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Effect of fluidizing velocity on gas bypass and solid fraction in a dual fluidized bed gasifier and a cold model

Effect of fluidizing velocity on gas bypass and solid fraction in a dual fluidized bed gasifier and a cold model

作     者:Mook Tzeng Lim Woei-Lean Saw Shusheng Pang 

作者机构:Department of Chemical and Process EngineeringUniversity of Canterbury Centre for Energy TechnologySchool of Chemical EngineeringUniversity of Adelaide 

出 版 物:《Particuology》 (颗粒学报(英文版))

年 卷 期:2015年第13卷第1期

页      面:58-65页

核心收录:

学科分类:080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理] 

基  金:funded by the Ministry of Business Innovation and Employment New Zealand 

主  题:Cold model Hydrodynamics Steam gasification Dual fluidized bed 

摘      要:Dual fluidized bed gasifiers (DFBG) are effective in producing nitrogen-free syngas from biomass. How- ever, to improve the gasifier performance, pressure drops and solid fractions within the DFBG system need to be controlled. In this study, the effects of varying the fluidizing velocity in the fast fluidized bed (FFB) on the pressure drops and the solid fractions in the system were investigated in a 100 kW DFBG and in a dual fluidized bed cold model (DFCM). Based on the experimental results, empirical correlations were developed to predict the height-averaged solid fraction in the bottom section of the FFB. Accuracy and advantages of the correlations were analyzed. The correlation is useful for design and modeling of the DFBG systems where the height-averaged solid fraction is required to be determined.

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