燃稻草流化床床料烧结特性的研究  

INVESTIGATION OF THE AGGLOMERATION IN THE RICE STRAW FIRED FLUIDIZED BED

作　　者：刘欢鹏[1] 冯玉杰[2] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]哈尔滨工业大学市政环境工程学院,哈尔滨150090

出　　处：《太阳能学报》2010年第2期248-252,共5页Acta Energiae Solaris Sinica

摘　　要：以燃稻草流化床床料烧结现象为研究对象,通过实验研究了流化风速和床温对流化时间的影响规律以及调节运行条件对恢复流化的作用规律以及烧结块的形成机理。研究结果表明,当床温达到750℃以上时,会出现明显的床料烧结现象;流化时间随着床温的升高或流化风速的降低而缩短;流化停止后降低床温至700℃可使流化基本恢复。对烧结块中处于不同发展阶段的粘结物的SEM/EDS分析结果表明,粘结物是由稻草颗粒在其燃烧过程中形成的,并提出了新的烧结块形成机理假设。The influence of fluidization air velocity and bed temperature on the fluidization time was investigated.And the formation mechnisem of agglomerate was studied too.The experment reults show that the obverious agglomeration phenomenon occurs when the bed temperature exceeds 750℃.The fluidization time reduces with the increase of bed temperature and the decrease of fluidization air velocity.Fluidization can be recovered by decreasing bed temperature below 700℃.The binding materials under different stage in the agglomerate were studied by the SEM/EDS analysis method.The results show that the binding material is formed by the biomass particles during the combustion,so a new agglomerate formation mechnisem is proposed.All the experimental results can be helpful for understanding the agglomeration of biomass-fired fluidized bed.

关 键 词：流化床 流化时间 烧结块 粘结物 

分 类 号：TK6[动力工程及工程热物理—生物能]