I have a question regarding catalytic cracking
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For those just starting to learn about *catalytic cracking units, especially the coaxial two-reactor type, what should be taken into consideration at the beginning of operation?
For coaxial catalytic cracking units, in my opinion the key lies in catalyst fluidization, adjusting the pressure difference between the two reactors, and regulating the amount of loose material in the feedstock riser. As for the feeding issue, as long as the temperature is well controlled, the feeding rate can be adjusted gradually to normal levels based on the pressure in the settler.
It’s the same as other forms of catalysis. I think the main points are: 1. The inventory and density in the stripping section must be accurate, otherwise the catalyst will end up in the distillation tower; 2. One must be well familiar with the usage methods of various special valves; 3. Accident plans need to be prepared in advance; 4. Various parameters should be adjusted according to actual conditions, as the targets set before starting up may not be suitable
2# fdfcc: For when operations just start, how can the pressure in these two devices be increased?
I was wondering if things get pretty stressful when work starts? Should a large-scale circulation be carried out using crude oil first? 3# Refiner
Don’t you have a plan to get started? Do you only think about what to do when it comes to the point? Of course, it must be very stressful the first time. But think more about it and remember more, and it will definitely be fine. If you can’t find a start-up plan, I can send you our setup.