The regeneration slide valve is a key piece of equipment that controls the ratio of catalyst to oil and reaction temperature in FCC units (FCCUs).
The regeneration slide valve is a key piece of equipment that controls the ratio of catalyst to oil and reaction temperature in FCC units (FCCUs). Unplanned shutdown caused by slide valve stem fracture is a challenging problem that limits the operational period of FCCUs.
In this article, the reaction–regeneration system in a commercial, 1-MMtpy FCCU was studied to determine the influence of a regeneration slide valve fracture on the key parameters in the regenerated and spent catalyst routes. Double-valve control technology was introduced to manage the slide valve stem fracture without requiring a shutdown. Meanwhile, the axial pressure distribution in the regeneration standpipe and the var
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