Catalytic reaction section, some issues with the unit
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This post was last edited by h*ng on 2017-11-15 at 14:31. What are the minimum requirements that must be met for a coaxial catalytic cracking unit in an emergency situation? Or what are the key parameters or control points that need to be monitored? Thank you so much!
Original poster, are you starting up a new catalytic system? Is it a new employee starting work?
Study*study*. . . . . . . . .
This post was last edited by Refiner on 2017-11-15 at 21:17. The operation for reaction regeneration involves blocking the middle part and controlling the ends – by cutting off the connection between the regenerator and the settler, using a flare valve to control the pressure in the settler, and employing a double-acting slide valve to control the pressure in the regenerator. This is done to protect the unit; if it needs to be shut down, then it should be shut down. At worst, it can be restarted, but hesitation in taking action to shut it down down could lead to damage to the unit, which wouldn’t be something that can be repaired in a short time. It’s sufficient to maintain stability in distillation, and to properly control the pressure and level of the refined gas – just ensure that there is no interaction between them. I hope this helps you
Does the fire relief valve control the reaction pressure? :)
Sorry, I made a mistake – the flare valve is used to control the pressure in the settler. It’s been corrected now
It is recommended to read the Q&A on catalytic cracking technology and the principles for handling reactor and regenerator accidents
It depends on the type of accident; the main consideration is whether to continue with sulfurization in the three reactors at the municipal level or to use the bed-sealing method. In the former case, it’s sufficient to keep the pressure in the settler below the regeneration pressure, reduce the circulation rate, and reorganize the feeding process. The latter is mainly to ensure that the pressure during the settling period remains 12 KPA above the pressure in the regenerator, thereby enabling new sulfurization to take place. The engine unit must be protected; it’s very delicate
In the event of an accident in a coaxial catalytic unit, it is essential to ensure that the pressure in the settler must not be higher than the pressure in the regenerator