Solve! ! ! !
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The measures that must be taken when the liquid level in the side line tower is too low and this results in an interruption of the external discharge are ( ). A. Increase the top reflux. B. Raise the temperature at the top of the distillation tower. C. Lower the feed temperature to the distillation tower. D. Raise the feed temperature to the distillation tower. An answer is needed for this question; it seems like there’s something wrong with how this question was formulated ! !
Let me start by saying that the answer to this question is D. I think there’s something wrong with it! ! !
The measures that must be taken when the liquid level in the side line tower is too low and this results in an interruption of the external discharge are ( ). A. Increase top reflux
Reasons for the too low liquid level in the side tower: the oil product is too heavy, and too little feed enters the side tower. If the top reflux is increased, the liquid level in the reflux tank cannot be maintained; therefore, the temperature at the top of the distillation column should be raised to make the components entering the side column heavier, thereby establishing an appropriate liquid level and ensuring the necessary amount of reflux. At this point, the parietal return flow should decrease to ensure outward discharge. This is just my personal opinion for reference only; I am not aware of the actual situation