Objective The aim is to clarify the corrosion influencing factors of the desulfurization system in natural gas purification plants, and form a suitable corrosion control technology for desulfurization system.
Method By conducting operational condition analysis and corrosion evaluation tests, the corrosion status, influencing factors, and control measures of the desulfurization system were analyzed.
Result The areas with severe corrosion in the desulfurization system were mainly located in high-temperature areas. Glycine and oxalate ions had a significant influence on the corrosion performance of the solution; the corrosion rate was up to 0.558 4 mm/a. When the temperature was between 110–150 ℃, the corrosion rate was doubled. The corrosion problem in the natural gas purification plant could be effectively controlled through parameters control, structural optimization and material preference.
Conclusion The corrosion environment of the desulfurization system in natural gas purification plants is harsh, and the corrosion mechanism is complex. Based on the analysis of corrosion effects, targeted corrosion control measures are formed, which can control the corrosion rate below 0.125 mm/a and ensure the safe and stable operation of natural gas purification plants.
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