适用于液-液快速反应的三喷嘴IS-RPB微观混合性能研究Micromixing Efficiency of a Three Impinging Stream-Rotating Packed Bed for Liquid-Liquid Fast Mixing Reaction
张珺,刘有智,焦纬洲,祁贵生
摘要(Abstract):
采用碘化物-碘酸盐平行竞争反应体系对三喷嘴IS-RPB微观混合性能进行了研究,考察了超重力因子β、入口雷诺数Re_(in)、入口流速u_(in)、喷嘴间距d_1、d_2、体积流量VB等因素对离集指数X_S的影响,结果表明增大超重力因子、入口雷诺数、入口流速都有利于微观混合效果的改善,表现为X_S显著减小;X_S随着体积流量的增大显著减小,但是随着体积流量比的增大而增大;d_1<6 mm时,X_S随喷嘴间距d_1的增大而减小;d_1>6 mm,增大d_1使X_S增加;较小的喷嘴间距d_2有利于微观混合。对比研究表明三喷嘴IS-RPB离集指数约为0.006,为传统IS-RPB的1/2,三喷嘴IS的1/3,显示出了优越的微观混合性能。
关键词(KeyWords): 三喷嘴撞击流-旋转填料床;微观混合;离集指数;超重力因子
基金项目(Foundation): 国家自然科学基金(21376229);; 山西省研究生教育创新项目(2015BY44)
作者(Author): 张珺,刘有智,焦纬洲,祁贵生
参考文献(References):
- [1]Lap?ík J L,Fra?tik M,Lap?íkováB.Impinging jet study of the deposition of colloidal particles on modified polycarbonate and poly(ethylene terephthalate)surfaces[J].Int J Heat Mass Transfer,2012,55(5-6):1513-1518.
- [2]Valente I,Celaco E,Marchisio D L,et al.Nanoprecipitation in confined impinging jets mixers:production,characterization and scale-up of pegylated nanospheres and nanocapsules for pharmaceutical use[J].Chem Eng Sci,2012,77(1):217-227.
- [3]Kumar D V R,Prasad B L V,Kulkarni A A.Impinging jet micromixer for flow synthesis of nanocrystalline Mg O:role of mixing/impingement zone[J].I&EC Res,2013,52(49):17376-17382.
- [4]LI Xi(李希),CHEN Jian-feng(陈建峰),CHEN Gan-tang(陈甘棠).Micromixing-the state of the art(微观混和研究的现状)[J].Chem React Eng Technol(化学反应工程与工艺).1994,10(2):103-112.
- [5]Erni P,Elabbadi A.Free impinging jet microreactors:controlling reactive flows via surface tension and fluid viscoelasticity[J].Langmuir,2013,29(25):7812-7824.
- [6]Liu Z D,Lu Y C,Wang J W,et al.Mixing characterization and scaling-up analysis of asymmetrical T-shaped micromixer:experiment and CFD simulation[J].Chem Eng J,2012,181-182(1):597-606.
- [7]Bourne J R,Yu S Y.Investigation of micromixing in stirred tank reactors using parallel reactions[J].I&EC Res,1994,33(1):41-55.
- [8]Xia Q F,Zhong S.Liquid mixing enhanced by pulse width modulation in a Y-shaped jet configuration[J].Fluid Dynamics Res,2013,45(2):1-19.
- [9]LI You-feng(李友凤),YE Hong-qi(叶红齐),HE Xian-da(何显达),et al.Study on micromixing characteristics of impinging streams mixers(撞击流混合器微观混合性能的研究)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2012,26(1):49-55.
- [10]SUN Qian(孙倩),CHU Guang-wen(初广文),ZOU Hai-kui(邹海魁),et al.Micromixing efficiency of an impinging stream-helical tube reactor(撞击流-螺旋盘管反应器微观混合性能研究)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2012,26(4):558-562.
- [11]LIU You-zhi(刘有智),QI Gui-sheng(祁贵生),YANG Li-rui(杨利锐).Study on the mass transfer characteristics in impinging stream-rotating packed bed extractor(撞击流-旋转填料床萃取器传质性能研究)[J].Chem Ind and Eng Prog(化工进展),2003,22(10):1108-1111.
- [12]LIU You-zhi(刘有智).Research progress of high gravity technology of IS-RPB to intensify liquid-liquid contact(超重力撞击流-旋转填料床液-液接触过程强化技术的研究进展)[J].Chem Ind and Eng Prog(化工进展),2009,28(7):1101-1108.
- [13]YANG Kuang(杨旷),CHU Guang-wen(初广文),ZOU Hai-kui(邹海魁),et al.Micromxing efficiency in a side-tee mixer(Side-Tee混合器内微观混合行为研究)[J].Chem React Eng Technol(化学反应工程与工艺),2010,26(3):198-203.
- [14]WANG Qi-an(王琦安),WANG Jie-xin(王洁欣),YU Wen(余文),et al.An experimental study of the micromixing efficiency in microchannel reactors(微通道反应器微观混合效率的实验研究)[J].J of Beijing Univ of Chem Technol(Natural Science Edition)(北京化工大学学报(自然科学版)),2009,36(3):1-5.
- [15]Jiao W Z,Liu Y Z,Qi G S.A new impinging stream-rotating packed bed reactor for improvement of micromixing iodide and iodate[J].Chem Eng J,2010,157(1):168-173.
- [16]Johnson D A.Experimental and numerical examination of confined laminar opposed jets.Part I.Momentum imbalance[J].Heat Mass Transfer,2000,27(4):444-453.
- [17]Fronte C P,Sultan M A,Santos R J,et al.Flow imbalance and Reynolds number impact on mixing in confined impinging jets[J].Chem Eng J,2015,260:316-330.
- [18]Gao Z M,Han J,Xu Y D,et al.Particle image velocimetry(PIV)investigation of flow characteristics in confined impinging jet reactors[J].I&EC Res,2013,52(33):11779-11786.
- [19]LIU You-zhi(刘有智),JIAO Wei-zhou(焦纬洲),QI Gui-sheng(祁贵生),et al.Three impinging stream structure and three impinging stream-rotating packed bed(三喷嘴撞击流结构以及三喷嘴撞击流—旋转填料床装置):CN,104226203A[P].2014-12-24.
- [20]Fournier M C,Falk L,Villermaux J.A new parallel competing reaction system for assessing micromixing efficiency-experimental approach[J].Chem Eng Sci,1996,51(22):5053-5064.
- [21]Guichardon P,Falk L.Characterisation of micromixing efficiency by the iodide-iodate reaction system.Part I:experimental procedure[J].Chem Eng Sci,2000,55(19):4233-4243.
- [22]Shi X,Xiang Y,Wen L X,et al.CFD analysis of flow patterns and micromixing efficiency in a Y-Type microchannel reactor[J].I&EC Res,2012,51(43):13944-13952.
- [23]Schaer E,Guichardon P,Falk L,et al.Determination of local energy dissipation rates in impinging jets by a chemical reaction method[J].Chem Eng J,1999,72(2):125-138.