Catalytic cracking
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Why does the liquid level at the bottom of the fractionation tower increase as the depth of catalytic cracking reaction increases? Doesn’t an increase in reaction depth lead to an increase in the amount of dry gas and coke?
The liquid level in the fractionation tower is also related to the discharge of slurry, the bottom temperature of the tower, the L-shaped baffles, and the properties of the feedstock, among other factors
Yes, when the amount of slurry spilled outside increases, the liquid level drops, which also helps to reduce the solid content； If the temperature of the diagonal baffle is too high, the liquid level will drop; it should not be too high, otherwise it will increase the load on the upper part ； The high level of the crude oil level will increase ； A higher temperature at the bottom of the tower results in more volatile vapor, which lowers the liquid level; however, this temperature should not be too high, otherwise the aromatics will condense and form coke ； I wonder how an increase in reaction depth can explain the rise in the liquid level at the bottom of the fractionation tower? There are some things I just can’t figure out! Thank you, thank you
The increase in the liquid level at the bottom of the distillation tower is probably due to high oil and gas temperatures and a large circulation volume of the slurry.
Thank you. I read in a book that an increase in reaction depth also leads to an increase in liquid level, and I would like to know how this can be explained