Ethylene Industry ›› 2022, Vol. 34 ›› Issue (3): 49-53.

• ENERGY CONSERVATION AND CONSUMPTION REDUCTION • Previous Articles     Next Articles

Optimization Measures for Low-energy-consumption Startup and Shutdown of Ethylene Separation Unit

Wang Junbin,Luo Jiancheng, Dong Haiming, Zhang Zhifei, Liu Minzhuan   

  1. PetroChina Dushanzi Petrochemical Company, Dushanzi, Xinjiang, P.C.833699
  • Received:2021-08-11 Revised:2022-04-29 Online:2022-09-25 Published:2022-09-20

Abstract:

In recent years, with the strengthening of national regulation on environmental protection, enterprises pay more and more attention to the low emission of ethylene plant. During the startup and shutdown of ethylene plant, optimizing startup steps, shortening startup and shutdown time and reducing material loss during startup and shutdown while ensuring the safety of personnel, plant and equipment are the goals of ethylene plant, and over the years, various enterprises have accumulated rich experience. The ethylene cryogenic separation unit has the highest material loss during the startup and shutdown of ethylene plant. Based on the original optimization measures, the 220 kt/a ethylene separation unit of Dushanzi Petrochemical conducted new researches and analysis on the problems including low cooling speed and high material loss of the system. Through the implementation of targeted technical transformation measures, the startup time was greatly shortened and the material loss during startup and shutdown was reduced.

Key words: ethylene separation, startup and shutdown, material recovery, low emission