What is the extraction method for catalyzing the reflux in each section? What are everyone’s fractionation towers like?
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The extraction methods for each reflux in the catalytic fractionation tower include full extraction and partial extraction; everyone is welcome to share their opinions. Let’s talk about ours first: Top circulation – partial; Diesel upper part – partial; Diesel lower part – full; Full middle section – partial; Re-refined oil – partial; Oil slurry – full
This post was last edited and replied to by linweihua6 on 2011-5-15 at 15:43. 1# 328104062: Top circulation – partial extraction; diesel, upper and lower streams – partial distillation; stripper – full extraction. Middle-stage circulation – partial extraction; re-refining oil – partial distillation; stripper – full extraction. Oil slurry – full extraction. Partial extraction is better as it helps save investment
Reply to 2# linweihua6: Why not extract all of them when extracting? Although an investment was made, the diesel extraction rate is high
Reply to 4# 3FCCtaofeng: If all the reprocessed oil is withdrawn, how can reprocessed oil be used to balance the liquid level in the distillation tower? ? ? It should be partially drawn out, I guess
Reply to 5# 328104062: Isn’t there a reflux back to the distillation column?
Reply to 7# Scattered Skelets: If all the reprocessed oil is drawn out, how can reprocessed oil be used to balance the liquid level in the distillation tower? ? ? Pay close attention: it means pulling everything out, pulling down and then moving back up
Is the oil extraction from the re-refining unit and the return to the tower done on the same tray? If all the oil is extracted, can the liquid level at the bottom of the fractionation tower still be maintained?
Are trays with lift holes also divided into fully extracted and partially extracted types? Does one of the extractions from the distillation column fall under the category of semi-extraction?
Generally, diesel is fully extracted, while in other cases extraction is partial. There is still a difference between catalytic fractionation towers and coking fractionation towers