Severe coking of the tube bundle in the crude oil and residue heat exchangers of petroleum refining units

2025-04-16View Original

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This post was last edited by Wang Wei2 on 2025-4-16 08:56. The images below show the tube bundle of the heat exchanger used in the atmospheric and vacuum distillation units in the petrochemical industry, for handling crude oil and residue oil. Model: FB800-170-40-2, Material: 10#, Operating conditions: Shell side: slag removal, temperature 378°C, pressure 1.81 MPa. Piping: Medium, initial bottom oil, temperature 309°C, pressure 1.99 MPa. The slag reduction zone, being in a high-temperature area, is subject to corrosion caused by high temperatures and sulfur, as well as naphthenic acid corrosion. During operation, if there are fluctuations in the handling of the heat exchanger, slag accumulation in the shell side is likely to cause coking, which affects the heat exchange efficiency of the heat exchanger.

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Severe coking of the tube bundle in the crude oil and residue heat exchangers of petroleum refining units

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