Can only one of the dual lift-column catalytic units be started when bringing the facility into operation?
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A certain set of dual riser catalytic units, with feed oil entering in the first section and recycled mixed C4； Two-stage feedstock, reprocessed oil, and slurry are mixed for feeding, to produce reprocessed light gasoline. Can only one lift pipe be operated at startup? Everyone is welcome to share their opinions.
Sure, unless you don’t put the second lift pipe into use! But be sure to take good protection!
Is it a TMP unit? Everyone is welcome to continue the discussion – does the crude oil also go to the second stage as well?
Yes, the raw materials go to the second stage :）
How to protect it? Steam it? :0
It is best to operate them simultaneously; when one set of lift tube units is shut down, the secondary lift tube (auxiliary lift tube or gasoline lift tube) is used, so that during maintenance it becomes possible to detect issues with the settler of the secondary lift tube (auxiliary lift tube or gasoline lift tube). The nature of the coke in this case is relatively loose, with condensed oil and gas components adhering to the catalyst.