Will the shutdown of the hydrocracking reactor cause the feed pump to stop as well? What should be done?
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If the feed pump keeps running, can circulation be carried out? Will it contaminate the catalyst?
Stopping the pump will trigger an interlock that shuts down the furnace, but generally, shutting down the furnace does not trigger an interlock to stop the pump； Short-term accident handling involves long cycles and does not affect the catalyst.
Even for a short period of time, are you sure it’s okay to introduce cold material into the reactor?
What other disadvantages does cold feeding have besides having more debris?
The pump will not stop; cooling will continue via circulation. Remember the cycle: unhydrogenated feedstock must not be used, as it will poison the cracking catalyst.
The dosage can be reduced in a short period of time, but feeding must be stopped over a longer period. Monitor the temperatures of each bed layer in the reactor.