多孔板鼓泡塔流动与传质特性数值模拟

doi:10.11949/0438-1157.20231331

摘要/Abstract

摘要：

采用Euler-Euler双流体模型对安装不同数量的水平多孔板的鼓泡塔内气液两相流动及传质特性进行数值模拟研究，并探究了不同表观气速条件对鼓泡塔内气含率、气泡直径分布和气液传质系数的影响。结果表明，不同数量的多孔板和不同位置的多孔板都会影响气含率的分布；随着多孔板的数目增加，鼓泡塔液相上方区域的气含率增加，但影响区域有限；安装多孔板后，鼓泡塔内径向位置的平均气含率变化明显，出现“M”形状的分布。不同表观气速下，未安装多孔板的鼓泡塔内直径为1~2 mm的微小气泡占比超过30%；安装多孔板后，微小气泡占比明显增加；气液传质系数在中心区域(径向无量纲为-0.5~0.5)较为平缓，波动不大。最后将模拟计算得到的气液体积传质系数与Akita的关联式计算值进行比较，本文计算结果略高。

关键词: 鼓泡塔, CFD-PBM模型, 气泡直径, 气含率, 气液体积传质系数

Abstract:

A numerical simulation investigation was performed on the gas-liquid two-phase flow and gas-liquid mass transfer characteristics within a bubbling column reactor with various numbers of horizontally placed porous plates using the Euler-Euler dual-fluid model. Furthermore, the research investigated the impact of horizontal porous plates situated at different positions and various superficial gas velocities on gas holdup, bubble diameter, and gas-liquid mass transfer coefficient in the bubbling column reactor. The results indicate that the distribution of gas holdup was affected by the quantity and location of the porous plates. As the number of porous plates increased, the gas holdup in the upper part of the liquid phase of the bubbling column reactor increased; after installing the porous plate, the average gas holdup at the inner diameter of the reactor changed significantly, resulting in an M-shaped distribution; at various superficial gas velocities, the proportion of small bubbles with a diameter of 1—2 mm accounted for over 30% in the bubbling column reactor without the installation of a porous plate. Conversely, the proportion of small bubbles increased significantly after the installation of a porous plate. The gas-liquid mass transfer coefficient is relatively gentle in the central area (radial dimensionless between -0.5 and 0.5), with little fluctuation. Finally, the volume mass transfer coefficient obtained from the simulation calculation was compared with the calculated value of Akita’s correlation equation. The calculation result was slightly higher.

Key words: bubbling column reactor, CFD-PBM model, bubble diameter, gas holdup, gas-liquid volumetric mass transfer coefficient

中图分类号:

TQ 052.4

王娟, 李秀明, 邵炜涛, 丁续, 霍莹, 付连超, 白云宇, 李迪. 多孔板鼓泡塔流动与传质特性数值模拟[J]. 化工学报, 2024, 75(3): 801-814.

Juan WANG, Xiuming LI, Weitao SHAO, Xu DING, Ying HUO, Lianchao FU, Yunyu BAI, Di LI. Numerical simulation of flow and mass transfer characteristics in porous plate bubbling column reactor[J]. CIESC Journal, 2024, 75(3): 801-814.

图/表 18

图1 鼓泡塔CFD-PBM耦合模型计算流程图

Fig.1 Calculation flow chart of gas-liquid mass transfer CFD-PBM coupling model

图2 鼓泡塔三维结构与网格划分

Fig.2 Three-dimensional structure and grid structure of bubbling columns reactor

表1 模型建立数据汇总

Table 1 Model establishment data summary

Parameter	Value
D/mm	149
H/mm	1616
H₁/mm	160
H₂/mm	420
H₃/mm	680
H₄/mm	940
H₅/mm	1130
H₆/mm	8

图3 安装不同数量多孔板的鼓泡塔三维结构

Fig.3 Three-dimensional structure of bubbling column reactors with different numbers of porous plates installed

图4 不同数量网格下不同截面平均气含率

Fig.4 Average gas holdup of different sections under different number of grids

图5 H/D=4截面气含率模拟结果与实验结果对比

Fig.5 Comparison between simulated and experimental results of gas holdup at H/D=4 cross-section

表2 氧气与水的物性参数

Table 2 Physical parameters of oxygen and water

Object	Density/(kg/m³)	Viscosity/(Pa·s)
water	1000	0.00178
oxygen	1.492	0.000019

图6 安装不同数量多孔板的鼓泡塔纵截面气含率分布

Fig.6 Distribution of gas holdup in longitudinal section of perforated plates bubbling column reactors with different numbers

图7 安装不同数量多孔板鼓泡塔平均气含率沿径向分布

Fig.7 Radial distribution of average gas holdup in porous plates bubbling column reactors with different numbers installed

