中文摘要：

以双膜理论和传热传质理论为基础，建立描述在流化床内磁场强化脱除SO2的数学模型，并进行模型计算和实验验证。得出如下结论：钙硫摩尔比和SO2入口浓度升高可以提高磁流化床脱硫效率；在弱磁场范围内，随着磁场的增强，脱硫反应速率和效率变大，模型计算值和试验结果吻合较好。通过模型计算分析了模型中几个主要物理参数对脱硫效率的影响。采用电镜扫描和比表面积分析（BET）等分析方法，从微观角度揭示磁场确实可以增强铁磁颗粒催化脱硫反应，进一步验证了该模型的正确性。采用该模型可以对实验结果进行预测，同时也为工程应用中的参数调整提供参考。

英文摘要：

Based on the double-film model, a model of the flue gas desulphurization in magnetically fluidized bed （FGD-MFB） was developed. After comparing the numeration values with the test results, the mechanism of FGD-MFB was analyzed and the relation of the key parameters and the desulphurization efficiency of the FGD-MFB was discussed not only by the experiment, but also by the means of brunauer emmett teller equation（BET） and field emission microscope （FEM）. The results show that the velocity and the efficiency of the FGD-MFB will increase with the separately increasing between the magnetic field intensity, the ratio of Ca and S the entrance concentration of SO2. There is an agreement between the numeration value and the test results, and so the numerical model can offer a pretesting result and a theory foundation of the FGD-MFB technology for engineering.