CFD simulation of solids residence time distribution in a multi-compartment fluidized bed

doi:10.1016/j.cjche.2017.02.010

Chin.J.Chem.Eng. ›› 2017, Vol. 25 ›› Issue (12): 1706-1713.DOI: 10.1016/j.cjche.2017.02.010

• Fluid Dynamics and Transport Phenomena • Previous Articles Next Articles

CFD simulation of solids residence time distribution in a multi-compartment fluidized bed

Zheng Zou¹, Yunlong Zhao^1,2, Hu Zhao^1,2, Libo Zhang^1,2, Zhaohui Xie¹, Hongzhong Li¹, Qingshan Zhu¹

1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-12-15 Revised:2017-02-21 Online:2018-01-18 Published:2017-12-28
Contact: Hongzhong Li,E-mail address:hzli@ipe.ac.cn.
Supported by:
Supported by the National Natural Science Foundation of China (21406237 and 21325628), and the State Key Development Program for Basic Research of China (2015CB251402).

CFD simulation of solids residence time distribution in a multi-compartment fluidized bed

Zheng Zou¹, Yunlong Zhao^1,2, Hu Zhao^1,2, Libo Zhang^1,2, Zhaohui Xie¹, Hongzhong Li¹, Qingshan Zhu¹

1. State Key Laboratory of Multi-phase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

通讯作者: Hongzhong Li,E-mail address:hzli@ipe.ac.cn.
基金资助:
Supported by the National Natural Science Foundation of China (21406237 and 21325628), and the State Key Development Program for Basic Research of China (2015CB251402).

Abstract

Abstract: The present work focuses on a numerical investigation of the solids residence time distribution (RTD) and the fluidized structure of a multi-compartment fluidized bed, in which the flow pattern is proved to be close to plug flow by using computational fluid dynamics (CFD) simulations. With the fluidizing gas velocity or the bed outlet height rising, the solids flow out of bed more quickly with a wider spread of residence time and a larger RTD variance (σ²). It is just the heterogeneous fluidized structure that beingmore prominentwith the bed height increasing induces the widely non-uniform RTD. The division of the individual internal circulation into double ones improves the flow pattern to be close to plug flow.

Key words: RTD, Bed geometry, CFD, Hydrodynamics, Fluidization

摘要： The present work focuses on a numerical investigation of the solids residence time distribution (RTD) and the fluidized structure of a multi-compartment fluidized bed, in which the flow pattern is proved to be close to plug flow by using computational fluid dynamics (CFD) simulations. With the fluidizing gas velocity or the bed outlet height rising, the solids flow out of bed more quickly with a wider spread of residence time and a larger RTD variance (σ²). It is just the heterogeneous fluidized structure that beingmore prominentwith the bed height increasing induces the widely non-uniform RTD. The division of the individual internal circulation into double ones improves the flow pattern to be close to plug flow.

关键词: RTD, Bed geometry, CFD, Hydrodynamics, Fluidization

Zheng Zou, Yunlong Zhao, Hu Zhao, Libo Zhang, Zhaohui Xie, Hongzhong Li, Qingshan Zhu. CFD simulation of solids residence time distribution in a multi-compartment fluidized bed[J]. Chin.J.Chem.Eng., 2017, 25(12): 1706-1713.

References

[1] S. Wang, B. Shao, R. Liu, J. Zhao, Y. Liu, S. Yang, Comparison of numerical simulations and experiments in conical gas-solid spouted bed, Chin. J. Chem. Eng. 23 (10) (2015) 1579-1586.

[2] W. Zhang, A review of techniques for the process intensification of fluidized bed reactors, Chin. J. Chem. Eng. 17 (4) (2009) 688-702.

[3] J. Zhang, J. Lu, X.Wang, H. Zhang, G. Yue, T. Suda, J. Sato, Characterization of pressure signals in fluidized beds loaded with large particles using wigner distribution analysis: Feasibility of diagnosis of agglomeration, Chin. J. Chem. Eng. 15 (1) (2007) 24-29.

[4] C.Wu, Y. Gao, Y. Cheng, L.Wang, X. Li, Solid concentration and velocity distributions in an annulus turbulent fluidized bed, Chin. J. Chem. Eng. 23 (7) (2015) 1077-1084.

[5] Z. Veran, J. Lutcha, Optimizing particle residence time in fluidized bed dryer, Chem. Eng. (1975) 678-681.

[6] J. Raghuraman, Y.B.G. Varma, An experimental investigation of the residence time distribution of solids in multistage fluidisation, Chem. Eng. Sci. 30 (1) (1975) 145-150.

[7] A.N. Chandran, S.S. Rao, Y.B.G. Varma, Fluidized bed drying of solids, AIChE J. 36 (1) (1990) 29-38.

[8] J. Raghuraman, Y.B.G. Varma, A model for residence time distribution in multistage systems with cross-flow between active and dead regions, Chem. Eng. Sci. 28 (2) (1973) 585-591.

[9] K. Krisrnaiah, Y. Pydisetty, Y.B.G. Varma, Residence time distribution of solids in multistage fluidisation, Chem. Eng. Sci. 37 (9) (1982) 1371-1377.

