CORRELATION FOR CALCULATION OF THE GAS DISPERSION COEFFICIENT IN CONICAL SPOUTED BEDS

被引：61

作者：

SANJOSE, MJ

OLAZAR, M

PENAS, FJ

ARANDES, JM

BILBAO, J

机构：

[1] Departamento de Ingeniería Química, Universidad del Pais Vasco, 48080 Bilbao

来源：

CHEMICAL ENGINEERING SCIENCE | 1995年 / 50卷 / 13期

关键词：

D O I：

10.1016/0009-2509(95)00079-K

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

On the basis of the experimental study of air velocity profiles in a pilot plant scale unit, the validity of the hypotheses of the gas flow model proposed for conical spouted beds, that is to say, flow rate conservation along each streamtube and plug flow in the spout zone, has been proven. A correlation has been obtained for calculation of the local velocity as a function of the contactor geometric factors (angle, inlet diameter) and of the operating conditions (solid density, particle size, relative air velocity). The validity of the gas flow model has been proven in a wide range of operating conditions and a correlation has been obtained for calculation of the dispersion coefficient as a function of the following moduli: bed upper diameter/contactor base diameter, Archimedes number, tangent of the angle, relative air velocity.

引用

页码：2161 / 2172

页数：12

共 25 条

[1]

Bilbao, Olazar, Romero, Arandes, Design and operation of a jet spouted bed reactor with continuous catalyst feed in the benzyl alcohol polymerization, Ind. Engng Chem. Res., 26, pp. 1297-1304, (1987)

[2]

Box, A new method of constrained optimization and a comparison with other methods, The Computer Journal, 1, pp. 42-52, (1965)

[3]

Condoret, Riba, Angelino, Dispersion in particulate beds with pulse injection, The Canadian Journal of Chemical Engineering, 67, pp. 45-50, (1989)

[4]

Dry, White, Gas residence-time characteristics in a high-velocity circulating fluidized bed of FCC catalyst, Powder Technol., 58, pp. 17-23, (1989)

[5]

Epstein, Introduction and overview, The Canadian Journal of Chemical Engineering, 70, pp. 833-834, (1991)

[6]

Gunn, Pryce, Dispersion in packed beds, Trans. Instn Chem. Engrs, 47, pp. 341-350, (1969)

[7]

Jovanovic, Catipovic, Fitzgerald, Levenspiel, The mixing of tracer gas in fluidized beds of large particles, Fluidization, pp. 325-332, (1980)

[8]

Kunii, Levenspiel, Fluidization Engineering, pp. 237-242, (1991)

[9]

Lim, Mathur, A flow model for gas movement in spouted beds, A.I.Ch.E. J., 22, pp. 674-680, (1976)

[10]

Nishio, Kaguei, Wakao, Parameters in a gas-solid fluidized bed absorber by concentration response-technique at incipient fluidization, Int. Chem. Engng, 32, pp. 132-139, (1992)

← 1 2 3 →