Catalytic fractionation tower

It is mainly the intermediate temperature; factors that have an impact include: top temperature, top circulation volume, intermediate circulation volume, stripping steam volume, and diesel distillation cut point. There are many methods for control; the appropriate adjustment method is chosen depending on the operating conditions at that time. There are also some effects on the reaction.

Reply to 2# 103388716: One more thing – the return of highly absorbent oil to the tower also has an impact

Our company primarily uses the distillation temperature of light diesel to carry out control; there are many factors that influence this, such as the circulation volume, temperature, top temperature of the tower, the amount of material processed in the reaction, the properties of the feed oil, and the degree of reaction, among others.

(1) The temperature at the light diesel extraction port of the distillation tower rises, and the freezing point increases； (2) An increase in the circulation volume in Unit 1 or a decrease in the temperature returning to the tower results in a lower freezing point ； (3) The raw materials become lighter, the reaction depth increases, and the freezing point decreases ； (4) Changes in the heat balance and material balance in the upper part of the distillation tower result in a decrease in the amount of gasoline extracted, an increase in the amount of diesel extracted, and a decrease in the freezing point ； (5) The liquid level in the light diesel stripping tower is full; light diesel cannot be drawn out, and the freezing point of light diesel decreases ； (6) An increase in the amount of lightly contaminated oil reused, or a decrease in temperature, leads to a lower freezing point ； (7) An increase in the flow rate of the reabsorption oil at the 27th stage of the reflux distillation column or a decrease in temperature leads to a lower freezing point.