Discussion on causes of excessive nitrogen content in wax oil hydrogenation heavy naphtha
On October 2,2022,the nitrogen content of heavy naphtha in a wax hydrogenation unit exceeded the standard,which affected the normal operation of the downstream reforming unit.After multiple investigations and laboratory analysis,it was finally determined that there was aniline in the striping purified water of high-pressure water injection,and the organic nitrogen in it was brought into the fractation system and dissolved into heavy naphtha,resulting in the nitrogen content of heavy naphtha exceeding the standard.By reducing the amount of striping water,the nitrogen content of heavy naphtha can be guaranteed.
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