The impact of reaction depth on the product
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After the reaction depth is increased, how should the distillation tower be adjusted to ensure that 95% of the diesel meets the specifications and the dry point of the crude vapor is within acceptable limits?
A greater reaction depth will increase the dry point of gasoline; therefore, the temperature at the top of the distillation column should be raised. This leads to an increase in gasoline yield. When it comes to cooling and reflux, attention should be paid to keeping the temperature at which diesel is extracted at an appropriate level, in order to prevent an increase in diesel production
Increase the tower top reflux and top circulation reflux, and appropriately lower the temperature at the diesel distillate outlet.
As the reaction depth increases, the degree of cracking also increases; the gasoline yield first rises and then falls, and a similar pattern is observed for the diesel yield. Therefore, adjustments must still be made by modifying the heat removal loads in the extraction and middle sections, based on the actual quality of the products.