图8 安装不同数量多孔板鼓泡塔内液相流线

Fig.8 Liquid phase flow lines in porous plates bubbling column reactors with different numbers installed

图9 不同表观气速下安装4块多孔板的鼓泡塔内气泡尺寸分布情况

Fig.9 Bubble size distribution in four porous plates bubbling column reactors installed at different superficial gas velocities

图10 不同表观气速和安装不同数量多孔板的鼓泡塔内气泡直径概率密度分布

Fig.10 Probability density distribution of bubble diameter in bubbling column reactors with different superficial gas velocities and different number of perforated plates

图11 表观气速0.25 m/s时不同向多孔板数量下鼓泡塔内平均气泡直径概率径分布

Fig.11 Probability radial distribution function of average bubble diameter in the bubbling column reactors with different number of perforated plates at the superficial gas velocity of 0.25 m/s

图12 不同径向位置和表观气体速度下的气泡大小概率密度分布

Fig.12 Probability density distribution of bubble size at different radial positions and superficial gas velocities

图13 ug=0.25 m/s时安装不同位置的多孔板鼓泡塔内气泡直径分布情况

Fig.13 Distribution of bubble diameter in porous plates bubbling column reactors installed at different positions at ug=0.25 m/s

图14 不同表观气速与安装不同数量多孔板下鼓泡塔内H/D=4截面处气液界面面积

Fig.14 The gas-liquid interface area at the H/D=4 cross-section in the bubbling column reactor under different superficial gas velocities and installation of different numbers of porous plates

图15 不同表观气速与安装不同数量多孔板下鼓泡塔内平均气液传质系数径向分布

Fig.15 Radial distribution function of average gas-liquid mass transfer coefficient in bubbling column reactors with different superficial gas velocities and different number of perforated plates

图16 气液体积传质系数随表观气速变化分布

Fig.16 Distribution of gas-liquid volumetric mass transfer coefficient with superficial gas velocity

