Please wait a minute...
浙江大学学报(工学版)
浙江大学学报(工学版)  2018, Vol. 52 Issue (4): 754-760    DOI: 10.3785/j.issn.1008-973X.2018.04.019
化学工程,能源与环境工程     
固定床鼓泡反应器的混合特性
吴美玲, 帅云, 黄正梁, 王靖岱, 蒋斌波, 阳永荣
浙江大学 化学工程与生物工程学院, 浙江省化工高效制造技术重点实验室, 浙江 杭州 310027
Mixing characteristics of fixed bed bubble reactor
WU Mei-ling, SHUAI Yun, HUANG Zheng-liang, WANG Jing-dai, JIANG Bin-bo, YANG Yong-rong
Zhejiang Provincial Laboratory of Advance Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
 全文: PDF(4023 KB)   HTML
摘要：

以空气-水为模拟介质，选用5种不同粒径的氧化铝球形载体作为填充颗粒，采用电解质示踪法考察在低气液比和微鼓泡条件下，操作条件和填料直径对固定床鼓泡反应器内停留时间分布以及返混程度的影响.研究发现，在实验条件下，平均气泡直径随着填料直径的增大先增大后减小；返混程度随着表观液速的增大而减小，随着表观气速的增大而增大，液速对返混程度的影响比气速显著；返混程度随着填料直径的增大先减小后增大.通过对多组实验数据的回归分析，提出Pe准数与气液两相雷诺数及填料直径的经验关联式，公式预测值与实验值的相对偏差在±20%以内.
Abstract:

Effects of operation conditions and packing-Al2O3-particle diameters on the residence time distribution and backmixing characteristics were analyzed in a fixed bed bubble reactor test rig with water and air as experimental media and five Al2O3-particles as the packing particles through the electrolyte tracer method under low gas-liquid ratios and microbubble conditions. Results indicated that under the experimental conditions, the mean bubble diameter increased first and then decreased with the particle diameter, the backmixing degree decreased with the liquid velocity and increased with the gas velocity, meanwhile the backmixing degree decreased first and then increased with the particle diameter. An empirical correlation between the Peclet number, gas and liquid Reynolds numbers and particle diameter was proposed through the regression analysis of experimental data. The relative deviation between the predicted values and the experimental values is within ±20%.
收稿日期: 2017-01-03
CLC:  TQ027  
基金资助:

国家自然科学基金资助项目（91434205，21406194）；国家杰出青年科学基金资助项目（21525627）；浙江省自然科学基金资助项目（LR14B060001）；高等学校博士学科点专项科研基金资助项目（20130101110063）.
通讯作者: 黄正梁,男,助理研究员.orcid.org/0000-0002-8457-6394.     E-mail: huangzhengl@zju.edu.cn
作者简介: 吴美玲(1992-),女,硕士生,从事多相流反应器的研究.orcid.org/0000-0002-7732-6370.E-mail:melg2127@163.com
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
作者相关文章　　

引用本文:

吴美玲, 帅云, 黄正梁, 王靖岱, 蒋斌波, 阳永荣. 固定床鼓泡反应器的混合特性[J]. 浙江大学学报(工学版), 2018, 52(4): 754-760.

WU Mei-ling, SHUAI Yun, HUANG Zheng-liang, WANG Jing-dai, JIANG Bin-bo, YANG Yong-rong. Mixing characteristics of fixed bed bubble reactor. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2018, 52(4): 754-760.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2018.04.019    或    http://www.zjujournals.com/eng/CN/Y2018/V52/I4/754

