Particle Velocity Distribution in the Bubbling Fluidized Bed

Journal of Petrochemical Universities ›› 2008, Vol. 21 ›› Issue (3): 5-8.

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Particle Velocity Distribution in the Bubbling Fluidized Bed

YANG Kuan-li¹， WANG Qi-cheng¹， ZHANG Kai^1*,DAI Wei-di²，JIANG Jian-chun²

1.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,P.R.China;
2. National Engineering and Technology Research Center of Forest Chemical Industry,Nanjing Jiangsu 210042, P．R．China

Received:2007-12-22 Published:2008-09-20 Online:2017-06-28

鼓泡流化床内颗粒速度分布的研究

杨宽利1, 王其成1, 张锴1* , 戴伟娣2, 蒋剑春2

1.中国石油大学重质油国家重点实验室,北京102249;2.中国林科院林产化学工业研究所,江苏南京210042

作者简介:杨宽利(1979-),男,黑龙江龙镇县,在读硕士。
基金资助:
国家自然科学基金项目(No.20476057;No.20490200)。

Abstract

Abstract:

Radial velocity distributions of two kinds of glass beads, belonging to Geldart type B classification, were investigated at different axial sections in the bubbling fluidized bed with an inner diameter of 0.185 m under different superficial gas velocities. Local particle velocities were measured by using the PV-5A fiber-optical probe. The experimental results indicate that the radial distribution of particle velocities in the bed bottom zone is irregular, where the design of the distributor is dominated. When the axial section is far from the distributor, the particle velocities are higher in the center than those near the wall within the bed, which becomes obvious with increasing superficial gas velocity. Meanwhile, there exists a transitional zone between the above two zones, where the effect of the distributor tends to be weakened. This leads that the radial distribution of particle velocities is regular. Moreover, the amplitude of particle velocity at the same axial position changes sharply with an increase of superficial gas velocity.

Key words: Bubbling fluidized bed , Geldart B powder , Particle velocity distribution

摘要： 在内径0.185m 的鼓泡床内,采用PV-5A型速度仪考察不同表观气速下两种粒径GeldartB类物料
(玻璃微珠)在不同轴向位置颗粒速度径向分布规律。结果表明,在床层底部颗粒速度分布与分布器设计密切相关,
而远离分布器的上部区颗粒速度主要受气泡行为影响,表现为中心区域大而边壁附近小,且随着表观气速的增大这
种趋势变的更加明显;同时在这两个区域之间存在一个过渡区,该区域内分布器的影响明显减弱,导致颗粒速度的
径向分布逐渐趋于一定的规律;而在相同轴向位置处颗粒速度变化幅值的影响会随着表观气速的增大变得剧烈。

关键词: 鼓泡流化床 , , GeldartB物料 , , 颗粒速度分布

YANG Kuan-li， WANG Qi-cheng， ZHANG Kai,DAI Wei-di，JIANG Jian-chun. Particle Velocity Distribution in the Bubbling Fluidized Bed[J]. Journal of Petrochemical Universities, 2008, 21(3): 5-8.

杨宽利, 王其成, 张锴, 戴伟娣, 蒋剑春. 鼓泡流化床内颗粒速度分布的研究[J]. 石油化工高等学校学报, 2008, 21(3): 5-8.

Particle Velocity Distribution in the Bubbling Fluidized Bed

鼓泡流化床内颗粒速度分布的研究

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