参考文献 37

1	Mohammadzade Fard S, Farsi M, Rahimpour M R. Optimization of ethylene dimerization in a bubble column reactor based on coupling kinetic and equilibrium models[J]. Chemical Engineering Research and Design, 2021, 174: 357-364.
2	Muharam Y, Putri A D. Simulation of hydrotreating of vegetable oil in a slurry bubble column reactor for green diesel production[J]. International Journal of Technology, 2018, 9(6): 1168.
3	Shaikh A, Al-Dahhan M. Scale-up of bubble column reactors: a review of current state-of-the-art[J]. Industrial & Engineering Chemistry Research, 2013, 52(24): 8091-8108.
4	李光, 杨晓钢, 戴干策. 鼓泡塔反应器气液两相流CFD数值模拟[J]. 化工学报, 2008, 59(8): 1958-1965.
	Li G, Yang X G, Dai G C. CFD simulation of gas-liquid flow in bubble column[J]. Journal of Chemical Industry and Engineering (China), 2008, 59(8): 1958-1965.
5	薄守石, 武俊庭, 孙兰义. 流体物性对悬浮床加氢环流反应器的影响[J]. 石油炼制与化工, 2013, 44(8): 59-62.
	Bo S S, Wu J T, Sun L Y. Numerical simulation of effect of physical properties on loop reactor of slurry bed[J]. Petroleum Processing and Petrochemicals, 2013, 44(8): 59-62.
6	Chen P, Duduković M P, Sanyal J. Three-dimensional simulation of bubble column flows with bubble coalescence and breakup[J]. AIChE Journal, 2005, 51(3): 696-712.
7	van Baten J M, Krishna R. Eulerian simulation strategy for scaling up a bubble column slurry reactor for Fischer-Tropsch synthesis[J]. Industrial & Engineering Chemistry Research, 2004, 43(16): 4483-4493.
8	Möller F, Lau Y M, Seiler T, et al. A study on the influence of the tube layout on sub-channel hydrodynamics in a bubble column with internals[J]. Chemical Engineering Science, 2018, 179: 265-283.
9	Jhawar A K, Prakash A. Bubble column with internals: effects on hydrodynamics and local heat transfer[J]. Chemical Engineering Research and Design, 2014, 92(1): 25-33.
10	Besagni G, Inzoli F. Influence of internals on counter-current bubble column hydrodynamics: holdup, flow regime transition and local flow properties[J]. Chemical Engineering Science, 2016, 145: 162-180.
11	Huang Z L, Shuai Y, Ren C J, et al. Effects of internal structures on mass transfer performance of jet bubbling reactor[J]. Chemical Engineering and Processing - Process Intensification, 2022, 175: 108936.
12	Guo X F, Chen C X. Simulating the impacts of internals on gas-liquid hydrodynamics of bubble column[J]. Chemical Engineering Science, 2017, 174: 311-325.
13	Deshpande S S, Kar K, Pressler J, et al. Mass transfer estimation for bubble column scale up[J]. Chemical Engineering Science, 2019, 205: 350-357.
14	Zhang H H, Guo K Y, Wang Y L, et al. Numerical simulations of the effect of liquid viscosity on gas-liquid mass transfer of a bubble column with a CFD-PBM coupled model[J]. International Journal of Heat and Mass Transfer, 2020, 161: 120229.
15	Lau R, Peng W, Velazquez-Vargas L G, et al. Gas-liquid mass transfer in high-pressure bubble columns[J]. Industrial & Engineering Chemistry Research, 2004, 43(5): 1302-1311.
16	Bando Y, Chaya M, Hamano S I, et al. Effect of liquid height on flow characteristics in bubble column using highly viscous liquid[J]. Journal of Chemical Engineering of Japan, 2003, 36(5): 523-529.
17	Akita K, Yoshida F. Gas holdup and volumetric mass transfer coefficient in bubble columns. Effects of liquid properties[J]. Industrial & Engineering Chemistry Process Design and Development, 1973, 12(1): 76-80.
18	An M, Guan X P, Yang N, et al. Effects of internals on fluid dynamics and reactions in pilot-scale slurry bubble column reactors: a CFD study for Fischer-Tropsch synthesis[J]. Chemical Engineering and Processing - Process Intensification, 2018, 132: 194-207.
19	Xing C T, Wang T F, Wang J F. Experimental study and numerical simulation with a coupled CFD-PBM model of the effect of liquid viscosity in a bubble column[J]. Chemical Engineering Science, 2013, 95: 313-322.
20	Ramírez-Muñoz J, Gama-Goicochea A, Salinas-Rodríguez E. Drag force on interacting spherical bubbles rising in-line at large Reynolds number[J]. International Journal of Multiphase Flow, 2011, 37(8): 983-986.
21	Yan P, Jin H B, He G X, et al. CFD simulation of hydrodynamics in a high-pressure bubble column using three optimized drag models of bubble swarm[J]. Chemical Engineering Science, 2019, 199: 137-155.
22	Lane C D, Parisien V, Macchi A, et al. Investigation of bubble swarm drag at elevated pressure in a contaminated system[J]. Chemical Engineering Science, 2016, 152: 381-391.
23	Guan X P, Yang N. CFD simulation of pilot-scale bubble columns with internals: influence of interfacial forces[J]. Chemical Engineering Research and Design, 2017, 126: 109-122.
24	Chai X, Otic I, Cheng X. A new drag force model for the wake acceleration effect and its application to simulation of bubbly flow[J]. Progress in Nuclear Energy, 2015, 80: 24-36.
25	Roghair I, Lau Y M, Deen N G, et al. On the drag force of bubbles in bubble swarms at intermediate and high Reynolds numbers[J]. Chemical Engineering Science, 2011, 66(14): 3204-3211.
26	Roghair I, Van Sint Annaland M, Kuipers H J A M. Drag force and clustering in bubble swarms[J]. AIChE Journal, 2013, 59(5): 1791-1800.
27	Yang G Y, Guo K Y, Wang T F. Numerical simulation of the bubble column at elevated pressure with a CFD-PBM coupled model[J]. Chemical Engineering Science, 2017, 170: 251-262.
28	Tomiyama A, Kataoka I, Zun I, et al. Drag coefficients of single bubbles under normal and micro gravity conditions[J]. JSME International Journal Series B, 1998, 41(2): 472-479.
29	Kumar S, Ramkrishna D. On the solution of population balance equations by discrettization (1): A fixed pivot technique[J]. Chemical Engineering Science, 1996, 51(8): 1311-1332.
30	Luo H. Coalescence, breakup and liquid circulation in bubble column reactors[D]. Trondheim: The Norwegian Institute of Technology, 1993.
31	Luo H A, Svendsen H F. Theoretical model for drop and bubble breakup in turbulent dispersions[J]. AIChE Journal, 1996, 42(5): 1225-1233.
32	Smith P L, van Winkle M. Discharge cofficients through perforated plates at Reynolds numbers of 400 to 3000[J]. AIChE Journal, 1958, 4(3): 266-268.
33	谢明辉. 多层搅拌式生物反应器内溶液流变性质对流场特性影响的研究[D]. 上海: 华东理工大学, 2013.
	Xie M H. Study of the effect of the rheology properties on flow fields in stirred bioreactors with multiple impellers[D]. Shanghai: East China University of Science and Technology, 2013.
34	Ranganathan P, Sivaraman S. Investigations on hydrodynamics and mass transfer in gas-liquid stirred reactor using computational fluid dynamics[J]. Chemical Engineering Science, 2011, 66(14): 3108-3124.
35	Moraveji M K, Sajjadi B, Jafarkhani M, et al. Experimental investigation and CFD simulation of turbulence effect on hydrodynamic and mass transfer in a packed bed airlift internal loop reactor[J]. International Communications in Heat and Mass Transfer, 2011, 38(4): 518-524.
36	Kerdouss F, Bannari A, Proulx P, et al. Two-phase mass transfer coefficient prediction in stirred vessel with a CFD model[J]. Computers & Chemical Engineering, 2008, 32(8): 1943-1955.
37	贾翔飞, 钱嘉澍, 吴幼青, 等. 鼓泡塔反应器中两相流动CFD-PBM耦合数值模拟[J]. 华东理工大学学报(自然科学版), 2021, 47(1): 1-10.
	Jia X F, Qian J S, Wu Y Q, et al. CFD-PBM coupled numerical simulation of two phase flow in bubble column reactor[J]. Journal of East China University of Science and Technology, 2021, 47(1): 1-10.

