Re-refining oil level
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Why is it said that the change in the level of the recycled oil in the FCC unit is the indicator of the reaction depth?
This is the standard for evaluating a competent catalytic operator; the proper adjustment of reaction temperature, catalyst activity, and feed rate ultimately manifests itself in the level of the reprocessed oil.
In my opinion, when the feed rate remains constant, a greater degree of reaction results in more of the raw material turning into the gas phase and less turning into the liquid phase; as a result, the amount of oil that needs to be recycled is reduced. In terms of liquid level, this means that the level of the oil to be recycled decreases； Conversely, it increases
The reaction depth is high, resulting in a large proportion of gaseous components and a small proportion of liquid components in the product; therefore, less reprocessed oil is needed during distillation, and the level in the reprocessed oil tank remains low； Conversely, the more reprocessed oil there is, the higher the liquid level.