Corrosion of pipeline on top of hydrogen sulfide stripper and countermeasures
The main reason for the corrosion of pipeline at the top of hydrogen sulfide stripper was that the flow rate of horizontal section at the overhead pipeline decreased when material at the overhead was transferred to the horizontal section.The corrosion inhibitor injected at the top of the tower mainly fell on the middle and lower parts of the pipeline,causing a faster corrosion rate in the upper part of the horizontal section.Besides,the low temperature formed by factors such as hydrogen chloride,ammonium chloride salt crystallization,and insulation promoted the corrosion of the horizontal section.The corrosion rate of pipeline at the stripper overhead can be reduced through the use of inhibitor nozzles,water injection,good insulation,and optimization of oper-ating parameters.
万方数据
维普
