Delayed coking with external recycle.

摘要

A delayed coking process for a coker feedstock having a high propensity toward fouling is disclosed. The process includes feeding a coker feedstock (10) to the lower section of a coker fractionator (12), adding a recycle stream (18) derived from an external source to the coker fractionator bottoms prior to passing the bottoms to a furnace (14), passing the heated coker fractionator bottoms to a coking drum (16) and returning the overhead vapors from the coking drum to the coker fractionator (12).