尚灵祎,吴峰,马晓迅

• 1:西北大学化工学院
• 2:陕西省洁净煤转化工程技术中心

摘要(Abstract)：

将球体纵向涡流发生器引入喷动床内,采用粒子图像测速技术研究了在内径152 mm的喷动床内颗粒密度及纵向涡流发生器排数(单排、双排及三排)对喷动床内喷射区及环隙区颗粒相径向速度的影响。结果表明:在喷动床稳定喷动范围内,颗粒密度越小纵向涡流对颗粒相径向运动的强化效果越佳。纵向涡发生器对喷动床内颗粒运动强化存在空间分布的不均匀性,在喷动床有限的空间范围内,存在最佳的静床层高度使得纵向涡流发生器对颗粒径向运动的强化效果达到最佳。整体而言,单排及双排纵向涡流发生器对喷动床内颗粒径向速度的强化效果最佳,随着静床层高度的增加,多排纵向涡流发生器对喷射区颗粒径向速度影响逐渐减小,而对环隙区颗粒径向速度的影响逐渐增大。

关键词(KeyWords)： 喷动床;粒子图像测速技术;纵向涡流发生器排数;实验研究

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21476181);; 中国博士后科学基金第8批特别资助项目(2015T81048);; 第54批中国博士后面上一等基金资助项目(2013M540768)

作者(Author): 尚灵祎,吴峰,马晓迅

参考文献(References)：

• [1]Mathur K B,Epstein N.Developments in spouted bed technology[J].Canadian Journal of Chemical Engineering,2010,52(2):129-144.
• [2]MA Rui-jin(马瑞进),LIU Tao(刘涛),YUN Dong(郧栋),et al.Research and application of spray drying bed technology(喷动干燥床技术研究及应用)[J].Drying Technology and Equipment(干燥技术与设备),2011,9(6):304-307.
• [3]Pallai-Varsányi E,Tóth J,Gyenis J.Drying of suspensions and solutions on inert particle surface in mechanically spouted bed dryer[J].Particuology,2007,5(5):337-344.
• [4]Ali N,Al-Juwaya T,Al-Dahhan M.An advanced evaluation of spouted beds scale-up for coating TRISO nuclear fuel particles using radioactive particle tracking(RPT)[J].Experimental Thermal&Fluid Science,2016,80(8):90-104.
• [5]Martins G Z,Souza C R F,Shankar T J,et al.Effect of process variables on fluid dynamics and adhesion efficiency during spouted bed coating of hard gelatincapsules[J].Chemical Engineering&Processing,2008,47(12):2238-2246.
• [6]Szafran R G,Ludwig W,Kmiec A.New spout-fluid bed apparatus for electrostatic coating of fine particles and encapsulation[J].Powder Technology,2012,225(7):52-57.
• [7]Banerjee S,Agarwal R.Transient reacting flow simulation of spouted fluidized bed for coal-direct chemical looping combustion with different Fe-based oxygen carriers[J].Applied Energy,2015,160(2):552-560.
• [8]Erkiaga A,Lopez G,Amutio M,et al.Influence of operating conditions on the steam gasification of biomass in a conical spouted bed reactor[J].Chemical Engineering Journal,2014,237(2):259-267.
• [9]ZHANG Cui-xuan(张翠宣),YE Jing-sheng(叶京生),SONG Ji-tian(宋继天).Research and progress of spray bed(喷动床研究与进展)[J].Chemical Industry and Engineering Progress(化工进展),2002,21(9):630-634.
• [10]ZHANG Lei(张磊).Flow characteristics of fluidized bed and its granulation process simulation(喷动流化床流动特性及其造粒过程模拟)[D].Tianjin(天津):Tianjin University(天津大学),1996.
• [11]MA Lan(马兰).The fluidization behavior of superfine powder in the nozzle spray bed(超细粉在导向管喷动床中的流化行为)[D].Chengdu(成都):Sichuan University(四川大学),2002.
• [12]NIU Fang-ting(牛方婷),SHANG Ling-yi(尚灵祎),WU Feng(吴峰),et al.Study on the flow characteristics of the longitudinal vortex generator(纵向涡流发生器喷动床颗粒流动特性研究)[J].Chemical Engineering(化学工程),2017,45(9):39-44.
• [13]WU Feng(吴峰),MA Xiao-xun(马晓迅),BIAN Wen-juan(边文娟).A kind of guide and spray bed(一种导流器及喷动床):CN,204134608[P].2015-02-04.
• [14]Adrian R J.Particle image technique for experimental fluid mechanic[J].Annual Review of Fluid Mechanics.1991,23:261-304.
• [15]SUN He-quan(孙鹤泉),KANG Hai-gui(康海贵),LI Guang-wei(李广伟).The principle and application of particle image velocimetry(PIV的原理与应用)[J].Journal of Waterway and Harbour(水道港口),2002,23(1):42-43.
• [16]CHENG Yi(程易),WANG Tie-feng(王铁峰).Multiphase flow measurement technology and modeling method(多相流测量技术及模型化方法)[M].Beijing(北京):Chemical Industry Press(化学工业出版社),2016.