摘要
在对比天然气传统脱硫工艺的基础上,结合Bio-SR工艺特点,分析了该工艺应用于天然气脱硫净化的可行性。通过单因素实验考察了H2S标准混合气浓度、初始Fe3+浓度、喷淋量、空塔停留时间、pH及压力等因素对脱硫率的影响,初步确定了适宜的控制参数。实验结果表明,该工艺对气量大、低H2S质量浓度(<1.0g/m3)的天然气有快速高效的净化作用,出气达到管输天然气标准。
In the Bio SR desulfurization system, H2 S in the natural gas feed stream is oxidized by Fe^2 （SO4）a to form S and Fe^2＋ which is subsequently oxidized to Fe^3＋ by ferrous bacteria （T. F） at an acidic pH. Series of experi mental runs were conducted to determine the effects of the important process parameters on the desulfurization efficiency. The results showed that, when enough Fe2 （SO4）3 was present, the overall H2 S removal rate was controlled by the gas liquid mass transfer step and that the desulfurization efficiency increased with increasing system pressure, Fe2 （SO4）3 concentration （up to the chemical equivalent）, pH, empty bed contact time, and the flow rate of the scrubbing solution as well as a lower inlet gas Ha S concentration. The process is attractive for treating low H2 S （〈 1.0 g/ma ） feed streams to produce a pipeline grade of natural gas.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2007年第12期889-892,共4页
Environmental Pollution & Control
基金
常州市社会发展基金资助项目(NoCS2007904)
关键词
Bio—SR
氧化亚铁硫杆菌
脱硫率
控制参数
气液传质
Bio SR process Ferrous bacteria Desulfurization efficiency Operating parameters Gas-liquid mass transfer
