SIMULATION OF STEADY-STATE HEAT AND MASS-TRANSFER IN A ROTARY KILN INCINERATOR

被引:12
作者
CHEN, KS
TU, JT
CHANG, YR
机构
[1] Inst. of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung
来源
HAZARDOUS WASTE & HAZARDOUS MATERIALS | 1993年 / 10卷 / 04期
关键词
D O I
10.1089/hwm.1993.10.397
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Simulation is presented for steady-state heat and mass transfer in the combustion chamber of a rotary kiln. The gas-phase region in the chamber is divided into 3x8x4 computational volumes in r-, theta-, and z-coordinates, respectively. Conservations of mass and energy are formulated in each volume, in which convection and radiation transfers coupled with energy balance and volatilization of waste bed are considered with plug flow model. The volatilization rate of wastes is considered by using the volatilization model for a mixture of cellulose and toluene. The governing equations for all computation cells together with the boundary and auxiliary conditions constitute a nonlinear system of equations and are solved numerically. Effects of percentage excess air, rotation speed and inclination angle of the kiln at a fixed waste loading level are examined and discussed. Comparisons between two waste volatilization models are also made.
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页码:397 / 411
页数:15
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