关键词: 裂解炉 ,  , 轻烃 ,  , 加氢裂化尾油 ,  , 长周期运行

Abstract: The raw materials of the 1,000 kt/a ethylene plant at PetroChina Dushanzi Petrochemical Company consist of naphtha (NAP), circulating ethane/propane, light hydrocarbons, LPG and hydrocracking tail oil (HVGO). Because of the diversity of cracking raw materials, the switching operation of cracking furnace was frequent. The light hydrocarbon regulating valve of light hydrocarbon furnace was often blocked, and leakage was found at the secondary steam injection of HVGO furnace. By optimizing the unit operation and eliminating and preventing the hidden dangers, the long-term operation of cracking furnace can be achieved.

Key words: cracking furnace, light hydrocarbon, hydrocracking tail oil, long-term operation