Abstract: At present, the atmospheric and vacuum distillation unit of a petrochemical company mainly processes pipeline transportation of Kazakhstan crude oil, Karamay Mahu crude oil and South Xinjiang Yaha crude oil. The processing route is a fuel-chemical type unit. The unit aims to optimize the side line products, continue to promote production optimization, improve the properties of naphtha as afeedstock for steam cracking to produce ethylene. The device has been implementing pressure reduction and deep extraction for a long time to reduce the yield of vacuum residue oil. Through process optimization and adjustment, fuel gas consumption has been reduced.All three measures have contributed to enhancing the overall operational efficiency of the company.

Key words: atmospheric and vacuum distillation unit, naphtha, alkane, process optimization, deep cut vacuum distillation