CFD simulation of novel fluidizer technology in feedstock injection zone of FCC riser

被引：0

作者：

Chen S. ^{[1
,2
]}

Fan Y. ^{[1
]}

Yan Z. ^{[1
]}

Li F. ^{[2
]}

Wang W. ^{[1
]}

Lu C. ^{[1
]}

机构：

[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing

[2] State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, CAS, Beijing

来源：

Lu, Chunxi (lcx725@sina.com) | 1600年 / Materials China卷 / 67期

关键词：

CFD; EMMS; Feed injection zone; Fluid catalytic cracking; Fluidizer; Riser; Secondary flow;

D O I：

10.11949/j.issn.0438-1157.20160401

中图分类号：

学科分类号：

摘要：

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. © All Right Reserved.

引用

页码：3179 / 3190

页数：11

共 23 条

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