Corrosion prevention measures for vacuum distillation towers
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This post was last edited by yuchenchf on 2011-9-16 13:46. Hello, friends: In the current design. Vacuum distillation is commonly used for the distillation of coal tar or heavy oil. Some towers are severely corroded; when the tower walls are corroded, air can enter and cause the light oil vapor to catch fire. It causes a lot of trouble for the departments using it; what measures should be taken in such designs to ensure greater safety? Thank you. This post was last edited by fushan on 2007-1-18 at 12:42.]
What is your operating environment, temperature and vacuum level? Is the cause of corrosion hydrogen sulfide? It wasn’t explained clearly. Generally, in such pressure reduction towers, composite sheets are used in the areas prone to corrosion at high temperatures; the inner layer is 0Cr13, while the outer layer is 20R, depending on the operating environment.
What I mean is the feed inlet of the second-stage tar evaporator. The guard plates and tower body are made of 20R material, and the medium is tar without hydrogen sulfide.