Numerical simulation of 3D fluidized bed biomass gasification based on CPFD

被引：0
|
作者：
Ren X. [1 ]
Chen Q. [1 ]
Yang H. [1 ]
Zhang S. [1 ]
Wang X. [1 ]
Chen H. [1 ]
机构：
[1] State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 12期
关键词：
Biomass; CPFD; Fluidized bed; Gasification; Numerical simulation;
D O I：
10.11949/0438-1157.20200613
中图分类号：
学科分类号：
摘要：
Based on computational particle fluid dynamics (CPFD), a three-dimensional bubbling fluidized bed steam-air mixed gasification numerical model was established, and it was verified with experiment trials. The results show that the simulation and experiment have good consistency. Based on the model, the gas distribution and temperature distribution in the gasifier were studied; meanwhile, the biomass properties (particle size, water content, types) and operating conditions (gasification temperature, bed height) were investigated. The results show that there is an optimal value for the impact of biomass particle size on gasification performance, with an average particle size of 0.6 mm being the best; a higher water content will reduce the output of combustible gas and is not conducive to the gasification reaction. Among the four types of biomass, sawdust gasification has the highest efficiency, the largest combustible gas production, and the highest gas calorific value. Rice husk is second only to sawdust but its carbon conversion rate is higher than that of sawdust; increasing the gasification temperature can increase the proportion of combustible gas and increase gasification efficiency; while the change of initial bed height can change the ratio of H2/CO. This experiment provides a theoretical reference for biomass steam/air gasification, which is helpful for the selection and processing of biomass raw materials, and also facilitates the amplification and optimization of the gasifier. © 2020, Editorial Board of CIESC Journal. All right reserved.
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页码：5763 / 5773
页数：10
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