Corrosion of catalytic devices
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Corrosion of the catalytic device, types of corrosion that occur, and locations. Let’s discuss whether there is naphthenic acid corrosion
Settler: High-temperature sulfur corrosion； Sliding valve, regenerator internals, regenerator outlet pipeline: cracking due to polysulfuric acid ； Waste heat boiler: erosion, condensate corrosion, stress cracking ； Bottom of distillation tower: high-temperature sulfur corrosion ； Top of distillation tower: Ammonium chloride corrosion, low-temperature hydrogen sulfide corrosion ； Stirring tower: high-temperature sulfur corrosion, ammonium chloride corrosion ； Compressor inlet pipeline: wet hydrogen sulfide corrosion, ammonium chloride corrosion ； Stability: Wet hydrogen sulfide injury ； Naphthenic acid is affected by temperature as follows: at 400°C, petroleum acid decomposes and corrosion decreases. Therefore, it is believed that naphthenic acid decomposes, and there is no corrosion caused by naphthenic acid under catalytic conditions.