Abstract: The laboratory evaluation data of steam cracking raw materials and the calibration data of industrial steam cracking furnaces (abbreviated as cracking furnace) were analyzed and integrated, and combined with computer simulation optimization technology, the steam cracking reaction network was constructed using the free radical reaction mechanism, and the raw material prediction model, tubular reactor reaction heat transfer model, furnace heat transfer model and reaction coke model were systematically developed. The EcSOS software for simulating and optimizing cracking furnaces with complete functions and friendly interface was developed. The results of industrial application of EcSOS software showed that the simulation calculation results were in good agreement with the actual production situation of industrial cracking furnaces and the results of laboratory steam cracking evaluation tests, the relative errors of ethylene and propylene yields were less than 2% and 3%, respectively, and the simulation optimization calculation time of the software was less than 0.5 h. The operation conditions of cracking furnace were optimized by using EcSOS software, and the yield of target products was effectively improved, and the operation cycle was prolonged by 3 d. The launch of EcSOS software filled the blank in this field in China, and promoted the digitalization and intellectualization of steam cracking technology in China.

Key words: ethylene, propylene, 1,3-butadiene, steam cracking furnace, simulation, reaction network