Transient Accumulation Behavior of Fines in Packed Beds of Pulverized Coke Particles

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Nobuyuki Hidaka²  Katsuki Kusakabe¹  Toshitatsu Matsumoto²  Shigeharu Morooka¹ 

[1] Department of Material Physics and Chemistry, Graduate School of Engineering, Kyushu University;Department of Applied Chemistry and Chemical Engineering, Kagoshima University

关键词: Blast Furnace;    Packed Bed;    Gas-Solid Flow;    Transient Discharge;    Holdup;   

DOI  :  10.1252/jcej.33.152

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(9)Vertical columns 1- and 2-m in height were packed with coarse coke particles, and were used as the cold model for a blast furnace. In order to estimate the transient accumulation behavior of fines from the gas phase to the surfaces of the packings, a mixture of gas and fines was injected into the bottom of each packed bed, and the transient discharge rate of fines at the outlet of the column was determined. Fines used in the present experiment were sieved coke particles 75-, 125-, 210- and 375-μm in diameter. The time required to attain a constant discharge rate decreases with increasing feed rate of fines and gas velocity, but is not greatly affected by the diameter of fines. A mathematical model for the transient discharge rate of fines was proposed assuming a transportation rate of fines to the packing surfaces from the upward stream, and that to the upward stream from the packing surfaces. Values of these parameters are correlated with experimental variables.

【 授权许可】

Unknown