Experimental investigation of bed-to-wall heat transfer in fluidized beds of a Geldart B sorbent particle under a full spectrum of fluidization regime

作     者：Xu, Chenhuan Zhang, Yongmin Wang, Liang Zhang, Yiming Yang, Tianlei Qiu, Feng Liu, Cenfan Jiang, Shuai Dong, Ke 

作者机构：China Univ Petr State Key Lab Heavy Oil Proc Beijing 102249 Peoples R China Beijing DERUNCHEN Environm Protect Technol Co Ltd Beijing 100022 Peoples R China China Special Equipment Inspect & Res Inst Key Lab Special Equipment Safety & Energy Saving S Beijing 100029 Peoples R China 

出 版 物：《PARTICUOLOGY》 (颗粒学报（英文版）)

年 卷 期：2024年第93卷第10期

页      面：235-246页

核心收录：

学科分类：07[理学] 0817[工学-化学工程与技术] 070203[理学-原子与分子物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China 

主　　题：Bed-to-wall heat transfer Solid amine sorbent Geldart B particle Full spectrum of fluidization regime Correlation CONTINUOUS CO2 CAPTURE TEMPERATURE HYDRODYNAMICS TRANSITION TUBE INTEGRATION TRANSPORT 

摘      要：Fluidization technology has been used in CO 2 capture processes, the successful design and operation of the heat exchangers involved in this process require much information on the bed-to-wall heat transfer of the sorbent particles in fluidized states. In this study, the bed-to-wall heat transfer coefficient ( h ) of a solid amine sorbent was measured by a heat transfer probe in a large-scale circulating fluidized bed cold model unit, where full spectrum of fluidization regimes can be realized. The corresponding hydrodynamic signals were also studied by pressure sensors and optical fiber probes to further explain the newly discovered phenomenon. The results show that in a dense bed, due to the counterbalanced effect of time fraction of packet and packet renewal frequency, h of the Geldart B particle reaches a peak within the bubbling fluidized regime, and the radial distribution of h are opposite in bubbling and turbulent fluidized regimes. In a fast fluidization regime, gas convection becomes the dominant factor affecting h when the solids holdup is low enough. Correlations were provided or recommended to guide the design of heat exchangers in the fluidized bed CO 2 capture processes. (c) 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.