高含硫气田水控制氧化脱硫模拟实验及去除动力学

Simultaneous Removal of Controlled Oxidation Desulfurization for High Sulfur Gasfield Water and Desulfurization Kinetics

李永涛 肖建英 王兵 刘光全 张颖 林奇 王丹

LI Yongtao XIAO JianyingWANG Bing LIU Guangquan ZHANG Ying LIN QiWANG Dan

以HS-为主要被氧化对象，以空气为氧化介质, 对高含硫气田水进行控制氧化使单质硫为主要产物，考察了不同工艺参数对硫去除效果的影响，并探讨了硫去除以及单质硫生成动力学过程。结果表明，合理控制氧化对象和反应条件，是基于单质硫回收为目标的含硫废水处理的一种有效手段，可避免高价态硫产生，最佳条件（水样pH稳定在7、高分子络合物催化剂C加量50 mg/L、空气流量150 L/h，）时除硫效率可达92.13％，单质硫的收率为16.45％；硫化物去除动力学过程可用一级动力学方程ln[S2-]= 6.186－0.019t 描述，相关系数R2为0.972，表观反应速率常数为0.317×10-3 s-1；单质硫生成过程动力学方程为[S] = 22.95 lnt+23.51，及时分离新生态硫以及抑制S2O32-产生是获取更高单质硫收率的必要手段。图5 表2 参13

For the purpose of sulfur recovery, the high sulfur gas-field water was treated by air catalytic oxidation with the oxidized object of HS-. Kinetics of sulfur removal, sulfur yield and the effects of different process parameters on removal had been studied． Results indicated that the production of high valence state sulfur could be avoided by controlling the oxidized object and reaction conditions reasonably. When the dosage of catalyst C (a polymer complex) was of 50 mg/L at the air flow rate of 150 L/h and at neutral condition a higher sulfur removal efficiency of 92.13% and preferable sulfur yield of 16.45% was obtained. The sulfide removal kinetics for the first-order kinetic equation could be described by ln[S2-]= 6.186-0.019t, the correlation coefficient was of 0.972, and the apparent reaction rate constant was of 0.317 × 10-3 s-1; the dynamics equations of elemental sulfur production process was as follows, [S] = 22.95 lnt+23.51, the timely separation of new ecological sulfur and the inhibition of S2O32- production could obtain higher yield of elemental sulfur.