聚苯硫醚(PPS)掺炭纤维协同飞灰脱除气态汞的实验研究  

Removal of mercury vapor by fly ash and C-doped polyphenylene sulfide(PPS) fiber

作　　者：陈博[1] 刁永发[1] 苏博[1] 王欢[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《环境科学学报》2011年第5期1056-1063,共8页Acta Scientiae Circumstantiae

基　　金：国家高技术研究发展计划项目(No 2008AA05Z305)~~

摘　　要：利用汞蒸气发生器产生的单质汞和烟气中的一些主要气体成分模拟烟气条件,在固定床实验系统上分别进行了燃煤飞灰、聚苯硫醚(PPS)掺炭纤维及燃煤飞灰和PPS掺炭纤维联合对燃煤烟气中Hg0的脱除实验研究.结果表明:燃煤飞灰和PPS掺炭纤维对Hg0的吸附是物理吸附和化学吸附的共同结果,它们各自的脱汞效率分别可达27%和65%左右;PPS掺炭纤维和飞灰的联合脱汞效率并不是二者单独脱汞效率的代数叠加,它分别受到吸附反应温度、入口汞浓度和烟气停留时间等因素的影响;吸附反应温度越高,燃煤飞灰和PPS掺炭纤维对Hg0的联合脱除效率越低;入口汞浓度的增加并不一定会提高脱除效率;烟气停留时间越大,越有利于Hg0的脱除.Simulated flue gas which contained elemental mercury was generated by a mercury vapor generator.Our experiments concentrated on removal of Hg0 from the flue gas in a laboratory-scale packed bed reactor system.The materials used were fly ash,C-doped PPS fibers and a combination of the two substances.The mercury removal efficiency was 27% by fly ash and 65% by C-doped PPS fibers.The mercury adsorption efficiency of the C-doped PPS fiber mixed with fly ash was not simply the sum of the two components together.The results indicate that the Hg0 adsorption occurs by a synergy of physical adsorption and chemical adsorption.Hg removal is a function of the reaction temperature,concentration,and flue gas flow rate and other factors.The higher the adsorption temperature,the lower the Hg0 removal efficiency for fly ash mixed with C-doped PPS fiber.A higher concentration of mercury at the inlet will not necessarily improve the removal efficiency,but a longer gas residence time is an important factor to increase Hg0 removal.

关 键 词：PPS掺炭纤维 飞灰 Hg0 联合脱除 

分 类 号：X701[环境科学与工程—环境工程]