Catalyst regeneration: bridging of slanted tube catalysts
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Catalyst bridging in the regenerative inclined tube catalyst holder: Since the unit was equipped with a catalyst cooler (the catalyst passes through this cooler after coming out of the regenerator, and then enters the lift pipe via the regenerative slide valve), periodic bridging of the catalyst within the regenerative inclined tube has occurred. Please help analyze the reasons for this
The regeneration effect is poor; after cooling, the temperature drops, and heat accumulates in the dead zone. Over time, this accumulation leads to bridge formation. I’m guessing
Was the overflow tank modified when adding the cooler? It is suspected that the issue is caused by insufficient thrust from the two actuators or a clogged overflow channel
It seems that few companies use this technology effectively; it was initially used at JJ Petrochemicals, where the catalysts basically remained inside without being of much use!
Could you draw a rough sketch so that everyone can have an understanding, which will help with the analysis?
http://bbs.hcbbs.com/thread-1379992-1-1.html There is relevant information there!
The regenerator catalyst cooling technology was installed on the unit five years ago, and it has been working well ever since. It involves adding a heat exchanger to the regeneration inclined tubes; this heat exchanger is equipped with a vertical steam generator that produces superheated steam. As a result, the catalyst circulation rate increased from 6.8 W/W to 7 W/W, which shows that this technology is indeed effective!