化学工业与工程
Home  |   |  About Journal  |  Editorial Board  |  Instruction  |  Subscriptions  |  Download  |  Publication Ethics  |  Contacts Us  |  Chinese
Chemcial Industry and Engineering 2024, Vol. 41 Issue (2) :77-85    DOI: 10.13353/j.issn.1004.9533.20230829
Current Issue | Next Issue | Archive | Adv Search << | >>
Characterization of cluster distribution in a high-density circulating fluidized bed based on a time-varying cluster identification threshold
SONG Dashan, LI Zhihui, SU Xin, WANG Chengxiu, LAN Xingying, GAO Jinsen
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

Abstract
Reference
Related Articles
Download: PDF (4447KB)   HTML ()   Export: BibTeX or EndNote (RIS)      Supporting Info
Abstract To investigate the characteristics of clusters within a high-density riser, measurements of the transient solids holdup were carried out at different solids circulation rates(Gs=100~1800 kg·m-2·s-1) in an 18 m high circulating fluidized bed riser. Clusters were identified by a time-varying threshold with cluster solids holdup, cluster duration time and cluster velocity. Results indicated that time-averaged solids holdup and cluster characteristics in the high-density circulating fluidized bed were significantly different from those in low-density circulating fluidized bed. At high density conditions, cluster solids holdup was higher up to 0.41. Cluster duration time was up to 5.5 ms. All clusters had a net upward movement with the velocity up to 1.83 m·s-1 at r/R=0.949. Moreover, the axial and radial distribution of the cluster was even at high solids circulation rate with Gs up to 1800 kg·m-2·s-1.
Service
Email this article
Add to my bookshelf
Add to citation manager
Email Alert
RSS
Articles by authors
SONG Dashan
LI Zhihui
SU Xin
WANG Chengxiu
LAN Xingying
GAO Jinsen
Keywordshigh-density   solids holdup   cluster identification   time varying threshold   cluster distribution     
Received 2023-11-15;
About author:
Cite this article:   
SONG Dashan, LI Zhihui, SU Xin, WANG Chengxiu, LAN Xingying, GAO Jinsen.Characterization of cluster distribution in a high-density circulating fluidized bed based on a time-varying cluster identification threshold[J]  Chemcial Industry and Engineering, 2024,V41(2): 77-85
Copyright 2010 by Chemcial Industry and Engineering