Abstract
This study proposed a novel fluidized bed (NRFB) accompanied by grid trays, air distributor, and other internals, which can realize the continuous production of gas–solid non-catalytic reactions. In the reactor, the reverse flow of the gas–solid phase enabled the solid particles to contact efficiently with the gas and to produce solid particles. The discrete phase model was used to simulate the characteristics of the gas–solid two-phase flow and distribution in NRFB with different types of air distributors and different amounts of grid trays. The improved equal-area torus method and the uniformity index were used to quantitatively investigate the particle’s time-average radial concentration in NRFB. The results show that the air distributor can effectively ensure the uniform distribution of gas in the discharge area in NRFB. “Core-annulus” structures occur in the dense phase section in the NRFB without grid tray. The radial distribution uniformity of particle concentration can be improved by about 17% with 9 grid trays installed in NRFB, and more particles would stay in the dense phase section, which is more suitable for reaction, which can effectively improve the reaction efficiency. The guidance for the construction of experimental equipment and fluidization operation can be provided by the results, which are of great significance for the continuous production of “gas–solid non-catalytic reactions” in fine chemical industries.
Similar content being viewed by others
References
Yang S (2016) Flow Structure investigation and computational fluid dynamics simulation for bafled bubbling fluidized beds. Chinese Academy of Sciences (Institute of Process Engineering)
Zheng L, Liu JK, Li XW et al (2012) Numerical simulation of flow characteristics of the wind chamber and distributor perforated area of a bubbling fluidized bed. Chem React Eng Technol 28:294–299
Zhou Q, Jiang CB, Cui KD et al (2020) Experimental and numerical investigation on effect of inclined distributor on hydrodynamic character. Chin J Powder Technol 26:13–19
Shao YJ, Gu JR, Zhong WQ et al (2019) Determination of minimum fluidization velocity in fluidized bed at elevated pressures and temperatures using CFD simulations. Powder Technol 350:81–90. https://doi.org/10.1016/j.powtec.2019.03.039
Peng B, Zhang N, Zhu J (2011) Numerical study of the effect of the gas and solids distributors on the uniformity of the radial solids concentration distribution in CFB risers. Powder Technol 212:89–102. https://doi.org/10.1016/j.powtec.2011.04.036
Peng C, Lv M, Wang SN et al (2018) Effect of fractal gas distributor on the radial distribution of particles in circulating turbulent fluidized bed. Powder Technol 326:443–453. https://doi.org/10.1016/j.powtec.2017.11.011
Cai RR, Gu C, Zhang YG et al (2015) Effect of inclined distributor on the motion behavior of a large spherical object in the bottom zone of a fluidized bed. Powder Technol 277:147–155. https://doi.org/10.1016/j.powtec.2015.02.058
Wang TY, Tang TQ, He YR et al (2015) Analysis of particle behaviors using a region-dependent method in a jetting fluidized bed. Chem Eng J 283:127–140. https://doi.org/10.1016/j.cej.2015.07.038
Weinhart T, Orefice L, Post M et al (2019) Fast, flexible particle simulations-An introduction to MercuryDPM. Compu Phys Commun. https://doi.org/10.1016/j.cpc.2019.107129
Chiesa M, Mathiesen V, Melheim JA et al (2005) Numerical simulation of particulate flow by the Eulerian–Lagrangian and the Eulerian–Eulerian approach with application to a fluidized bed. Comput Chem Eng 29:291–304. https://doi.org/10.1016/j.compchemeng.2004.09.002
Nakamura H, Deguchi N, Takeuchi H et al (2014) Numerical analysis of fluid flow and particle entrainment in a novel tapered rotating fluidized bed. Chem Eng Sci 116:725–733. https://doi.org/10.1016/j.ces.2014.05.052
Al-Akaishi A, Valera-Medina A, Chong CT et al (2017) CFD analysis of the fluidised bed hydrodynamic behaviour inside an isothermal gasifier with different perforated plate distributors. Energy Proc 142:835–840. https://doi.org/10.1016/j.egypro.2017.12.134
Chen YZ (2004) Cold model and numeric simulation study on the spouted-fluidized characteristics of particles of cement raw material. Nanjing Technology University
Wu C, Zhan J (2007) Numerical prediction of particle mixing behavior in a bubbling fluidized bed. Hydrodyn 19:335–341. https://doi.org/10.1016/S1001-6058(07)60067-5
