Catalyst shutdown issue
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Why does the catalyst in the reactor end up in the distillation tower?
The centrifuge does not provide good separation, or there are significant pressure changes.
The first is the centrifuge issue； The second reason is that after the feed is cut, excessive steam is used to drive off the oil and gas, resulting in thermal degradation of the catalyst and an increase in fine powder.
The reaction pressure fluctuates significantly; the centrifugal separation effect in the settler is poor, and the catalyst enters the gas collection chamber and then reaches the bottom of the distillation tower via the oil-gas line – a very dangerous operating condition.