A Study of Particle Movement in a Gas-fluidized Bed

Jin Yong; Yu Zhiqing; Zhang Li and Wang ZhanwenChemical Engineering Department; Qinhua University

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A Study of Particle Movement in a Gas-fluidized Bed

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- A Study of Particle Movement in a Gas-fluidized Bed
- CIESC Journal Issue 1, (1981)
- 作者机构：
  
  清华大学化学与化学工程系,清华大学化学与化学工程系,清华大学化学与化学工程系,清华大学化学与化学工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 March 1981，
  
  Published：25 March 1981
- 稿件说明：
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Jin Yong, Yu Zhiqing, Zhang Li and Wang ZhanwenChemical Engineering Department, et al. A Study of Particle Movement in a Gas-fluidized Bed[J]. CIESC Journal, 1981, (1).
DOI：

Jin Yong, Yu Zhiqing, Zhang Li and Wang ZhanwenChemical Engineering Department, et al. A Study of Particle Movement in a Gas-fluidized Bed[J]. CIESC Journal, 1981, (1). DOI：

摘要

研究流化床中固体颗粒的运动规律

对改进流化床反应器的数学模型是十分必需的。本文通过激光示踪法观察了固体颗粒在气泡作用下的不同运动方式

测定了在各种气泡直径下的尾涡更新长度及不同床层高度下颗粒的循环量。试验结果表明床内各截面颗粒循环量是随着该截面距分布板高度的增加而增加的。在对尾涡体积与气泡体积之比f_ω进行推算后

提出f_ω随气泡体积增加而增加的假定

同时进行了理论分析。

Abstract

A laser technique was developed for the purpose of investigating the movement of particles in a two-dimensional gas-fluidized bed. With the aid of this technique three typical modes of these particles movements influenced by the bubble were observed. A wake renewal length was measured. It was discovered that

the ratio of wake volume to bubble volume

should be considered not as a constant throughout the bed but as a function of the bubble volume. Under the same superficial gas velocity through the bed

the intensity of particle circulation was different at different heights and heigher levels more intensified circulations were

observed.

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