How to prevent corrosion and scaling on the surface of the heat tubes in the air preheater of a heating furnace
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The image below shows the corrosion on the surface of the heat pipes as well as the scaling and ash accumulation in the air preheater of a refinery heating furnace after more than a year of use. Corrosion and scaling reduce the service life of heat pipes and lower their heat transfer efficiency. What protective measures can be used to solve this problem?
It doesn’t seem to be corrosion; it seems to be due to poor air quality, plus no filters are installed at the air intake... As for moisture, the temperature of the air should rise after compression... Moisture is not likely to cause condensation at low temperatures
This post was last edited by Wang Wei2 on 2019-7-31 at 10:17. A filtering device is installed upstream; colleagues then determine whether corrosion is present based on the properties of the medium, temperature, and site conditions, and take appropriate measures accordingly.
Installing a non-woven fabric filter in front of the heater can help filter out some dust.