Local heat transfer properties in co- and counter-current G-L-S magnetically stabilized fluidized beds  

作　　者：Jinli Zhang Ming Zhang Wei Li Xiaofang Li Xiangkun Meng Baoning Zong 

机构地区：[1]School of Chemical Engineering Technology, Tianjin University, Tianjin 300072, China [2]Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China

出　　处：《Particuology》2011年第1期44-50,共7页颗粒学报（英文版）

基　　金：The authors are grateful for the financial support from 973 Program (2006CB202500);the NSFC (21076144)

摘　　要：Heat transfer coefficients were measured by immersed probes in co- and counter-current G-L-S magnetically stabilized fluidized beds （MSFBs） using air, water and nickel-alloy particles as the gas, liquid and solid phases. Influences of major factors, including magnetic field intensity, superficial gas and liquid velocities, liquid viscosity and surface tension, on heat-transfer properties were studied experimentally, indicating that both co- and counter-current G-L-S MSFB can provide relatively uniform radial distribution of heat transfer coefficients under appropriate operation conditions, thus controlling operation temperature for highly exothermic multi-phase reaction systems. Two correlations were provided to estimate accurately heat transfer properties in both co- and counter-current G-L-S MSFB systems, with an average error of less than 10%.Heat transfer coefficients were measured by immersed probes in co- and counter-current G-L-S magnetically stabilized fluidized beds （MSFBs） using air, water and nickel-alloy particles as the gas, liquid and solid phases. Influences of major factors, including magnetic field intensity, superficial gas and liquid velocities, liquid viscosity and surface tension, on heat-transfer properties were studied experimentally, indicating that both co- and counter-current G-L-S MSFB can provide relatively uniform radial distribution of heat transfer coefficients under appropriate operation conditions, thus controlling operation temperature for highly exothermic multi-phase reaction systems. Two correlations were provided to estimate accurately heat transfer properties in both co- and counter-current G-L-S MSFB systems, with an average error of less than 10%.

关 键 词：Magnetically stabilized fluidized bed Heat transfer Gas–liquid–solid 

分 类 号：TQ051.13[化学工程] TQ174.75