Shutdown operation of the catalytic unit
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Before shutting down the catalytic cracking unit, the feed rate should be reduced in advance; to what extent should it be reduced before the feed is stopped? What determines this degree of reduction?
We emptied the raw material tank before stopping the feed.
Yes, generally the feed is stopped only after the raw oil tank has been emptied； The reduction in volume is limited to the lowest level that the device can tolerate.
It should be added that the minimum and maximum amounts that the device can handle are generally determined based on the device’s design, typically ranging from 60% to 110%. In actual operation, each individual device will find its own appropriate minimum amount depending on the raw materials it uses