Flow Characteristics in Slot‐Rectangular Spouted Beds with Draft Plates
Flow Characteristics in Slot‐Rectangular Spouted Beds with Draft Plates
复制标题
带尾水板的槽缝矩形喷动床的流动特性
DOI：
10.1002/cjce.5450820110
复制
发表时间：
2008
影响因子：
2.1
通讯作者：
J. Grace
中科院分区：
文献类型：
--
作者：
Baolin Luo;C. J. Lim;L. Freitas;J. Grace
对矩形狭缝喷动床进行了实验研究，该喷动床具有横跨整个柱厚度的空气入口狭缝和用于帮助控制固体循环速率的垂直导流板。随着表观气速的增加，导流板间的流动由鼓泡→段塞流→喷动，板间为稀气力，两侧移动床向下运动。然而，维持两岸的稳定和对称流动存在困难。一旦建立了喷动，压降和局部空隙率以与常规喷动床大致类似的方式随着气体速度、颗粒尺寸和气体入口尺寸而变化。
An experimental investigation was conducted of slot-rectangular spouted beds with air entry slots spanning the full thickness of the column and vertical draft plates intended to help control the solids circulation rate. With increasing superficial gas velocity, the flow between the draft plates changed from bubbling to slugging and then to spouting with dilute pneumatic between the plates and moving-bed downward motion on both sides. However, there was difficulty maintaining stability and symmetrical flow on the two sides. Once spouting is established, pressure drops and local voidages vary with gas velocity, particle size and gas entry size in broadly similar manners as for conventional spouted beds.