Separation issues in the distillation column of hydrogenation reforming units
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The dry point of the naphtha from this unit is 163, and the initial boiling point of diesel is 184. Why is the carbon-10 content in the naphtha still above 7%? What’s the reason for this? How to adjust?
The dry point of your gasoline is 163°C; it falls within the C4-C9 range. The initial boiling point of 130–140°C indicates that it is indeed gasoline. A 7% content of C10 at 163°C means that there is too little of this component. The amount of kerosene present also ends up in the diesel fraction, which is why the yield of diesel isn’t high. The reflux from the top of the tower can be increased to lower the temperature at the top, while the feed temperature at the bottom of the tower can be raised slightly. All the side streams for extracting diesel should be activated as well, which will increase the diesel output. However, I don’t know what the amount of diesel feed is; this could affect the quality of the diesel, so care must be taken
Make the reflux at the top of the tower more effective in separating gasoline from diesel
Pay attention to the diesel flash point, and reduce the heavy components in the naphtha. . .