What causes bulging of the lining in a CO2-stripped urea synthesis tower?
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What causes bulging of the lining in a CO2-stripped urea synthesis tower? The bulging area extends from above the weld on the topmost tray to the surfacing area at the vault; there are multiple bulges in this region, and it can be ruled out that high leak detection pressure is the cause. What other factors could lead to such bulging? Please give your advice
Is it the same tower as the one with deformed trays mentioned in another post? If so, it indicates serious deficiencies in the process and equipment operation management of the entire urea plant; it is recommended to conduct a systematic analysis and corrective actions. As for the cause of the bulging on the lining, it may be due to excessively high steam temperature during leak detection, corrosion, or too rapid changes in temperature and pressure
Bubbling in the cladding weld layer – I’ve heard of this for the first time.
It’s between the surfacing layer and the first weld; you have a misunderstanding