Absorption-desorption of SO2 with sodium citrate method in a roating packed bed
旋转填料床/柠檬酸盐法吸收-解吸SO2

A method of flue gas desulfurization was applied with sodium citrate method in a roating packed bed. The effects of rotor speed, liquid gas ratio, initial concentration of citrate ions and initial pH value of the absorption solution on SO2 removal efficiency were investigated. The results showed that the optimum technological conditions of high graviry-sodium citrate method were as follows, rotor speed of 1 000 r/min, liquid gas ratio of 7 L/m3, initial citrate ions concentration of 1.5 mol/L, initial pH value of the absorption solution of 5.0, and SO2-removal efficiency could reach about 99%. The desorption process of SO2 in citrate solution under different conditions and factors were explored. Several important factors that may affect desorption efficiency of SO2 were examined individually using the modified steam stripping device, namely initial concentration of citrate ions, initial pH value of citrate solution, the concentration of SO2, flow rate of rich solution and water vapor flow. The principle rules of SO2 desorption were concluded and analyzed. The experimental results have proved the possibility in technique and showed a good application future for absorption-desorption of SO2 with sodium citrate method in a roating packed bed.