Is it advisable to significantly reduce production in case of sudden shutdown of the FCC compressor?

Once our turbine stops, the response team’s task is to cut off the feed, as it takes 20 minutes before we can restart the turbine; leaving the flare system active for too long is a waste

If the compressor can be restarted in a short time after shutting down, the flow rate can be reduced appropriately; if reducing the flow rate results in the VQS and the inlet velocity at the cyclone being below the minimum velocity required for proper operation, the steam flow rate can be increased slightly. If recovery is not possible over an extended period, the material must be cut off and the bed regenerated; once the regeneration temperature drops below 400 degrees, the catalyst must be removed and operations must be halted completely

For some hypothetical accidents, one needs to ask oneself several times why during the analysis process Question 1: Why is reducing the volume the first thing that comes to mind in an emergency? On this issue, there is generally a good consensus among everyone! Large-scale equipment is usually shut down temporarily, and a significant reduction in processing capacity is required, as the entire process equipment does not meet the necessary basic conditions. Moreover, such a reduction can minimize the risk of secondary accidents. Question 2: A significant reduction in flow rate will affect the pressure drop in the reactor cyclone, leading to material leakage. How should we deal with this? After a significant reduction in flow rate, the velocity of the oil and gas in the pipeline also decreases, which leads to changes in pressure drop. As a result, the cyclone cannot operate properly, thereby causing some leakage of fluid! What is the reason? If the gas velocity is too low, find a way to increase it in order to maintain a minimum linear velocity; this way, the cyclone can operate under relatively normal conditions, ensuring that there is minimal loss of material, or at least less loss! How can it be improved? The fastest way is for the operator to fully open the steam control valves of the relevant lift pipe systems, in other words, to increase the amount of steam as mentioned above, thereby ensuring the line speed! Question 3: If a large piece of equipment in the unit fails and causes a temporary shutdown, how should we handle it? The principle is that, unless there are issues with the unit’s hardware or irreparable logical problems, we should resolve the unit’s faults as quickly as possible so that it can resume feeding operations at the earliest possible time! Otherwise, arrange an emergency shutdown as soon as possible; the longer it is delayed, the worse it will be for everything!

Why does it take such a long time to start the air compressor? There’s no major issue with our device; it started working in 10 minutes.

Could large fluctuations in the centrifugal separation voltage drop cause malfunctions in the centrifuge? (Separator is clogged! ）