Upgrade FCC performance—Part 2
New ceramic feed distributor offers ultimate erosion protection
A new catalyst regenerator technology was developed to
improve Δcoke operations. Since improved equipment
technology and catalyst offerings have resulted in progressive
decreases in Δcoke, refiners have continued to
debottleneck unit constraints within the capacity of existing
major equipment. Usually with the constraint of not replacing
main vessels or large rotating equipment, i.e., main air
blowers (MABs), wet gas compressors (WGCs), regenerator shells,
reactor shells, stripper shells and catalyst circulation
standpipes. Maintaining this philosophy through several
technology upgrades can result in several operational and reliability concerns:
Excessive catalyst loading to regenerator
Cyclone erosion, fines
High catalyst circulation and catalyst flux
and stripper residence time
Hydraulic instability or
limitation in the catalyst standpipes
Excessive catalyst fines to the flue gas
matter (PM) emissions.
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