In the atmospheric and vacuum distillation unit, the tube bundle of the overhead condenser is severely corroded
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The image below shows the tube bundle of the reduced-pressure and atmospheric-pressure unit in petrochemical processing, specifically the top-reduction pre-condenser. Model: FLB1200-395-16-4, Material: 10# steel. This tube bundle has been in operation for nearly two years. Operating conditions: Shell side: oil, vapor, and water vapor, temperature 55°C, pressure negative. Process: Medium, deep well water, temperature 23°C, pressure 0.2 MPa. During maintenance, when the condenser was opened, it was found that the surface of the heat exchange tubes on the oil, vapor, and steam side was severely corroded.
The manifestations of corrosion vary; in some heat exchange tubes, the corrosion is relatively uniform, while in others there are numerous small pits. This indicates whether there is a problem with the material quality.