Abstract: Combined with the characteristics of independent cracking reaction of multiple identical cracking furnaces in ethylene cracking furnace unit, the equipment layout of the ethylene cracking furnace unit was optimized in three aspects. Firstly, the structure width of each series of cracking furnace was adjusted to the length of the pipe rack, so that the piping layout of a single series can be copied directly to the other series. Secondly, an additional structure was added between the cracking furnace and the pipe rack to expand the space of cracking furnace structure and reduce the structure function of pipe rack. Thirdly, the positions of secondary quench exchanger and tertiary quench exchanger were changed to make the piping arrangement more reasonable. Through these optimizations of the equipment layout, the piping efficiency can be significantly improved.

Key words: ethylene cracking furnace, layout optimization, efficiency improvement