[10] S.S. Chapadgaokar, Y. Pydi Setty, Residence time distribution of solids in a fluidised bed, Indian J. Chem. Technol. 6 (1999) 100-106.

[11] M.P. Babu, Y.P. Setty, Residence time distribution of solids in a fluidized bed, Can. J. Chem. Eng. 81 (1) (2003) 118-123.

[12] M.A.T. Cocquerel, Some studies of solids mixing in fluidized beds, Ph. D. Thesis, University of London, England, 1960.

[13] P. Bachmann, E. Tsotsas, Analysis of residence time distribution data in horizontal fluidized beds, Procedia Eng. 102 (2015) 790-798.

[14] D. Wolf, W. Resnick, Residence time distribution in real systems, Ind. Eng. Chem. Fundam. 2 (4) (1963) 287-293.

[15] D.Wolf,W. Resnick, Experimental study of residence time distribution inmultistage fluidized bed, Ind. Eng. Chem. Fundam. 4 (1) (1965) 77-81.

[16] D.R. Morris, K.E. Gubbins, S.B. Watkins, Residence time studies in fluidized and moving bedswith continuous solids flow, Trans. Inst. Chem. Eng. 42 (1964) 323-331.

[17] J.Chen, H. Li,X. Lv, Q. Zhu, A structure-based dragmodel for the simulationofGeldart A and B particles in turbulent fluidized beds, Powder Technol. 274 (2015) 112-122.

[18] H. Li, Important relationship between meso-scale structure and transfer coefficients in fluidized beds, Particuology 8 (6) (2010) 631-633.

[19] X. Lv, H. Li, Q. Zhu, Simulation of gas-solid flow in 2D/3D bubbling fluidized beds by combining the two-fluid model with structure-based drag model, Chem. Eng. J. 236 (2014) 149-157.

[20] Q. Han, N. Yang, J. Zhu, M. Liu, Onset velocity of circulating fluidization and particle residence time distribution: A CFD-DEM study, Particuology 21 (2015) 187-195.

[21] R. Andreux, G. Petit, M. Hemati, O. Simonin, Hydrodynamic and solid residence time distribution in a circulating fluidized bed: Experimental and 3D computational study, Chem. Eng. Process. Process Intensif. 47 (3) (2008) 463-473.

[22] Y. Zhang, Z. Wang, Y. Jin, Z. Li, W. Yi, CFD simulation and experiment of residence time distribution in short-contact cyclone reactors, Adv. Powder Technol. 26 (4) (2015) 1134-1142.

[23] H. Bai, A. Stephenson, J. Jimenez, D. Jewell, P. Gillis, Modeling flow and residence time distribution in an industrial-scale reactor with a plunging jet inlet and optional agitation, Chem. Eng. Res. Des. 86 (12) (2008) 1462-1476.

[24] L. Li, J. Remmelgas, B.G.M. vanWachem, C. von Corswant, M. Johansson, S. Folestad, A. Rasmuson, Residence time distributions of different size particles in the spray zone of a Wurster fluid bed studied using DEM-CFD, Powder Technol. 280 (2015) 124-134.

[25] P. Pongsivapai, Residence Time Distribution of Solids in a Multi-compartment Fluidized Bed System, Master Thesis, Oregon State Univ, USA, 1994.

[26] O. Levenspiel, Tracer Technology: Modeling the Flow of Fluids, Springer-Verlag, New York, 2012.

[27] J.T. Adeosun, A. Lawal, Numerical and experimental studies of mixing characteristics in a T-junction microchannel using residence-time distribution, Chem. Eng. Sci. 64 (10) (2009) 2422-2432.

[28] I.L. Gamba, S.M. Damian, D.A. Estenoz, N. Nigro, M.A. Storti, D. Knoeppel, Residence time distribution determination of a continuous stirred tank reactor using computational fluid dynamics and its application on the mathematical modeling of styrene polymerization, Int. J. Chem. React. Eng. 10 (1) (2012) 1-30.

[29] N.O. Lemcoff, E.N. Ponzi, M.G. Gonzáles, Comparison between the dispersion and tanks in series models, Chem. Eng. Sci. 35 (8) (1980) 1804-1806.

[30] Y. Wang, Z. Zou, H. Li, Q. Zhu, A new drag model for TFM simulation of gas-solid bubbling fluidized beds with Geldart-B particles, Particuology 15 (2014) 151-159.

[31] J.A.H. De Jong, Vertical air-controlled particle flow from a bunker through circular orifices, Powder Technol. 3 (1) (1969) 279-286.

[32] J.F. Davidson, R. Clift, D. Harrison, Fluidization, second ed. Academic Press, London, 1985.

[33] Y. Kato, S. Morooka, A. Nishiwaki, Behavior of dispersed- and continuous-phase in multi-stage fluidized beds for gas-liquid-solid and gas-liquid-liquid systems, Fluidization '85, Science and Technology, Beijing, China, 1985.

[34] L. Wei, Y. Lu, J. Wei, Hydrogen production by supercritical water gasification of biomass: Particle and residence time distribution in fluidized bed reactor, Int. J. Hydrog. Energy 38 (29) (2013) 13117-13124.

