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Admin WebsiteBegginer

Asked: March 26, 20252025-03-26T21:10:36+00:00 2025-03-26T21:10:36+00:00

What are the common problems in CDU operation and their solutions?

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Problem	Causes	Solutions
High salt content in crude after desalter	Low wash water injection, poor mixing	Increase wash water, optimize pH
High overhead temperature	Insufficient reflux, condenser fouling	Increase reflux, clean condenser
Bottom residue too viscous	High heater temperature, poor stripping	Optimize stripping steam, control furnace temp
Pressure drop across column increasing	Tray fouling, coking in the bottom section	Inspect trays, clean internals during turnaround
Poor separation between diesel & kerosene	Reflux ratio too low	Adjust reflux flow, optimize column temperatures

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