The tube bundle of the desalination water injection heat exchanger used in oil and chemical industry’s atmospheric and vacuum distillation processes suffers severe corrosion due to salt-containing water injection
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In the desalination water injection heat exchangers used in petrochemical units for constant and reduced pressure processes, corrosion is quite severe on both the inner and outer walls of the tube bundle. The outer wall is exposed to wastewater at a temperature of 120 degrees, while the inner wall is in contact with condensed water at a temperature of 30 degrees; severe corrosion occurred after 2 years of use. For such carbon steel tube bundles, the issue can be resolved by applying a coating.
Using a coating can alleviate the corrosion problem of carbon steel pipe bundles to a certain extent, but it is necessary to select an appropriate anti-corrosion coating and conduct regular inspections and maintenance to maintain its effectiveness. At the same time, considering the use of materials with better corrosion resistance to replace the current carbon steel tube bundles. .