倒锥型液固流化床减小液相返混型的研究

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倒锥型液固流化床减小液相返混型的研究

夏素兰^a; 朱家骅^a; 胡新辉^b

^aSchool of Chemical Engineering, Sichuan University, Chengdu 610065, China
^b Department of Chemical Engineering, East China University of Science and Technology,
Shanghai 200237, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2000-06-28 发布日期:2000-06-28
通讯作者: 夏素兰

Study on Liquid-Phase Axial Dispersion in Converging Taper Liquid-Solid Fluidized Beds

XIA Sulan^a; ZHU Jiahua^a; Hu Xinhui^b

^a School of Chemical Engineering, Sichuan University, Chengdu 610065, China
^b Department of Chemical Engineering, East China University of Science and Technology,
Shanghai 200237, China

Received:1900-01-01 Revised:1900-01-01 Online:2000-06-28 Published:2000-06-28
Contact: XIA Sulan

摘要/Abstract

摘要： It is found analytically that the parabolic radial profile of liquid velocity in
cylindrical liquid-solid fiuidized bed (LSFB) causes particles to circulate around some
radial position. This is the main reason for liquid phase axial dispersions. The liquid-
phase axial dispersion is depressed as the liquid velocity presents a flatter Bessel radial
profile in a converging taper LSFB. The void fraction increases with axial distance in
converging taper LSFB. The behavior produces less liquid-phase axial dispersion.
Experimental results show good coincidence.

关键词: converging taper liquid-solid fiuidized bed;liquid-phase axial dispersion;radial profile of liquid velocity;void fraction

Abstract: It is found analytically that the parabolic radial profile of liquid velocity in
cylindrical liquid-solid fiuidized bed (LSFB) causes particles to circulate around some
radial position. This is the main reason for liquid phase axial dispersions. The liquid-
phase axial dispersion is depressed as the liquid velocity presents a flatter Bessel radial
profile in a converging taper LSFB. The void fraction increases with axial distance in
converging taper LSFB. The behavior produces less liquid-phase axial dispersion.
Experimental results show good coincidence.

Key words: converging taper liquid-solid fiuidized bed, liquid-phase axial dispersion, radial profile of liquid velocity, void fraction

夏素兰, 朱家骅, 胡新辉. 倒锥型液固流化床减小液相返混型的研究[J]. CIESC Journal.

XIA Sulan, ZHU Jiahua, Hu Xinhui. Study on Liquid-Phase Axial Dispersion in Converging Taper Liquid-Solid Fluidized Beds[J]. .

倒锥型液固流化床减小液相返混型的研究

Study on Liquid-Phase Axial Dispersion in Converging Taper Liquid-Solid Fluidized Beds

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