Nozzle pressure issue
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Given a constant amount of vapor to be atomized, does the oil pressure before the feed nozzle in the riser have a significant impact on the atomization effect?
It has an impact, which depends on the model and size of the nozzle.
There is definitely an impact; high pressure results in better atomization
Of course it has an impact; high pressure leads to better atomization, ensuring thorough contact between the material and the catalyst, resulting in an ideal reaction. But it cannot be too high either, as contact between the material and the catalyst can lead to peeling, which is not favorable for the reaction.
Of course it has an impact; it’s not good if it’s too high or too low – it needs to be maintained at an appropriate pressure level
This is related to the structure of the nozzle. For target-type and centrifugal nozzles, an increase in oil pressure leads to an improved atomization effect. However, in the case of throat-type nozzles and uniform two-phase flow nozzles, an increase in oil pressure does not result in a significant improvement in the atomization effect.
The steam pressure entering the reactor is usually constant, as is the pressure of the feed material entering the lift pipe. During design, the nozzle type determines the pressure drop across the nozzle; a higher pressure before the nozzle implies a greater pressure drop, which is theoretically favorable for atomization and beneficial for the reaction. However, an excessively high pressure drop increases the load on the distillation process. Under normal circumstances, do not change the nozzle pressure.
What 7# said makes sense; there is definitely a certain voltage drop, and it’s not good if it’s too high or too low – it needs to fluctuate within a reasonable range. .