The diesel extraction in the fractionation tower has upper and lower extraction outlets, and the middle-grade oil also has corresponding upper and lower return outlets.
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This post was last edited by Jubao Pen Yi on 2019-1-31 at 23:57. The diesel extraction from the distillation tower has upper and lower extraction ports, and the middle-grade oil also has corresponding upper and lower return ports. How can diesel extraction and backflow to Stage 1 be adjusted in production to achieve more optimized conditions?
Personally, I think it’s better to adjust according to the needs. It returns to a medium-low level, and the light fuel is drawn off; the adjustment is very precise. Since the boiling ranges of medium fuel and light fuel are similar, only one tray is used for separation, which requires high skill in operation. If it is exported as light diesel, the composition of the light diesel will be lighter. In terms of operation, it is best to control the quality of light fuel wood using a single variable
Generally, when using mid-range upward pumping, diesel is used for upward extraction; when using mid-to-low range pumping, diesel is used for downward extraction. Diesel used for upward extraction has a lighter composition than that used for downward extraction, and its specific gravity is relatively lower compared to that of 95% grade diesel. The choice can be made freely depending on the quality requirements of the product
Is it possible to extract from the diesel inlet and reverse the tower in the middle section? Is it okay to set both the upper and lower diesel extraction valves at 1/2, and to operate the mid-section for returning fluid to the tower?