Li MM, Xu J, Wang X et al (2018) Numerical simulation of droplets atomization in spray-freezing fluidized bed based on DPM and PBM. Chin Powder Sci Technol 24:46–51
Wang BC, Zhang K, Zhang D et al (2020) Simulation of supersonic gas–liquid mixing nozzle based on fluent. Clean World 36:35–37
Yu C, Si FQ, Dong YS et al (2019) Coupled simulation and optimization of gas–solid flow and catalyst erosion for SCR system in coal-fired power plant. J Southeast Univ (Nat Sci Edn) 49:133–140
Chen MH, Lu HF, Jin Y et al (2020) Experimental and numerical study on gas–solid two-phase flow through regulating valve of pulverized coal flow. Chem Eng Res Des 155:1–11. https://doi.org/10.1016/j.cherd.2019.12.021
Lv P (2017) Fluidization characteristics and CPFD numerical simulation of dense gas–solid fluidized bed. China University of Mining and Technology
Peng L (2017) Numerical simulation of gas–solids flow and the coupling characteristics of hydrodynamics and reaction in HDCFB. China University of Petroleum, Beijing
Yang CL, Bai JH, Wu F et al (2019) Numerical simulation and structure optimization on fluid flow behavior of three-dimensional integral multi-jet spout-fluidized bed. J Chem Eng Chin Univ 33:1415–1423
Wang CX, Zhang JZ, Lan XY et al (2020) Quantitative study of the gas–solids flow and its heterogeneity/nonuniformity in a 14 m two-dimensional CFB riser reactor. Ind Eng Chem Res 59:437–449. https://doi.org/10.1021/acs.iecr.9b05829
Wu C, Gao X, Cheng YW et al (2013) Experimental and numerical study of solids concentr ation distribution in transition section of turbulent fluidized bed. J Chem Ind Eng 64:858–866
Lan XY, Yan WC, Xu CM et al (2014) Hydrodynamics of gas–solid turbulent fluidized bed of poly disperse binary particles. Powder Technol 262:106–123. https://doi.org/10.1016/j.powtec.2014.04.056
Zhang X (2018) Numerical simulation of gas–solid two-phase flow in a novel integral multi-nozzle spout-fluidized bed. Northwest University
Chen Q, Liu HH, Wang DQ et al (2019) CPFD simulation of gas–solid flow and drying in a small-scale fluidized bed dryer. J China Univ Min Technol 48:415–421
Li AJ, Zhu LY, Wang ZB (2018) Effects of axial injection position on flow dynamics in cyclone reactors. J Chem Eng Chin Univ 32:1034–1041
Liu MS, Lu XF, Wang QH et al (2019) Numerical simulation and experimental investigation of gas–solid flow uniformity in a 600MW CFB boiler. Proc Chin Soc Electr Eng 39:543–549
Zhang YC, Yi WM, Li ZH et al (2019) Gas–solid two-phase vortex flow characteristics in guide vane type cyclone reactors of biomass pyrolysis. Trans Chin Soc Agric Mach 50:281–289
Ren B, Shao YJ, Zhong WQ et al (2012) Investigation of mixing behaviors in a spouted bed with different density particles using discrete element method. Powder Technol 222:85–94
Duan ZY, Li SP, Zhang JM et al (2017) The utility model relates to a gas–solid two-phase reactor with controllable reaction time. ZL201720387404
Duan ZY, Sun SJ, Lan ZJ et al (2020) Numerical simulation of a novel fluidized bed for gas–solid non-catalytic reactions (NRFB). Powder Technol 372:428–437. https://doi.org/10.1016/j.powtec.2020.05.101
Li AJ, Zhu LY, Liu C et al (2019) Transport hydrodynamics of particles in a gas–solid cyclone reactor using a dense discrete phase model and a particle size segmentation method. Powder Technol 354:696–708. https://doi.org/10.1016/j.powtec.2019.06.040
Wu C (2014) Hydrodynamical studies on transition section of turbulent fluidized bed. ZheJiang University
Gao X, Wu C, Cheng YW et al (2012) Experimental and numerical investigation of solid behavior in a gas–solid turbulent fluidized bed. Powder Technol 228:1–13. https://doi.org/10.1016/j.powtec.2012.04.025
Acknowledgements
This work was supported by a grant from The Shandong Province Taishan Scholar Engineering under Special Funding Foundations, Natural Science Foundation of Shandong Province (ZR2020MB122), and The Tackling Key Program of Science and Technology in Shandong Province (No.2019GSF109009).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
On behalf of all authors, the corresponding author states that there is no conflict of interest.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Zhang, H., Xu, M., Sun, S. et al. Discussion on the influence of internal components on the flow field distribution of a new gas–solid non-catalytic fluidized bed (NRFB). Comp. Part. Mech. (2024). https://doi.org/10.1007/s40571-024-00735-w
Received:
Revised:
Accepted:
Published:
DOI: https://doi.org/10.1007/s40571-024-00735-w