own, rather than asking others to apply theory to reality – this way you will gain a deeper understanding yourself!
In single-variable analysis, simply reducing the bottom temperature or decreasing the heat source disrupts the vapor-liquid equilibrium, requiring the establishment of a new equilibrium; during this process, pressure first decreases and then increases