Catalytic slurry viscosity
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Recently, the viscosity of the slurry in the unit has increased to over 300, and the discharge rate is required to remain below 4%. Is there any solution?
Reduce the reaction depth, adjust the catalyst consumption per unit, and examine the properties of the crude oil. Increase the flow rate of reprocessed oil returning to the tower, and raise the dosage of the slurry scale inhibitor.
What is the unit for over 300? At what temperature was it measured? What is the density of the slurry? What was said on the 4th floor is correct. First, control the properties of the crude oil used – for example, by reducing the ratio of slag mixed in and decreasing the amount of slurry and reprocessed oil used. Second, lower the temperature at the bottom of the distillation tower; it should generally not exceed 355 degrees. Third, reduce the degree of reaction. Fourth, there are unconventional methods involving changes to the process: the slurry is drawn from the bottom of the tower and sent directly to a separate cooler for cooling before being discharged. The slurry that returns to the tower is mixed with diesel or medium-grade oil before being fed into heat exchangers such as steam generators, in order to reduce its viscosity and prevent scaling and coking in the heat exchanger tubes.