Abstract:

The operation cycle of the heavy oil cracking furnace at SINOPEC Zhenhai Refining & Chemical Company has reached more than 120 days, but at the end of the operation, the fuel consumption increases, the output of ultra-high pressure steam decreases and the energy consumption increases under the same feeding quantity. The energy consumption required for coke burning of cracking furnace is calculated, the ratio of feed to fuel and the ratio of ultra-high pressure steam output to fuel consumption during the whole operation cycle are analyzed, and the average data every 10 days of the 50 days before operation and that of the 50 days after operation are compared. The results show that the objectives of planned decoking and lower total energy consumption of the ethylene plant can be achieved through reasonable arrangement of operation cycle.

Key words: cracking furnace, operation cycle, energy consumption, ultrahigh pressure steam