Predicting Bed Voidage in Solid-Liquid Fluidization

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Akira Hirata¹  Fredric B. Bulos¹ 

[1] Department of Chemical Engineering, Waseda University

关键词: Fluidization;    Bed Voidage;    Empirical Correlation;    Solid–Liquid Systems;   

DOI  :  10.1252/jcej.23.599

来源: Maruzen Company Ltd

【 摘 要 】

References(23)Cited-By(19)Previously published solid-liquid fluidization data and new experimental data were correlated to develop an explicit expression for bed voidage, ε, in solid–liquid systems. Based on the observed deviation between the voidage predicted by the Richardson–Zaki18) equation (εRZ) and the actual voidage, this new correlation assumes the formε = εPK + (1 – εPK)εRZA exp(B(1 – εRZ)where A = 2.2n + 8dP/D and B = 2.1n. εPK is the “packed” bed or the static bed voidage (i.e., ε when the superficial liquid veIocity, UL, is zero), n is the Richardson–Zaki18) exponent, and dP/D is the particle diameter-to-column diameter ratio. A total of 811 data points were correlated with Reynolds numbers based on terminal velocity, Ret, ranging from 0.7 to 3200. The correlation satisfactorily predicts voidage with a standard deviation of less than 5%.

【 授权许可】

Unknown