Usually, two distillation lines are set up in the primary line
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For the normal distillation, distillation lines are installed under the 14th and 16th tray levels respectively. Why are there two distillation lines for Chang Yi?
Two extraction lines are usually set up in the primary stage, which enhances the flexibility in the operation and output of the atmospheric pressure tower. The composition of the oil products from this stage can be adjusted according to the requirements of oil blending (the oil extracted at layer 14 is lighter in composition, while that extracted at layer 16 is heavier)
It’s about the diesel pour point in winter and summer; just emphasize that point