[1] MEDEROS F S, ELIZALDE I, ANCHEYTA J. Steady-state and dynamic reactor models for hydrotreatment of oil fractions:a review[J]. Catalysis Reviews, 2009, 51(4):485-607.
[2] DUDUKOVIC M P, LARACHI F, MILLS P L. Multiphase catalytic reactors:a perspective on current knowledge and future trends[J]. Catalysis Reviews, 2002, 44(1):123-246.
[3] VAN-GELDER K B, BORMAN P C, WEENINK R E, et al. Three-phase packed bed reactor with an evaporating solvent-Ⅱ. modelling of the reactor[J]. Chemical Engineering Science, 1990, 45(10):3171-3192.
[4] STVBER F, WILHELM A M, DELMAS H. Modelling of three phase catalytic upflow reactor:a significant chemical determination of liquid-solid and gas-liquid mass transfer coefficients[J]. Chemical Engineering Science, 1996, 51(10):2161-2167.
[5] NIRANJAN K, PANGARKAR V G. Gas holdup and mixing characteristics of packed bubble columns[J]. Chemical Engineering Journal, 1984, 29(2):101-111.
[6] CAMPOS J, CARVALHO J. A new experimental technique to study backmixing in packed bubble columns[J]. Chemical Engineering Science, 1992, 47(15):4063-4067.
[7] THANOS A M, GALTIER P A, PAPAYANNAKOS N G. Liquid flow non-idealities and hold-up in a pilot scale packed bed reactor with cocurrent gas-liquid upflow[J]. Chemical Engineering Science, 1996, 51(11):2709-2714.
[8] BAYRAKTAR E, MEHMETOGLU V. Back mixing and liquid hold-up in a cocurrent up-flow packed bed bioreactor[J]. Chemical Engineering Communications, 2001, 185(1):125-140.
[9] CASSANELLO M, MARTÍNEZ O, CUKIERMAN A L. Liquid hold-up and backmixing in cocurrent upflow three-phase fixed-bed reactors[J]. Chemical Engineering Science, 1998, 53(5):1015-1025.
[10] 杨雨清. 固定床鼓泡反应器的流体力学特性研究[D]. 上海:华东理工大学, 2010:41-44.
[11] BORDAS M L, CARTELLIER A, SÉCHET P, et al. Bubbly flow through fixed beds:microscale experiments in the dilute regime and modeling[J]. AIChE Journal, 2006, 52(11):3722-3743.
[12] GORDIYCHUK A, SVANERA M, BENINI S, et al. Size distribution and sauter mean diameter of micro bubbles for a venturi type bubble generator[J]. Experimental Thermal and Fluid Science, 2016, 70:51-60.
[13] SABER M, HUU T T, PHAM-HUU C, et al. Residence time distribution, axial liquid dispersion and dynamic-static liquid mass transfer in trickle flow reactor containing β-SiC open-cell foams[J]. Chemical Engineering Journal, 2012, 185:294-299.
[14] JO D, REVANKAR S T. Effect of coalescence and breakup on bubble size distributions in a two-dimensional packed bed[J]. Chemical Engineering Science, 2010, 65(14):4231-4238.
[15] JO D, REVANKAR S T. Investigation of bubble breakup and coalescence in a packed-bed reactor-Part 1:a comparative study of bubble breakup and coalescence models[J]. International Journal of Multiphase Flow, 2011, 37(9):995-1002.
[16] PELLICER J, GARCIA-MORALES V, HERNÁNDEZ M J. On the demonstration of the Young-Laplace equation in introductory physics courses[J]. Physics Education, 2000, 35(2):144-168.
[17] JO D, REVANKAR S T. Bubble mechanisms and characteristics at pore scale in a packed-bed reactor[J]. Chemical Engineering Science, 2009, 64(13):3179-3187.
[18] COLLINS J H P, SEDERMAN A J, GLADDEN L F, et al. Characterising gas behaviour during gas-liquid co-current up-flow in packed beds using magnetic resonance imaging[J]. Chemical Engineering Science, 2017, 157(10):2-14.
[19] BELFARES L, CASSANELLO M, GRANDJEAN B P A, et al. Liquid back-mixing in packed-bubble column reactors:a state-of-the-art correlation[J]. Catalysis Today, 2001, 64(3):321-332.
[20] SAROHA A K, KHERA R. Hydrodynamic study of fixed beds with cocurrent upflow and downflow[J]. Chemical Engineering and Processing:Process Intensification, 2006, 45(6):455-460.
[21] 吉敏, 杨钊, 娄晓军, 等. 上流式反应器中流体流动及返混特性研究[J]. 化学工程, 2015, 43(11):41-46. JI Min, YANG Zhao, LOU Xiao-jun, et al. Fluid flow and backmixing characteristics of up-flow reactor[J]. Chemical Eningeering, 2015, 43(11):41-46.
[22] THERNING P, RASMUSON A. Liquid dispersion and gas holdup in packed bubble columns at atmospheric pressure[J]. Chemical Engineering Journal, 2001, 81(1):69-81.
[23] HAMAMCI H, RYU D D. Performance of tapered column packed-bed bioreactor for ethanol production[J]. Biotechnology and Bioengineering, 1987, 29(8):994-1002.
[1] 冉绍辉, 周慎杰, 杨锋苓, 李勃. 错位Rushton桨气液分散特性和传质性能实验研究[J]. 浙江大学学报(工学版), 2017, 51(7): 1368-1373.