Corrosion and scaling of water cooler tube bundles
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In petrochemical plants, water coolers (wastewater coolers) are often found to have a large amount of dirt and microbial sludge accumulated on the inner walls of their tube bundles once they are opened. It severely affects the heat exchange efficiency and the service life of the tube bundle. Operating conditions: 30–60 degrees, pressure of 0.8 MPa, medium is circulating water. Are there any good ways to prevent structural damage and corrosion?
Chemical cleaning methods can be used regularly to remove scale and microbial sludge from the pipe walls, while appropriate amounts of corrosion inhibitors and biocides are added to the circulating water to prevent corrosion and biological contamination. Optimizing water quality management by controlling the mineral content and pH level in the water can also help reduce problems related to scaling and corrosion. For long-term performance, it is recommended to regularly inspect and maintain the water treatment system. .
The most important aspects are water quality control and flow rate control. For water quality control criteria, reference can be made to GB50050-2017, the Design Code for Industrial Circulating Cooling Water, as well as other relevant standards. The main methods for corrosion prevention include the use of anti-corrosive coatings, usually SHY-99 coatings; reference should be made to SH∕T 3540-2018, the Technical Specifications for Anti-corrosive Coatings and Painting of Tubes in Steel Refrigeration and Heat Exchange Equipment. Anodes can also be used, and these are all common methods for corrosion prevention these days.
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