并流旋转填料床中磷酸钠法脱除烟气中SO_2  

Removal of sulfur dioxide from flue gas by sodium phosphate buffer solution in a co-current rotating packed bed

作　　者：袁志国[1,2] 刘有智[1] 宋卫[1] 康小锋 王涛[1] 彭博[1] 

机构地区：[1]中北大学超重力化工山西省重点实验室,山西太原030051 [2]太原理工大学化学化工学院,山西太原030024

出　　处：《化工进展》2014年第5期1327-1331,共5页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(21376229);山西省青年科技研究基金(2011021012);山西省科技攻关(20130321035-02)项目

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。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 theηand KGa increased with the increasing of L/G,CL,βand pH value,the L/G and CL had the most significant influence on theηand 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.

关 键 词：二氧化硫 磷酸 旋转填料床 吸收 

分 类 号：X701[环境科学与工程—环境工程]