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The Fluid Catalytic Cracker (FCC)
was a UOP unit constructed in 1947.
In 1987, it was completely revamped,
debottlenecked to increase the capacity
and a Kellogg riser was installed.
Because of these extensive upgrading
the capacity of the unit was increased
to 35,000 bpd. Although built in
1947, the extensive upgrades and
capacity increases have made this
unit competitive with current technology.
The FCCU was used to upgrade gas
oil to olefin feed stock for alkylation,
high octane gasoline and cycle
oil for fuel oil blending. The
FCCU is a fluid type.
This side-by-side Kellogg design
unit has dual short contact time
(two seconds) folded risers. Both
the reactor and the regenerator
have six two stage cyclones. The
regenerator operates in a full
CO burn mode. A CO boiler produces
125,000 pounds per hour of 600
psig steam from the regenerator
flue gas heat. The unit is also
equipped with a state of-the-art
electrostatic precipitator to
recover catalyst fines. The fractionator
makes an overhead gasoline/wet
gas stream, a LCCO side cut stream,
and a decanted oil bottoms stream.
Further fractionation and recovery
are done on the overhead stream
in the two stage absorption, one
stage stripping section of the
gas recovery section which is
part of the sale.
The unit ran only four years after
the last turnaround and was mothballed
in 1992. Extensive documents on
construction, maintenance, inspections
and upgrades are available for
review.
The WGRU ran in conjunction with
the FCCU. The unit had a major
upgrade in 1987 when a new Dresser-Clark
model 3MB centrifugal compressor
was added. This compressor has
since been removed and is being
used in other part of the refinery.
However, JAS can provide you a
similar compressor for additional
cost.
In 1987, new suction and interstage
drums, intercooler and aftercooler
were added. The unit was shut
down in 1992.
Recent inspection of the units
indicated that the all the vessels
are in good mechanical condition.
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