隔板式内循环流化床的流动特性研究  

EXPERIMENTAL STUDY ON PARTICLE FLOW CHARACTERISTICS IN A CLAPBOARD-TYPE INTERNAL CIRCULATING FLUIDIZED BED REACTOR

作　　者：黄立成[1,2] 马隆龙[1] 周肇秋[1] 阴秀丽[1] 吴创之[1] 

机构地区：[1]中国科学院广州能源研究所,中国科学院可再生能源与天然气水合物重点实验室,广州510640 [2]中国科学院研究生院,北京100039

出　　处：《太阳能学报》2008年第7期900-904,共5页Acta Energiae Solaris Sinica

基　　金：国家高技术研究发展(863)计划项目(2003AA514010);广东省自然科学基金团队项目(003045)

摘　　要：以石英砂和稻壳为实验床料,在隔板式内循环流化床气化炉冷态实验装置上对颗粒的内循环流动特性进行了研究,考察了高速区和低速区的流化速度、结构尺寸和侧风量等对颗粒内循环流动的影响。结果表明:在保持低速区流化速度一定的条件下,随着高速区风速增大,颗粒循环量先增大后减小;流化速度不变的条件下,颗粒循环量随孔口和侧风量的增大而增加。但增加趋势逐渐变缓。实验给出了合理的运行设计参数。通过实验数据回归,得到了石英砂和稻壳通过隔板式内循环流化床孔口的颗粒循环量关联式,计算结果与实验值误差分别小于6%和14%,能较好地预测孔口颗粒流动。The particle flow characteristics in a clapboard-type internal circulating fluidized bed reactor was investigated using two kinds of bed material, i.e. rice husk and quartz sand. The effects of fluidization velocity, structure dimension, and amount of side air on the solids circulation rate between high velocity zone and low velocity zone were studied. The results showed that the solids circulation rate reached a maximum value and then decreased with increasing gas velocity of the high velocity zone, when the gas velocity of the low velocity zone was kept constant. The solids circulation rate showed an increasing trend with the rise in the orifice size and the amount of side air and became uniform gradually. The recommended parameters for the design of the clapboard-type internal circulating bed gasifier were given based on the experimental data. A correlation equation of the solids circulation rate with the pressure drop and fluidized velocity was given for rice husk and quartz sand respectively. It was used to predict the flow characteristics of particles in orifice region, good agreement between predicted values and experimental data was found.

关 键 词：内循环流化床 流动特性 生物质气化 

分 类 号：TK6[动力工程及工程热物理—生物能]