Hydrocarbon Processing - March 2022 - 43

Process Optimization
* Total annual direct filter cartridge
cost = total changeouts × cost
per changeout
* Filter disposal costs
* Operator hazard-related costs
* Cost of shipping and storing filters
* Other consumable costs per
changeout (e.g., fluid losses,
vessel seals)
* Rental equipment for
catalyst change.
Viewed as an integral part of a larger
process design, the selection of a feed filter
system at the design phase becomes
a more significant consideration. Feed
filter performance is crucial for the refiner.
A lack of performance can result in
millions of dollars in direct material and
labor costs, as well as unplanned production
losses.
Designing filters for value and improved
catalyst performance. A correctly
sized, efficient feed filter system
provides the most effective way to condition
the feedstock prior to reaching the
reactor. The feed filter should be located
as close to the reactor as economically
feasible to ensure that a minimal amount
of contaminants is selected between the
two. The location for temperature considerations
is important, as well. For
heavier feedstocks, an increase in the
temperature will
lower viscosity and
cause asphaltenes to go into the solution,
thus extending filter life. However, this
trade-off could result in a higher-cost design
for the filters. While the filters may
have a bypass line, this should only be
opened in rare or abnormal conditions.
Additional important design and installation
criteria include:
* Filter retention efficiencies
consistent with the
recommendations of the catalyst
manufacturer or process
licensor-usually 10 μm-20 μm
at 99%-99.98% efficiency,
depending on catalyst diameter
and reactor packing density
* Ergonomically designed
vessels that are duplexed
(2 × 100%) for ease of
changeout
* Vessel sizing to accommodate
upset conditions to avoid bypass
or rate reductions
* System sized on both flow and
No greater than 0.5 gpm/ft2
potential contaminant loading
flux
rate to maximize cartridge dirt
holding capacity (DHC)
Consideration of total suspended
solids and particle size
distribution
Consideration of ancillary
contaminants, such as
asphaltenes, as these can be
captured by the filter
* Media tested according to industry
standard ASTM F795-88 (1993),
including single-pass, initial
efficiencies to ensure consistency
and performance integrity
* Pressure drop based on actual
operating conditions
* Considerations for future
throughput potential
* Media, support layers, component,
and elastomer chemical and
thermal compatibility
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Wednesday, March 9, 2022 | 10 a.m. CST / 4 p.m. UTC
Boost Worker Productivity, Competency
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Manas Dutta
Global Product Manager
Honeywell Process Solutions
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Lee Nichols
Editor-in-Chief/Associate Publisher
Hydrocarbon Processing
The program is built around your people. Our consultative process is role-based and resultsdriven,
tailored to meet your specifi c objectives.
Register for Free:
HydrocarbonProcessing.com/Webcasts
Hydrocarbon Processing | MARCH 2022 43
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Hydrocarbon Processing - March 2022

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