化工学报2016，Vol.67Issue(8)：3179-3190,12.DOI:10.11949/j.issn.0438-1157.20160401
催化裂化提升管进料区新型助流剂技术的CFD模拟
CFD simulation of novel fluidizer technology in feedstock injection zone of FCC riser
摘要
Abstract
To improve the gas-solid two-phase mixing and eliminate the effect of secondary flow on the back-mixing near the riser wall in the feedstock injection zone, a novel fluidizer technology is proposed. A protective layer is produced by fluidizer to prevent long-duration contact between catalysts and feed near the wall. Three schemes for this technology (reverse-impact, concurrent-flow and crossed schemes) are used to improve the catalyst-feed mixing and back-mixing near wall by using 3-D CFD simulation. The amount of fluidizer of the optimal scheme is further optimized. The results show that the best is the reverse-impact scheme and the worst is the crossed scheme. The optimal reverse-impact scheme(when the mass flux of fluidizer is equal to the 15% mass flux of feed) can improve the catalyst-feed mixing, prevent the expanding of secondary flow and weaken the intensity of back-mixing at the |r/R|>0.9 near the wall.关键词
提升管/进料区/二次流/助流剂/流化催化裂化/能量最小多尺度模型/计算流体力学Key words
riser/feed injection zone/secondary flow/fluidizer/fluid catalytic cracking/EMMS/CFD分类
能源科技引用本文复制引用
陈昇,范怡平,闫子涵,李飞,王维,卢春喜..催化裂化提升管进料区新型助流剂技术的CFD模拟[J].化工学报,2016,67(8):3179-3190,12.基金项目
国家重点基础研究发展计划项目(2012CB215000)。 （2012CB215000）
