生物质秸秆在加料斗内的流动行为研究  

EXPERIMENTAL STUDY ON FLOW BEHAVIOR OF BIOMASS PARTICLE IN A FEEDER

作　　者：金保升[1] 张勇[1] 章名耀[1] 钟文琪[1] 孙志翱[1] 

机构地区：[1]东南大学洁净煤发电及燃烧技术教育部重点实验室,南京210096

出　　处：《太阳能学报》2008年第9期1131-1134,共4页Acta Energiae Solaris Sinica

摘　　要：基于生物质秸秆加料的困难,对生物质秸秆物料在加料斗内的流动行为进行研究。在储料量为100kg的加料斗试验装置上,结合出料量分析和可视化观察,系统研究了物料特性、料位高度、螺旋轴转速及运转方式等因素对物料流动行为及出料速率的影响。结果表明,物料堆积密度大、含湿量高、物料易在加料斗内"搭桥",从而影响出料质量;原始料位高度直接影响出料速率,在同样螺旋转速下,料位高,出料快;料位低,出料慢,相同料位高度则出料速率基本一致;随着螺旋转速的提高,起始出料速率明显增加,随后增加缓慢;螺旋轴的运转方向对物料的堆积和流动具有不同的影响,正转压紧物料,不利于出料,反转疏松物料,出料更顺畅均匀。To investigate the flow behavior of biomass particle in feeder, a feeder with a full fill level of 90 kg was built. Effects of Material property, fill level, rotation speed and rotation direction of helical stirrer on the flow behavior have been systematically investigated by data analysis and visual observation. The results indicated that it is hard for the biomass particle with a high bulk density and high moisture to flow in the feeder, which leads to bad discharging quality. At the same rotational speed of helical stirrer, the much higher the fill level is, the rather higher the discharging rate is. However, the discharging rate keep constant at the same fill level. With the increase of rotation speed, discharging rate increases significantly and then increases gradualy. Meanwhile, the rotation direction of helical stirrer exerts an important influence on the flow behavior and counter rotation is helpful for the improvement of discharging quality.

关 键 词：加料 流动行为 生物质秸秆 

分 类 号：TK6[动力工程及工程热物理—生物能]