The condenser tube bundles in the atmospheric and vacuum distillation units of the petrochemical industry are corroded by oil and gas; what anti-corrosion measures should be adopted?
Thread Content
The image below shows the tube bundle of the secondary vacuum condenser in an oil and petrochemical atmospheric and vacuum distillation unit. Operating conditions: Tubing: medium, circulating water; temperature 35°C, pressure 0.4 MPa. Shell side: Medium, oil and gas; temperature 100°C, pressure 1.3 MPa. The outer wall is severely corroded with a lot of rust.
To address the issue of corrosion caused by oil and gas in the tube bundles of petrochemical condensers, the following anti-corrosion measures can be taken: 1. Use corrosion-resistant materials: Select materials with high corrosion resistance such as stainless steel or nickel-based alloys to replace the existing tube bundle materials. 2. Surface coating: The tube bundle is subjected to surface treatment and coated with anti-corrosion coatings, such as epoxy resin coatings or polyethylene coatings, to prevent direct contact with the medium. 3. Cathodic protection: This technique uses electric current to slow down the corrosion process. 4. Regular cleaning and maintenance: Periodically remove rust and deposits from the inner and outer walls to prevent further corrosion. 5. Use corrosion inhibitors: Add corrosion inhibitors to the medium to reduce the corrosive effect of oil and gas on metals. .