Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model

T. Kimura, K. Horiuchi, T. Watanabe, Masahiko Matsukata, T. Kojima

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The local behavior of gas and solids in a grid zone was investigated using a jetting fluidized bed cold model. Spherical alumina particles (440 μm, 1500 kg/m3) were used as bed material. A pair of optical fiber sensors, an A D converter and a personal computer were used to measure particle velocity in the jet, jet diameter and jet height. Tracer gas introduced from a center nozzle was sampled from various points in the grid zone and its concentration was measured by gas chromatography to investigate gas interchange between the jet and the annulus, and the gas dispersion in the annulus region. The effects of operational conditions, i.e., the shape of the gas distributor, nozzle diameter and gas flow rates, on the gas and particle behavior are discussed. It was considered that many more particles entered into the jet when a cone-shaped distributor rather than a flat distributor was employed. Employment of a narrower nozzle caused an increase in particle velocity at the bottom of the bed.

Original languageEnglish
Pages (from-to)135-143
Number of pages9
JournalPowder Technology
Volume82
Issue number2
DOIs
Publication statusPublished - 1995
Externally publishedYes

Fingerprint

Fluidized beds
beds
Gases
grids
distributors
gases
nozzles
Nozzles
annuli
Aluminum Oxide
personal computers
Fiber optic sensors
Interchanges
gas chromatography
Personal computers
Gas chromatography
tracers
converters
gas flow
Flow of gases

Keywords

  • Fluidized bed
  • Gas concentration profile
  • Grid zone
  • Jet height
  • Model
  • Optical fiber sensor
  • Particle velocity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model. / Kimura, T.; Horiuchi, K.; Watanabe, T.; Matsukata, Masahiko; Kojima, T.

In: Powder Technology, Vol. 82, No. 2, 1995, p. 135-143.

Research output: Contribution to journalArticle

Kimura, T. ; Horiuchi, K. ; Watanabe, T. ; Matsukata, Masahiko ; Kojima, T. / Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model. In: Powder Technology. 1995 ; Vol. 82, No. 2. pp. 135-143.
@article{1bf3c2c7a6eb4b16996d8450f29086ee,
title = "Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model",
abstract = "The local behavior of gas and solids in a grid zone was investigated using a jetting fluidized bed cold model. Spherical alumina particles (440 μm, 1500 kg/m3) were used as bed material. A pair of optical fiber sensors, an A D converter and a personal computer were used to measure particle velocity in the jet, jet diameter and jet height. Tracer gas introduced from a center nozzle was sampled from various points in the grid zone and its concentration was measured by gas chromatography to investigate gas interchange between the jet and the annulus, and the gas dispersion in the annulus region. The effects of operational conditions, i.e., the shape of the gas distributor, nozzle diameter and gas flow rates, on the gas and particle behavior are discussed. It was considered that many more particles entered into the jet when a cone-shaped distributor rather than a flat distributor was employed. Employment of a narrower nozzle caused an increase in particle velocity at the bottom of the bed.",
keywords = "Fluidized bed, Gas concentration profile, Grid zone, Jet height, Model, Optical fiber sensor, Particle velocity",
author = "T. Kimura and K. Horiuchi and T. Watanabe and Masahiko Matsukata and T. Kojima",
year = "1995",
doi = "10.1016/0032-5910(94)02913-9",
language = "English",
volume = "82",
pages = "135--143",
journal = "Powder Technology",
issn = "0032-5910",
publisher = "Elsevier",
number = "2",

}

TY - JOUR

T1 - Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model

AU - Kimura, T.

AU - Horiuchi, K.

AU - Watanabe, T.

AU - Matsukata, Masahiko

AU - Kojima, T.

PY - 1995

Y1 - 1995

N2 - The local behavior of gas and solids in a grid zone was investigated using a jetting fluidized bed cold model. Spherical alumina particles (440 μm, 1500 kg/m3) were used as bed material. A pair of optical fiber sensors, an A D converter and a personal computer were used to measure particle velocity in the jet, jet diameter and jet height. Tracer gas introduced from a center nozzle was sampled from various points in the grid zone and its concentration was measured by gas chromatography to investigate gas interchange between the jet and the annulus, and the gas dispersion in the annulus region. The effects of operational conditions, i.e., the shape of the gas distributor, nozzle diameter and gas flow rates, on the gas and particle behavior are discussed. It was considered that many more particles entered into the jet when a cone-shaped distributor rather than a flat distributor was employed. Employment of a narrower nozzle caused an increase in particle velocity at the bottom of the bed.

AB - The local behavior of gas and solids in a grid zone was investigated using a jetting fluidized bed cold model. Spherical alumina particles (440 μm, 1500 kg/m3) were used as bed material. A pair of optical fiber sensors, an A D converter and a personal computer were used to measure particle velocity in the jet, jet diameter and jet height. Tracer gas introduced from a center nozzle was sampled from various points in the grid zone and its concentration was measured by gas chromatography to investigate gas interchange between the jet and the annulus, and the gas dispersion in the annulus region. The effects of operational conditions, i.e., the shape of the gas distributor, nozzle diameter and gas flow rates, on the gas and particle behavior are discussed. It was considered that many more particles entered into the jet when a cone-shaped distributor rather than a flat distributor was employed. Employment of a narrower nozzle caused an increase in particle velocity at the bottom of the bed.

KW - Fluidized bed

KW - Gas concentration profile

KW - Grid zone

KW - Jet height

KW - Model

KW - Optical fiber sensor

KW - Particle velocity

UR - http://www.scopus.com/inward/record.url?scp=0029158423&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029158423&partnerID=8YFLogxK

U2 - 10.1016/0032-5910(94)02913-9

DO - 10.1016/0032-5910(94)02913-9

M3 - Article

AN - SCOPUS:0029158423

VL - 82

SP - 135

EP - 143

JO - Powder Technology

JF - Powder Technology

SN - 0032-5910

IS - 2

ER -