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Mean ascending velocity of powder entrained by gas in a packed bed; Juten sonai ni okeru kiryu ni dohansareru funtai no heikin josho sokudo

Journal Article:

Abstract

For the purpose of clarifying the behavior of fine particles entrained by upward gas in the packed bed like in a blast furnace, the mean ascending velocity of powder in the packed bed was measured by the residence time distribution of the tracer powder. According the results, it was found that the measured velocity was lower than the values predicted by the successive collision model of fine particles. The difference is considered to be caused by the stagnant zone of fine particles on the packed materials, and this behavior was confirmed by the observation in the two dimensional experimental apparatus. Namely, the dynamic hold-up of powder in the packed bed was composed of the particles entrained by the upward gas and the stagnant particles on the packed material, and the latter part was successively renewed by the powder carried by gas. Then, on the basis of the above results, the relation between stagnant time and local ascending velocity were experimentally correlated with solid-gas loading ratio, and it was found that there exists a certain relation among them. The model proposed by these experiments enabled to calculate the mean ascending velocity of powder in the packed bed. 6 refs., 11 figs.,  More>>
Authors:
Ariyama, T; Sato, M; Asakawa, Y [1] 
  1. NKK Corp., Tokyo (Japan)
Publication Date:
Jan 20, 1996
Product Type:
Journal Article
Reference Number:
SCA: 420400; 320303; PA: NEDO-96:910505; EDB-96:080874; SN: 96001590853
Resource Relation:
Journal Name: Kagaku Kogaku Ronbunshu; Journal Volume: 22; Journal Issue: 1; Other Information: PBD: 20 Jan 1996
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PACKED BEDS; POWDERS; GAS FLOW; ENTRAINMENT; VELOCITY; UPWELLING; BLAST FURNACES; SOLIDS; TRACER TECHNIQUES; TIME DEPENDENCE; FLOW MODELS; CONFIGURATION INTERACTION; RETENTION; STAGNATION; INTERCHANGEABILITY; CONCENTRATION RATIO; CHEMICAL ENGINEERING
OSTI ID:
227239
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: KKRBAW; ISSN 0386-216X; TRN: 96:910505
Submitting Site:
NEDO
Size:
pp. 171-176
Announcement Date:

Journal Article:

Citation Formats

Ariyama, T, Sato, M, and Asakawa, Y. Mean ascending velocity of powder entrained by gas in a packed bed; Juten sonai ni okeru kiryu ni dohansareru funtai no heikin josho sokudo. Japan: N. p., 1996. Web.
Ariyama, T, Sato, M, & Asakawa, Y. Mean ascending velocity of powder entrained by gas in a packed bed; Juten sonai ni okeru kiryu ni dohansareru funtai no heikin josho sokudo. Japan.
Ariyama, T, Sato, M, and Asakawa, Y. 1996. "Mean ascending velocity of powder entrained by gas in a packed bed; Juten sonai ni okeru kiryu ni dohansareru funtai no heikin josho sokudo." Japan.
@misc{etde_227239,
title = {Mean ascending velocity of powder entrained by gas in a packed bed; Juten sonai ni okeru kiryu ni dohansareru funtai no heikin josho sokudo}
author = {Ariyama, T, Sato, M, and Asakawa, Y}
abstractNote = {For the purpose of clarifying the behavior of fine particles entrained by upward gas in the packed bed like in a blast furnace, the mean ascending velocity of powder in the packed bed was measured by the residence time distribution of the tracer powder. According the results, it was found that the measured velocity was lower than the values predicted by the successive collision model of fine particles. The difference is considered to be caused by the stagnant zone of fine particles on the packed materials, and this behavior was confirmed by the observation in the two dimensional experimental apparatus. Namely, the dynamic hold-up of powder in the packed bed was composed of the particles entrained by the upward gas and the stagnant particles on the packed material, and the latter part was successively renewed by the powder carried by gas. Then, on the basis of the above results, the relation between stagnant time and local ascending velocity were experimentally correlated with solid-gas loading ratio, and it was found that there exists a certain relation among them. The model proposed by these experiments enabled to calculate the mean ascending velocity of powder in the packed bed. 6 refs., 11 figs., 1 tab.}
journal = {Kagaku Kogaku Ronbunshu}
issue = {1}
volume = {22}
journal type = {AC}
place = {Japan}
year = {1996}
month = {Jan}
}