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过程工程学报 ›› 2016, Vol. 16 ›› Issue (3): 367-373.DOI: 10.12034/j.issn.1009-606X.215362

• 流动与传递 • 上一篇    下一篇

内设/不设中心管两股催化剂混合预提升结构内的颗粒浓度分布

申奇 王莹 范怡平 卢春喜   

  1. 中国石油天然气管道工程有限公司 中国石油管道公司秦皇岛输油气分公司 中国石油大学(北京)化学工程学院 石油大学（北京）重质加工国家重点实验室
  • 收稿日期:2015-10-29 修回日期:2016-01-22 出版日期:2016-06-20 发布日期:2017-04-28
  • 通讯作者: 申奇

SHEN Qi WANG Ying FAN Yi-ping LU Chun-xi   

  1. China Petroleum Pipeline Engineering Corporation Qinhuangdao Branch of PetroChina Pipeline Company State Key Laboratory of Heavy Oil, China University of Petroleum State Key Laboratory of Heavy Oil, China University of Petroleum (Beijing)
  • Received:2015-10-29 Revised:2016-01-22 Online:2016-06-20 Published:2017-04-28
  • Contact: SHEN Qi

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摘要： 采用光纤探针分别考察了内设与不设中心管两种预提升结构内FCC催化剂颗粒浓度的分布，并引入径向不均匀指数RNI(ri)对颗粒浓度径向分布的不均匀性进行定量分析. 结果表明，在扩径区(中心管区)，内设中心管的预提升结构内颗粒浓度梯度较大；而在提升管入口区，内设中心管的预提升结构内颗粒浓度分布更均匀；相比传统结构，无中心管的提升管入口区内RNI(ri)约减小65%，内设中心管时约减小75%；给出了内设中心管的预提升结构内平均固含率轴向分布的经验模型，计算值与实验值吻合较好，可供工程设计参考.

关键词: 预提升, 中心管, FCC催化剂, 颗粒浓度, 径向不均匀指数

Abstract: The distribution characteristics of FCC catalyst particle concentration in two catalytic cracking pre-lifting structure (with and without central tube) were investigated using optical fiber. The radial nonuniform index was also introduced to quantify the heterogeneity of particle concentration. The results show that the gradient of particle concentration of the structure with central tube in the expanding area (central tube area). While in the riser entrance area, the distribution of particle concentration in the structure with central tube is more uniform. Compared with traditional structure, radial Non-uniformity index of particle concentration in the two structures of riser sharply decreases 65% with central tube and 75% without that. The empirical model of the axial distribution of average solid holdup in the structure with central tube was put forward. The calculated values are in good agreement with the experimental ones, it can be used for engineering design purpose.

Key words: pre-lifting, central tube, FCC catalyst, particle concentration, radial non-uniformity index

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