I need help with a question regarding distillation control.
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There is currently a high-vacuum distillation unit, a continuous column with a reflux ratio of around 20, and a product collection rate of 30 L/h. It is planned to use reflux ratio control; is it better to control the reflux or the product collection rate? Additionally, this tower uses gravity-driven backflow extraction (that is, it relies entirely on the force of the fluid flow to overcome the negative pressure inside the tower for extraction at the top; there is no pressure balance mechanism in the tank). Are there any specific things that need to be taken into consideration in such a operating condition? Does anyone have any relevant information? I’d appreciate some advice.)
Personally, I think it’s better to control the liquid level in the reflux tank