摘要
以修正二相数学模式来描述以制糖滤泥及添加剂吸收二氧化硫之流体化床。我们对床中之气体及固体进行质量均衡，结果设立了联立的常微分方程式并以数值方法解之。如此可解得不同时间时气体和固体的浓度分布和气泡相及乳化相中的转化率。最后可算出床的脱硫效率。计算结果显示当反应温度、床直径或床高增加时，脱硫效率增加。当气体流速或进口二氧化硫浓度降低时，脱硫效率亦会增加。粒子大小对脱硫效率的影响很小。
A modified two phase model was employed in this study to accurately describe the fluidizd bed for adsorption of SO2 in flue gas with sugar mill mud and additives. Mass balances on gas and solid in the bed were performed. Simultaneous ordinary differential equations were resultant and solved numericaly. Concentration distribution in gas and solid as well as conversions were found in the bubble phase and emulsion phase at different time stages. Finally, the desulfurization efficiency of the bed was calculated. Calculation results indicated that the desulfurization efficiency was increased by increasing the reaction temperature, bed diameter or bed height. The efficiency could also be increased by reducing the gas flow rate or entrance SO_2concentration. The effect of particle size on the desulfurization efficiency was found to be moderate.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
1996年第1期63-71,共9页
Chemical Reaction Engineering and Technology
关键词
制糖
滤泥
二氧化硫
流体化床
数学模拟
吸收
Sugar mill mud, Sulfur dioxide, Fluidized bed, Mathematical model
