Coaxial catalysis, reverse pressure difference problem.
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In coaxial catalysis, during normal operation the regeneration pressure is 30-50 KP higher than the settling pressure; why, however, during startup and shutdown is the settling pressure 5-10 KP higher than the regeneration pressure? Thank you so much!
Prevent main wind from entering the reactor and causing accidents
In terms of reaction and subsequent distillation stabilization, ferrous sulfite is generally present; air that gets mixed in can catch fire on its own, so it is necessary to ensure that the reaction pressure is higher than that during regeneration.
During the start-up and shutdown periods, the reactor is mainly filled with oil-gas and steam； At this point, the fractionation and stabilization systems have begun to receive oil and are in operation, containing a large amount of oil and gas ； The reaction pressure is slightly higher by a few thousand pascals; what enters the regenerator is merely a small amount of oil gas and steam ； Upon entering the regenerator, this substance burns at high temperatures ； On the contrary, if hot main air enters the reactor and then proceeds to distillation and stabilization, the consequences would be quite terrible, you know
It must be for safety reasons! Our experienced workers say it’s fine if a small amount of oil and gas enters the regenerator during startup or shutdown! At the worst, it can be burned! If air enters the settler, it could trigger a catastrophic explosion!
A large amount of oil and gas entering the regenerator could lead to a catastrophic explosion
If a large amount of oil and gas enters the regenerator, catastrophic accidents such as explosions could occur
Mainly because there is no catalyst used as a seal, the two vessels are connected. Therefore, it is required that the settlement pressure be higher than that of regeneration to prevent accidents.
Under normal conditions, it is to ensure the driving force of the catalyst; during shutdown, it is to prevent air leakage in the rear system!
Prevent air in the regenerator from entering the oil-gas space to avoid accidents