BED COLLAPSE BEHAVIOR OF SiO<sub>2</sub> NANO-PARTICLES

WANG Yao; JIN Yong; WEI Fei; LUO Tian

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BED COLLAPSE BEHAVIOR OF SiO₂ NANO-PARTICLES

更新时间：2025-12-10

- BED COLLAPSE BEHAVIOR OF SiO₂ NANO-PARTICLES
- CIESC Journal Issue 11, (2001)
- 作者机构：
  
  清华大学化学工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 November 2001，
  
  Published：25 November 2001
- 稿件说明：
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WANG Yao, JIN Yong, WEI Fei, et al. BED COLLAPSE BEHAVIOR OF SiO₂ NANO-PARTICLES[J]. CIESC Journal, 2001, (11).
DOI：

WANG Yao, JIN Yong, WEI Fei, et al. BED COLLAPSE BEHAVIOR OF SiO₂ NANO-PARTICLES[J]. CIESC Journal, 2001, (11). DOI：

摘要

在直径为 35mm的小型流化床中考察了纳米级SiO2 颗粒 (商品牌号R972 )的床层塌落行为 .该种经过表面改性的颗粒可以通过自团聚形成稳定、均匀的聚团散式流化 .实验证明

这种颗粒的床层塌落行为明显不同于普通的GeldartA类与C类颗粒

其塌落过程可分为恒速沉降阶段和减速压实阶段 .通过对塌落速率的分析

提出了聚团散式流化的床层塌落机制

Abstract

The collapse behavior of nano-particle SiO 2(R972)is investigated in a 35 mm diameter fluidized bed.This powder can be easily and uniformly fluidized via self-aggregation.Collapse experiments indicate that the bed collapse curve of SiO 2 particles is different from that of Geldart Group A and C particles.By analyzing the collapsing velocity

the bed collapse process can be clearly divided into two stages:a rapid initial sedimentation stage with constant velocity

and a decelerating stage of solids consolidation for the incompletely supended agglomerates.The bed collapse mechanism of agglomerate particulate fluidization is proposed.

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BED COLLAPSE BEHAVIOR OF SiO2 NANO-PARTICLES

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BED COLLAPSE BEHAVIOR OF SiO₂ NANO-PARTICLES