Heat Transfer and Hydrodynamic Investigations of a Baffled Slurry Bubble Column  

作　　者：S. C. Saxena Z. D. Chen 

机构地区：[1]Department of Chemical Engineering, The University of Illinois at Chicago, Box 4348, Chicago, IL 60680, U.S.A.

出　　处：《Journal of Thermal Science》1992年第3期178-183,共6页热科学学报（英文版）

摘　　要：Heat transfer and hydrodynamic investigations have been conducted in a 0.108 m internal diameter bubble column at ambient conditions. The column is equipped with seven 19mm diameter tubes arranged in an equilateral triangular pitch of 36.5 mm. A Monsanto synthetic heat transfer fluid, Therminol-66 having a viscosity of 39.8 cP at 303 K, is used as a liquid medium. Magnetite powders, average diameters 27.7 and 36.6 μm, in five concentrations up to 50 weight percent in the slurry, are used. As a gas phase, industrial grade nitrogen of purity 99.6 percent is employed. Gas holdup in different operating modes and regimes have been measured for the two- and three-phase systems over a superficial gas velocity range up to 0.20 m/s in the semi-batch mode. Heat transfer coefficients are measured at different tube locations in the bundle at different radial and vertical locations over a range of operating conditions. All these data are compared with the existing literature correlations and models. New correlations are proposed.

关 键 词：heat transfer coefficient gas-phase holdup slurry bubble column. 

分 类 号：TK124[动力工程及工程热物理—工程热物理] O351.2[动力工程及工程热物理—热能工程]