不均匀布风的内循环流化床特性研究

STUDY OF UN-UNIFORM DISTRIBUTOR OF INTERNALLY CIRCULATING FLUIDIZED BED

开发了一种新型的内旋流流化床气体分布板 ,像传统内循环流化床气体分布板一样 ,该分布板也有两个区域 ,但产生内循环的机理不同 ,其内循环不是由两个区域的不同气体流速产生 ,而是由两个区域的不同气体通量控制 ,中部为低开孔率区 ,运行时呈移动床状态 ,周围为高开孔率区 ,运行时呈流态化状态 ,两种状态共同作用 。

A new type distributor of internally circulating fluidized bed (ICFB) was developed based on previous researcher's work.It has two zones:one locates in the central zone of distributor with a far pitch of holes (lower opening ratio),forming a moving bed,and another locates in the margin zone of distributor with a near pitch of holes(higher opening ratio),forming a fluidized bed.The two zones share the same wind box.The distributor was studied in a transparent fluidized bed apparatus.An internal circulation was observed.