scholarly journals Measuring Technologies for CFB Solid Circulation Rate: A Review and Future Perspectives

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 417
Author(s):  
Xiandong Liu ◽  
Man Zhang ◽  
Shuangming Zhang ◽  
Yi Ding ◽  
Zhong Huang ◽  
...  

Solid circulation rate (Gs) represents the mass flux of circulating particles in circulating fluidized bed (CFB) systems and is a significant parameter for the design and operation of CFB reactors. Many measuring technologies for Gs have been proposed, though few of them can be applied in industrial units. This paper presents a comprehensive study on measuring technologies, and the results indicate that though the accumulation method is most widely applied, it is constrained by the disturbance of normal particle circulation. Some publications have proposed mathematic models based on pressure drop or other parameters to establish Gs measurement models; these necessitate the accurate modeling of complicated gas-solid flows in industrial devices. Methods based on certain measurement devices to specify parameters like velocity require device endurance in the industrial operation environment and stable local gas-solid flow. The Gs measuring technologies are strongly influenced by local gas-solid flow states, and the packed bed flow in standpipes make the bottom of standpipes an ideal place to realize Gs measurement.

2006 ◽  
Vol 61 (2) ◽  
pp. 766-774 ◽  
Author(s):  
Emad Ahmed Mahmoud ◽  
Tsutomu Nakazato ◽  
Nobuyoshi Nakagawa ◽  
Kunio Kato

2012 ◽  
Vol 600 ◽  
pp. 261-264
Author(s):  
Teng Ge Mi ◽  
Ying Zhao ◽  
Chang Qing Dong ◽  
Wei Liang Cheng

In this paper, a dual fluidized bed has been established. The effect of bed material build-up height and gas velocity on the solid circulation rate of CFB (circulating fluidized bed) and BFB (bubble fluidized bed) has been studied. The results show that the solid circulation rate is increased with the increasing of gas velocity Uc and the bed material build-up height. Bed material build-up height of BFB and CFB is changed with the changing of gas velocity Uc. The bed material heights of CFB and BFB have been also investigated in this experiment.


2014 ◽  
Vol 14 (10) ◽  
pp. 1037-1042 ◽  
Author(s):  
Nirmala Gnanasunda ◽  
Muruganandam Loganathan ◽  
Kumar Perumal

2018 ◽  
Vol 336 ◽  
pp. 1-11 ◽  
Author(s):  
Michael Stollhof ◽  
Stefan Penthor ◽  
Karl Mayer ◽  
Hermann Hofbauer

2006 ◽  
Vol 3 (1) ◽  
pp. 19 ◽  
Author(s):  
A.H. Fakeeha ◽  
M.A. Soliman ◽  
A.A. Ibrahim

In this paper, simulation and sensitivity studies for propane oxidative dehydrogenation to which were propylene in a circulating fluidized bed is undertaken using a previously developed model. Various experimental kinetics, obtained by several investigators for the reaction using different catalysts, are employed in this study. A comparison is made for the performance of certain catalysts when used in a circulating fluidized bed reactor. The effects of changing reaction temperature, solid circulation rate, feed composition, pressure, and gas superficial velocity on reactant conversion and product selectivity and yields are studied. It was found that the catalyst prepared by Ramos et al. is superior to the others with respect to yield. 


2003 ◽  
Vol 130 (1-3) ◽  
pp. 203-210 ◽  
Author(s):  
Hiroyuki Kage ◽  
Ryuhei Abe ◽  
Ryusuke Hattanda ◽  
Tao Zhou ◽  
Hironao Ogura ◽  
...  

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