编辑推荐 0

Metrics

阅读次数

全文

211

HTML			PDF

最新录用	在线预览	正式出版	最新录用	在线预览	正式出版
5	0	22	19	0	165

来源	本网站	其他网站

次数	128	83
比例	61%	39%

摘要

237

最新录用	在线预览	正式出版

40	0	197

来源	本网站	其他网站

次数	96	141
比例	41%	59%

[1]	韩东, 高宁宁, 唐新德, 龚升高, 夏良树. 适用欧拉-拉格朗日方法模拟气液泡状流的气泡破碎模型[J]. 化工学报, 2024, 75(2): 553-565.
[2]	崔怡洲, 李成祥, 翟霖晓, 刘束玉, 石孝刚, 高金森, 蓝兴英. 亚毫米气泡和常规尺寸气泡气液两相流流动与传质特性对比[J]. 化工学报, 2024, 75(1): 197-210.
[3]	李乃良, 陈聚凯, 韩骏楷, 赵庆杰, 张一帆. 静态及摇摆条件下弹状流壁面切应力实验研究[J]. 化工学报, 2023, 74(12): 4852-4862.
[4]	禹言芳, 刘桓辰, 孟辉波, 刘励图, 李毓, 吴剑华. Lightnin静态混合器内气泡分散流体动力学特性实验研究[J]. 化工学报, 2022, 73(8): 3565-3575.
[5]	王凯玥, 马永丽, 李琛, 刘明言. 气液固微型流化床的气液传质系数[J]. 化工学报, 2022, 73(8): 3529-3540.
[6]	张文龙,宁尚雷,靳海波,马磊,何广湘,杨索和,郭晓燕,张荣月. 鼓泡塔内空气-醋酸体系流体力学参数的CFD-PBM耦合模型数值模拟[J]. 化工学报, 2022, 73(6): 2589-2602.
[7]	施炜斌, 龙姗姗, 杨晓钢, 蔡心悦. 计及气泡诱导与剪切湍流的气泡破碎、湍流相间扩散及传质模型[J]. 化工学报, 2022, 73(6): 2573-2588.
[8]	姜佳彤, 胡斌, 王如竹, 刘华, 张治平, 李宏波. R1233zd（E）高温热泵用卧式冷凝器的换热动态模拟[J]. 化工学报, 2021, 72(S1): 98-105.
[9]	张文龙, 侯燕, 靳海波, 马磊, 何广湘, 杨索和, 郭晓燕, 张荣月. 加温加压下CFD-PBM耦合模型空气-水两相流数值模拟研究[J]. 化工学报, 2021, 72(9): 4594-4606.
[10]	赵雨萌, 王亦飞, 彭昕, 位宗瑶, 于广锁, 王辅臣. 洗涤冷却室垂直环隙空间内液相流动结构的研究[J]. 化工学报, 2021, 72(8): 4039-4046.
[11]	高颂,徐燕燕,李继香,叶爽,黄伟光. 基于TFM-PBM耦合模型的离心泵内微气泡破碎合并的模拟研究[J]. 化工学报, 2021, 72(10): 5082-5093.
[12]	杨光,王沫然. 共轴反转型生物反应器内流场数值模拟与性能分析[J]. 化工学报, 2020, 71(11): 5188-5199.
[13]	陈宏霞, 肖红洋, 孙源, 刘霖. 微柱表面液滴定壁温沸腾实验研究[J]. 化工学报, 2019, 70(9): 3363-3369.
[14]	张华海, 王铁峰. CFD-PBM耦合模型模拟气液鼓泡床的通用性研究[J]. 化工学报, 2019, 70(2): 487-495.
[15]	刘英杰, 祝京旭. 气泡驱动液固流化床内二元颗粒的流化行为[J]. 化工学报, 2019, 70(1): 91-98.