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并流旋转填料床中磷酸钠法脱除烟气中SO2

袁志国1,2,刘有智1,宋卫1,康小锋1,王涛1,彭博1   

  1. 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
  • 出版日期:2014-05-05 发布日期:2014-05-05

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

YUAN Zhiguo1,2,LIU Youzhi1,SONG Wei1,KANG Xiaofeng1,WANG Tao 1,PENG Bo1   

  1. 1Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering,North University of China,Taiyuan 030051,Shanxi,China;2College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,Shanxi,China
  • Online:2014-05-05 Published:2014-05-05

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

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

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