Closed-loop control can clamp down on crude unit corrosion
Automating the detection process and controlling applications in real time dramatically boosts performance
The refining industry has been dealing
with crude unit overhead corrosion since the early days of the
industry. Many refiners today understand that 90% of corrosion
damage occurs 10% of the time, when persistent and ongoing
overhead corrosion is prevalent. These small periods of
corrosion are related to unstable operations, the processing of
opportunity crudes or other interruptions in normal operations.
The industry has historically tried to control the corrosive
environment through the
application of best practices; by using specialty chemicals
including sodium hydroxide (caustic); by improving desalter
operations; and by upgraded metallurgy. The gap with this
approach is not the tools themselves but the application of
these tools. Todays industry best practices impact 90% of
stable operations but fail to address the 10% of time during
unstable operations when the lions share of corrosion
damage can occur.
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