STUDY ON BIOMASS CIRCULATION AND GASIFICATION PERFORMANCE IN A CLAPBOARD-TYPE INTERNAL CIRCULATING FLUIDIZED BED GASIFIER
Solid particle flow characteristics and biomass gasification in a clapboard-type internal circulating fluidized bed reactor were investigated. The effect of fluidization velocity on particle circulation rate and pressure distribution in bed show that fluidization velocities of the high and low velocity zones are the main operational parameters to control the particle circulation, and for different velocities of the low velocity zone maximums of internal circulation rates exist and almost come within certain range of the velocity of the high velocity zone, in the experiment that is uH/Umf=2.2～ 2.4 for rice husk and uH/umf=3.5～4.5 for quartz sand. In gasification experiment, air equvalence ratio is the main control parameter. Rice husk gasification gas has its highest heating value of around 5000 kJ/m3 when ER=0.22～0.26, and sawdust gasification gas reaches around 6000～6500 kJ/m3 when ER=0.175～0.24. The gasification efficiency of rice husk reaches the maximum of 77％ at ER=0.28, and the value of sawdust reaches the maximum of 81％ at ER=0.25.
biomass gasification fluidized bed internal circulating
Zhao-qiu ZHOU Long-long MA Xiu-li YIN Chuang-zhi WU Li-cheng HUANG Chu WANG
The Renewable Energy and Gas Hydrate Key Laboratory of Chinese Academy of Sciences Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China
国际会议
广州
英文
1133-1138
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）