CFD simulation of solids residence time distribution in a multi-compartment fluidized bed

CFD simulation of solids residence time distribution in a multi-compartment fluidized bed

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Chaojie Li, Xianxin Fang, Meiling Sun, Jihai Duan, Weiwen Wang. Study on two-phase cloud dispersion from liquefied CO₂ release [J]. Chinese Journal of Chemical Engineering, 2023, 60(8): 37-45.
[2]	Lijuan Zhao, Zhe Tan, Xiaoguang Zhang, Qijun Zhang, Wei Wang, Qiang Deng, Jie Ma, De'an Pan. Research on process modeling and simulation of spent lead paste desulfurization enhanced reactor [J]. Chinese Journal of Chemical Engineering, 2023, 60(8): 293-303.
[3]	Hongwei Liang, Wenling Li, Zisheng Feng, Jianming Chen, Guangwen Chu, Yang Xiang. Numerical simulation of gas-liquid flow in the bubble column using Wray-Agarwal turbulence model coupled with population balance model [J]. Chinese Journal of Chemical Engineering, 2023, 58(6): 205-223.
[4]	Chengang Yang, Huaizhi Han, Quan Zhu, Xiangyuan Li. Cracking and buoyancy effect on hydrocarbon endothermic and heat transfer characteristics in rectangular mini-channel [J]. Chinese Journal of Chemical Engineering, 2023, 56(4): 242-254.
[5]	Shuangfei Zhao, Yingying Nie, Wenyan Zhang, Runze Hu, Lianzhu Sheng, Wei He, Ning Zhu, Yuguang Li, Dong Ji, Kai Guo. Microfluidic field strategy for enhancement and scale up of liquid–liquid homogeneous chemical processes by optimization of 3D spiral baffle structure [J]. Chinese Journal of Chemical Engineering, 2023, 56(4): 255-265.
[6]	Tian Zhang, Qingshan Huang, Shujun Geng, Aqiang Chen, Yan Liu, Haidong Zhang. Impacts of solid physical properties on the performances of a slurry external airlift loop reactor integrating mixing and separation [J]. Chinese Journal of Chemical Engineering, 2023, 55(3): 1-12.
[7]	Qi Han, Xin-Yuan Zhang, Hai-Bo Wu, Xian-Tai Zhou, Hong-Bing Ji. Different efficiency toward the biomimetic aerobic oxidation of benzyl alcohol in microchannel and bubble column reactors: Hydrodynamic characteristics and gas–liquid mass transfer [J]. Chinese Journal of Chemical Engineering, 2023, 55(3): 84-92.
[8]	Songsong Wang, Hong Li, Changyuan Tao, Renlong Liu, Yundong Wang, Zuohua Liu. Study on cavern evolution and performance of three mixers in agitation of yield-pseudoplastic fluids [J]. Chinese Journal of Chemical Engineering, 2023, 55(3): 111-122.
[9]	Tianpeng LiZhou, Jiajia Luo, Tiefeng Wang. Enhancement of acetylene and ethylene yields in partially decoupled oxidation of ethane by changing the composition of heat carrier [J]. Chinese Journal of Chemical Engineering, 2022, 47(7): 71-78.
[10]	Yongjun Wu, Pan You, Peicheng Luo. Effect of pitched short blades on the flow characteristics in a stirred tank with long-short blades impeller [J]. Chinese Journal of Chemical Engineering, 2022, 45(5): 143-152.
[11]	Shenglin Yan, Yan Zhang, Chong Peng, Xiaoyong Yang, Yuan Huang, Zhishan Bai, Xiao Xu. Oil droplet movement and micro-flow characteristics during interaction process between gas bubble and oil droplet in flotation [J]. Chinese Journal of Chemical Engineering, 2022, 45(5): 229-237.
[12]	Mohsen Rezaeimanesh, Ali Asghar Ghoreyshi, S.M. Peyghambarzadeh, Seyed Hassan Hashemabadi. A coupled CFD simulation approach for investigating the pyrolysis process in industrial naphtha thermal cracking furnaces [J]. Chinese Journal of Chemical Engineering, 2022, 44(4): 528-542.
[13]	Anshi Hong, Zisheng Zhang, Xingang Li, Xin Gao. A generalized CFD model for evaluating catalytic separation process in structured porous materials [J]. Chinese Journal of Chemical Engineering, 2022, 51(11): 168-177.
[14]	Chunhui Li, Bin Wu, Junjie Zhang, Peicheng Luo. Effect of swirling addition on the liquid mixing performance in a T-jets mixer [J]. Chinese Journal of Chemical Engineering, 2022, 50(10): 108-116.
[15]	Wen-Cong Chen, Ya-Wei Fan, Liang-Liang Zhang, Bao-Chang Sun, Yong Luo, Hai-Kui Zou, Guang-Wen Chu, Jian-Feng Chen. Computational fluid dynamic simulation of gas-liquid flow in rotating packed bed: A review [J]. Chinese Journal of Chemical Engineering, 2022, 41(1): 85-108.