• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>World Congress on Particle Technology >Flow Pattern Transition of Fine Cohesive Powders in a Gas-Solid Fluidized Bed under Mechanical Vibrating Conditions
【24h】

Flow Pattern Transition of Fine Cohesive Powders in a Gas-Solid Fluidized Bed under Mechanical Vibrating Conditions

机译：机械振动条件下气固流化床细腻粉末的流动模式转变

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this study, the fluidization characteristics for fine cohesive powders under mechanical vibrating conditions were experimentally investigated. In a case of handling of fine cohesive powders with fluidized bed, stable gas channels and cracks were easily formed in the bed due to the strong cohesiveness acting among particles. A mechanical vibration is one of the methods to improve the fluidity of fine cohesive powders. In this study, we focused on the transition of the dominant bed flow pattern induced by mechanical bed vibrating conditions. The powders used in this study were different sizes (0.7-20μm) and materials (silica, alumina, polymer). All powders belonged to group-C in the Geldart classification. The bed expansion ratio was lower in the relatively smaller vibration strengths regardless of the gas velocity, however, it steeply increased with larger a certain vibration strength. Form the visual observation of the bed, the bubble formation appeared with larger than such a critical vibration strength. This implied that the dominant bed fluidization pattern was transitioned from channeling behavior (group-C) to bubbling behavior (group-A or -AC) by the addition of the mechanical vibration.
机译：在该研究中，实验研究了机械振动条件下的细粘性粉末的流化特性。在处理具有流化床的细粘性粉末的情况下，由于颗粒之间的强粘性，在床中容易形成稳定的气体通道和裂缝。机械振动是改善细粘性粉末流动性的方法之一。在这项研究中，我们专注于机械床振动条件诱导的主床流动模式的转变。本研究中使用的粉末是不同的尺寸（0.7-20μm）和材料（二氧化硅，氧化铝，聚合物）。所有粉末都属于Geldart分类中的Group-C。无论气速度如何，床膨胀比在相对较小的振动强度下较低，但是，由于一定的振动强度较大，它急剧增加。形成床的视觉观察，气泡形成出现大于这种临界振动强度。这意味着通过添加机械振动，从通道行为（Group-C）转变为起泡行为（Group-A或-Ac）的显着床流化模式。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号