文献类型：期刊文献

英文题名：Comprehensive CFD Simulation of Product Yields and Coking Rates for a Floor- and Wall-Fired Naphtha Cracking Furnace

作者：Hu, Guihua[1];Wang, Honggang[1];Qian, Feng[1];Zhang, Yu[1];Li, Jinlong[1];Van Geem, Kevin M.[2];Marin, Guy B.[2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Control & Optimizat Chem Proc, Minist Educ, Shanghai 200237, Peoples R China;[2]Univ Ghent, Lab Chem Technol, B-9000 Ghent, Belgium

年份：2011

卷号：50

期号：24

起止页码：13672

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20115114619260);WOS:【SCI-EXPANDED(收录号:WOS:000297946400010)】；

基金：This work was supported by the National Science Fund for Distinguished Young Scholars (No. 60625302), 973 Program of China (No. 2012CB720500), National High-Tech Research and Development Program of China (No. 2009AA04Z159), and the Shanghai Leading Academic Discipline Project (No. B504). The financial support from the BOF Bilateral Scientific Cooperation (ECUST/LCT) and the Long Term Structural Methusalem Funding by the Flemish Government (No. BOF09/01M00409) and "111" Project by the Chinese Government (No. B08021) are acknowledged.

语种：英文

外文关键词：Computational fluid dynamics - Cracks - Furnaces - Flue gases - Naphthas

摘要：A coupled furnace/reactor simulation was conducted to determine product yields and coking rates for an industrial SL-II naphtha cracking furnace fired by both floor and wall burners. The process gas side, as well as the fire side, is simulated using the computational fluid dynamics (CFD) approach. The molecular kinetic model of Kumar and co-workers was used to simulate the naphtha cracking reactions in the reactor. The results show that the asymmetrical design of the furnace results in asymmetrical profiles of flue gas velocity, temperature, and concentration, and leads to poor heat supply of the wall burners on the front wall as well as a high-temperature zone in the crossover section. The recirculation of flue gas caused by the positioning of burners makes the temperature more uniform in the middle of the furnace. Good agreement between simulation and industrial product yields has been obtained without any tuning of the kinetics, indicating that the proposed approach can be used as a guide for further optimization of geometries and operating parameters of naphtha cracking furnaces with burners located both in the floor and in the wall. The coking rate profile reveals that the maximum coking rate is not located at the coil outlet or near the last reactor bend, but rather at a height of 7 m in the second reactor pass.