关键词: 焦化装置, 加热炉, 结焦

Abstract: Two furnaces and four towers are used for 20- hour coking in the 2.9 Mt/a coking unit of certain refining and chemical Corp. Ltd.. The vacuum residue of atmospheric and vacuum distillation unit is used as the raw material. The average cleaning period of the heating furnace is 11 months. Since the normal operation after the overhaul in August, 2019, the coking speed of the heating furnace has been accelerated due to various impacts, which affects the long-term operation of the device. According to the production data of the atmospheric and vacuum distillation unit and the delayed coking unit of an oil refining and chemical company, this paper analyzes the causes of the furnace coking and proposes measures for improvement so as to extend the operating cycle of the furnace.

Key words: coking unit, heating furnace, coking