ONE-DIMENSIONAL FLOW CHARACTERISTICS OF GAS-POWDER 2 PHASE FLOW IN PACKED-BEDS

被引：27

作者：

SHIBATA, K ^{[1
]}

SHIMIZU, M ^{[1
]}

INABA, S ^{[1
]}

TAKAHASHI, R ^{[1
]}

YAGI, J ^{[1
]}

机构：

[1] TOHOKU UNIV,MINERAL DRESSING & MET RES INST,SENDAI,MIYAGI 980,JAPAN

来源：

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 1991年 / 77卷 / 02期

关键词：

IRONMAKING; BLAST FURNACE; PACKED BED; COLD MODEL EXPERIMENTS; GAS-POWDER 2 PHASE FLOW; MATHEMATICAL MODEL; BLOCKADE;

D O I：

10.2355/tetsutohagane1955.77.2_236

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Gas-powder two phase flow in packed beds were investigated by using a one-dimensional cold model and a mathematical model for clarifying the behavior of powders in a blast furnace. Following results were obtained; (1) Two phase flow showed higher pressure drop compared to clean gas flow. The increase in the pressure loss was mainly caused by the increase in the hold-up of powders in the region of low gas velocity and by the interaction force between powders and packed particles in the region of high gas velocity. (2) A mathematical model of gas-powder two phase flow in packed beds was developed considering an interaction force between gas and powders expressed by the drag force and the Richardson-Zaki's voidage function. (3) An interaction coefficient between powders and packed particles which was defined on the basis of the momentum balance equation of powders in packed beds was obtained from the experimental data. (4) Blockade occured at the certain gas velocity where the hydraulic diameter of packed bed including powders was below 6 times as long as powder diameter.

引用

页码：236 / 243

页数：8

共 6 条

[1]

ADEUMI MA, 1986, POWDER TECHNOL, V48, P67

[2] VERTICAL PNEUMATIC CONVEYING USING 4 HYDRODYNAMIC MODELS [J].

ARASTOOPOUR, H ;

GIDASPOW, D .

INDUSTRIAL & ENGINEERING CHEMISTRY FUNDAMENTALS, 1979, 18 (02) :123-130

[3] HOLD-UP OF FINE PARTICLES IN THE PACKED DENSE BED OF THE MULTISOLID PNEUMATIC TRANSPORT BED [J].

FAN, LS ;

TODA, M ;

SATIJA, S .

POWDER TECHNOLOGY, 1983, 36 (01) :107-114

[4] HOLDUP OF FINE PARTICLES IN THE FLUIDIZED DENSE BED OF THE MULTISOLID PNEUMATIC TRANSPORT BED [J].

KITANO, K ;

WISECARVER, KD ;

SATIJA, S ;

FAN, LS .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1988, 27 (07) :1259-1264

[5]

Lightfoot E.N., 1960, TRANSPORT PHENOMENA, P199

[6]

Richardson J. F., 1954, TRANS INST CHEM ENG, V32, P35, DOI DOI 10.1016/S0263-8762(97)80006-8

← 1 →