Prediction of agglomerate size for ultrafine particles in acoustic spouted fluidized-bed with draft tube

GAO Kaige; LEI Yuzhuang; LI Hainian; ZHOU Yong

doi:10.11949/j.issn.0438-1157.20161792

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Prediction of agglomerate size for ultrafine particles in acoustic spouted fluidized-bed with draft tube

更新时间：2025-12-10

- Prediction of agglomerate size for ultrafine particles in acoustic spouted fluidized-bed with draft tube
- CIESC Journal Issue 6, Pages: 2290-2297(2017)
- 作者机构：
  
  四川大学化学工程学院,四川,成都,610065
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20161792
  CLC： Q021
- Online First：05 June 2017，
  
  Published：05 June 2017
- 稿件说明：
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GAO Kaige, LEI Yuzhuang, LI Hainian, et al. Prediction of agglomerate size for ultrafine particles in acoustic spouted fluidized-bed with draft tube[J]. CIESC Journal, 2017, (6): 2290-2297.
DOI：

GAO Kaige, LEI Yuzhuang, LI Hainian, et al. Prediction of agglomerate size for ultrafine particles in acoustic spouted fluidized-bed with draft tube[J]. CIESC Journal, 2017, (6): 2290-2297. DOI： 10.11949/j.issn.0438-1157.20161792.

摘要

超细粉的流化性能与聚团尺寸密切相关。通过分析超细粉聚团在声场导向管喷流床中的形成过程，提出了高速射流的剪切作用和聚团间的碰撞作用是决定聚团尺寸的主要原因。在此基础上，结合聚团在射流剪切过程和聚团间碰撞过程中的力平衡分析，建立了声场导向管喷流床中聚团尺寸分布的预测模型；并运用这一模型成功预测了不同射流气速下，超细TiO2颗粒在声场导向管喷流床中的聚团平均直径和聚团尺寸分布。

Abstract

The fluidization property of ultrafine particles is closely related to their agglomerate size. Through the analysis of the formation process of ultrafine powder agglomerates in an acoustic spouted fluidized-bed with a draft tube

it is proposed that the shearing action of high speed jet and collision between agglomerates were the dominating factors to influence agglomerate size. Based on the force balance analysis acting on the agglomerates during the jet shearing process and collision between agglomerates

a model to predict agglomerate size distribution in an acoustic spouted fluidized-bed with a draft tube was established. The average size of agglomerates and their size distribution of TiO2 ultrafine powder at different jet velocities in the bed were predicted by the model successfully.

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