Practice **questions on March 10, 2017; replies will earn 2–6 points (** no scoring after it is displayed, thank you for your replies)
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Multiple-choice question: During normal production, if black oil appears during the initial ejection, one should ( B,C ). A. Increase the amount of the initial ejection device B. Shut down the initial side line C. Transfer the product to a tank designated for unqualified products D. Stop the operation for handling
During normal production, when black oil appears during the initial ejection, it is necessary to (B)
The appearance of black oil in the initial distillate indicates that the temperature of the crude oil entering the fractional distillation tower is too high, causing the heavier components to rise to the upper stages. First and foremost, it is necessary to route the gasoline from this stage to the unqualified product stream; additionally, could increasing the pressure in the fractional distillation tower be used to adjust the situation so that the product meets the required standards? New beginner seeking advice