Abstract: The desulfurization of simulated flue gas was investigated in a co-current rotating packed bed with sodium phosphate buffer solution as the absorbent. The effects of process parameters，such as liquid to gas ratio (L/G)，high gravity factor (β)，phosphate concentration (CL) and initial pH value of the absorbent，mass concentration of SO2 in inlet simulated flue gas (Cin) on sulfur dioxide removal efficiency (η) and gas-phase overall volumetric mass transfer coefficients (KGa) were investigated in this study，and significant analysis on the process parameters were also investigated using Matlab software. The results indicated that the η and KGa?increased with the increasing of L/G，CL，β and pH value，the L/G and CL had the most significant influence on the η and KGa，but the CL had the least influence. The η can exceed 99% and concentration of SO2 in outlet gas was lower than 100mg/m3 when L/G，β，CL，pH value，and Cin were at (2.3—3) L/m3，80—110，1.5mol/L，5.5—6，(0.8-—12)g/m3，respectively. The process can realize the emission standards and showed a potential industrial application because of the advantages of higher desulfurization efficiency，lower liquid-gas ratio，lower energy consumption，smaller volume of the equipment and wide application range.

Key words: sulfur dioxide, phosphate, rotating packed bed, absorption

摘要： 以磷酸钠溶液为吸收剂，采用并流旋转填料床进行了模拟烟气脱硫实验研究。分别考察了液气比L/G、超重力因子β、入口SO2质量浓度Cin、磷酸浓度CL和初始pH值等工艺参数对脱硫率η和气相总体积传质系数KGa的影响规律，并采用Matlab软件分析了工艺参数对η和KGa影响的显著性。结果表明：η和KGa随L/G、CL、β和pH值的增加而升高，其中L/G和CL影响最为显著，而Cin影响最小。在L/G为（2.3～3）L/m3，β为80～110，CL为1.5mol/L左右，pH=5.5～6，Cin=（0.8～12）g/m3的条件下，脱硫率达99%以上，SO2出口质量浓度低于100mg/m3。表明该工艺具有脱硫效率高、液气比小、节能降耗、设备体积小、适用范围宽等特点，可实现达标治理，具有良好的工业应用前景。

关键词: 二氧化硫, 磷酸, 旋转填料床, 吸收