Fractionator operation
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The distillation tower does not separate well; gasoline contains diesel, and diesel contains gasoline. How can this be adjusted?
Reduce mid-section reflux and increase top reflux.
Increase the operating pressure of the tower, raise the feed temperature and bottom temperature, and increase the reflux ratio
Stabilize two of temperature, pressure, and flow by adjusting one; for example, keep temperature and pressure constant and reduce or increase the return flow rate.
Agree with the person above! :victory::victory::victory:
It is worth mentioning the feed temperature and the bottom temperature of the tower; reduce the reflux at the middle section slightly, as there is some liquid flooding in that area, which undermines the separation efficiency. Try to maintain stable pressure at the top of the tower as well as a stable feed rate
I have only been working for a short time, so I lack both theory and experience. I would like to ask you: when the tower pressure and temperature in a distillation column need to remain constant, shouldn’t the composition of the product also remain unchanged? What is the reason why changing the backflow can adjust product quality?
You can take a look at the relevant knowledge on distillation. All distillation column principle animations http://bbs.hcbbs.com/thread-982305-1-1.html
Simply put, the operation of a distillation tower can be compared to rain and dust; the heavier the rain, the easier it is for the dust to be carried to the ground by the rain. Rain is understood as the liquid phase, while Yang Chen regards it as the gas phase. Also, what you mentioned about diesel being present in gasoline, and gasoline being present in diesel, is actually a phenomenon of back-mixing, which indicates that the operation of your tower is quite unstable. Therefore, the first step should be to ensure stable operation, followed by product analysis to determine whether it is diesel in gasoline or gasoline in diesel If diesel is present in the gasoline, it indicates that the \"yeangchen\" value is too high, causing the heavier components to evaporate. In such cases, it is possible to increase the top reflux or raise the pressure in the tower in order to reduce the amount of heavy components that end up in the gasoline; the same principle applies in reverse!