During normal operation, is it required that the top pressure of the regenerator be greater than or less than the top pressure of the settler?
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During normal operation of catalytic cracking, is it required that the pressure at the top of the regenerator be higher or lower than the pressure at the top of the settler?
During normal catalytic cracking operation, it is required that the pressure at the top of the regenerator be higher than the pressure at the top of the settler.
Of course, the pressure in the regenerator is higher than that in the settler; only in this way can the inventory in the stripping section be maintained. Otherwise, both units could become under vacuum and even explode
In the coaxial type, the regeneration pressure is higher than the reaction pressure. But in the parallel type with the same height, if a double-acting spool valve is used to control the pressure difference between the two units, it’s possible that the reaction pressure becomes higher than the regeneration pressure
I know that in the coaxial riser type, the regenerator is definitely larger than the settler; if it’s reversed, fluidization won’t occur and an explosion could happen
The pressure in the regenerator must be higher than that in the settler, and a certain pressure difference must also be maintained; otherwise, backflow of oil and gas could lead to an explosion
The friend on the fourth floor is right; it depends on the structure of the catalytic cracking unit you are operating – whether it’s coaxial, arranged side by side at different heights, or some other design.