Dynamic behaviors of feed jets and catalyst particles in FCC feed injection zone

被引：16

作者：

Yan, Zihan ^{[1
]}

Fan, Yiping ^{[1
]}

Bi, Xiaotao ^{[2
]}

Lu, Chunxi ^{[1
]}

机构：

[1] China Univ Petr, Coll Chem Engn, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China

[2] Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada

来源：

CHEMICAL ENGINEERING SCIENCE | 2018年 / 189卷

关键词：

FCC riser; Feed injection zone; Cluster; Two-phase flow; CIRCULATING FLUIDIZED-BED; GROUP-B PARTICLES; SOLID 2-PHASE FLOW; CLUSTER CHARACTERISTICS; WAVELET ANALYSIS; FEEDSTOCK INJECTION; RISER REACTORS; HIGH-DENSITY; CFB RISER; SIZE;

D O I：

10.1016/j.ces.2017.12.049

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The gas-solid dynamic behaviors in FCC feed injection zone are investigated by analyzing the solids holdup fluctuation signals. Four different phases are found during the mixing between jet and particles, i.e., the cluster phase, the denser dispersed particulate phase, the diluter dispersed particulate phase and the gas phase (without particles). The clusters in the feed jets-solids mixing zone are identified by combining wavelet decomposition with sensitivity analysis method. The time fractions of different phases in the upward and downward feed injection schemes are calculated to show the effects of different types of injections. Results show that the time fractions of cluster phase and gas phase are quite high in the feed influence zone of upward injection scheme. While low cluster and gas time fractions as well as high dispersed particulate time fraction are obtained when the injections are downward. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：380 / 393

页数：14

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