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Xia D, Mao Z, Zhou S, He X, Wang Y. Optimized Design of Solid-Liquid Dual-Impeller Mixing Systems for Enhanced Efficiency. ACS OMEGA 2023; 8:47635-47645. [PMID: 38144083 PMCID: PMC10733952 DOI: 10.1021/acsomega.3c05762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 11/03/2023] [Accepted: 11/22/2023] [Indexed: 12/26/2023]
Abstract
Flow interferences occur in the dual-impeller stirred tank between paddles as well as between paddles and baffles and the tank wall, leading to inefficient utilization of the stirring energy. To address this issue, this study investigates the flow characteristics within the mixing tank using Euler-Euler numerical simulation and the particle image velocimetry (PIV) experimental method. The three-dimensional nonconstant flow characteristics are analyzed to optimize the critical stirrer geometry. By employing the Sobol method, an approximate model is established for sensitivity analysis to identify key parameters affecting the solid-liquid dual-impeller stirred tank's performance. Numerical simulations demonstrate that the optimized stirred tank exhibits a significantly improved solid-liquid suspension capacity and considerably reduces flow losses near the wall and baffle areas. Under the designated conditions, the cloud height is increased by 8.7%, and power consumption is reduced by 15.6% compared to the prototype. PIV tests performed on the stirred tank before and after optimization confirmed the reliability of the obtained optimization results. The primary objective of this study is to enhance mixing efficiency and homogeneity in solid-liquid mixing tanks while concurrently minimizing energy consumption and cost. These results validate the feasibility of employing a multiobjective optimal design approach that combines the RBF agent model with the Sobol method. The findings offer valuable insights for the design of similar mixing tanks.
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Affiliation(s)
- Ding Xia
- College
of Mechanical Engineering, Zhejiang University
of Technology, Hangzhou 310023, China
- Institute
of Innovation Research of Shengzhou, Zhejiang
University of Technology, Shengzhou 312400, China
| | - Zijian Mao
- College
of Mechanical Engineering, Zhejiang University
of Technology, Hangzhou 310023, China
- Institute
of Innovation Research of Shengzhou, Zhejiang
University of Technology, Shengzhou 312400, China
| | - Shuiqing Zhou
- College
of Mechanical Engineering, Zhejiang University
of Technology, Hangzhou 310023, China
- Institute
of Innovation Research of Shengzhou, Zhejiang
University of Technology, Shengzhou 312400, China
| | - Xing He
- College
of Law, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yixi Wang
- College
of Mechanical Engineering, Zhejiang University
of Technology, Hangzhou 310023, China
- Institute
of Innovation Research of Shengzhou, Zhejiang
University of Technology, Shengzhou 312400, China
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Guo P, Tao S. Chirality enhanced shear‐free mixing of highly viscous fluids in an origami reactor. AIChE J 2022. [DOI: 10.1002/aic.18002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Pengfei Guo
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering Dalian University of Technology Dalian China
- Department of Chemistry, School of Chemical Engineering Dalian University of Technology Dalian Liaoning China
| | - Shengyang Tao
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, School of Chemical Engineering Dalian University of Technology Dalian China
- Department of Chemistry, School of Chemical Engineering Dalian University of Technology Dalian Liaoning China
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3
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Effect of Different Blades on Suspension Characteristics of Anaerobic Digestion Particles and Energy Consumption Optimization Analysis. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8120717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In this study, a solid-liquid mixing system model was established to simulate the coexistence of floating particles (FP) and sinking particles (SP) in the early stage of anaerobic digestion, and the mixing effect and energy consumption of the system were investigated. Four typical blades were selected to compare the solid phase distribution of straw particles under different blade stirring, and the distribution of FP and SP in the coexistence system was clarified. Then the combination of full-factorial design and numerical simulation was applied to compare the effect of blade diameter and blade width on particle mixing, which was better than that of immersion depth. A comprehensive equation was further established to balance the weight between the particle mixing effect and energy consumption and improve the blade design. It provided theoretical support for the design and amplification of subsequent stirring equipment.
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Numerical Simulation of Dense Solid-Liquid Mixing in Stirred Vessel with Improved Dual Axial Impeller. SEPARATIONS 2022. [DOI: 10.3390/separations9050122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
Computational fluid dynamics (CFDs) were adopted in order to investigate the solid suspending process in a dense solid–liquid system (with a solid volume fraction of 30%), agitated by a traditional dual axial impeller and a modified dual axial impeller, otherwise known as a dual triple blade impeller (DTBI) and a dual rigid-flexible triple blade impeller (DRFTBI), respectively. The effects of rotational speed, connection strap length/width, and off-bottom clearance on the solid distribution were investigated. The results show that the proportion of solid concentration larger than 0.4 in the DTBI system was 26.56 times of that in the DRFTBI system. This indicates that the DRFTBI system can strengthen the solid suspension and decrease the solid accumulation in the bottom of the tank. Furthermore, the velocity and turbulent kinetic energy in the DRFTBI system were promoted. In addition, for an optimal selection, the optimum length of connection strap was 1.2 H1, the optimum range of connection strap width was D/7–D/8, and the off-bottom clearance selected as T/4 was better.
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Shen B, Zhan X, Sun Z, He Y, Long J, Li X. PIV experiments and CFD simulations of liquid-liquid mixing in a planetary centrifugal mixer (PCM). Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
This paper reviews existing studies relating to the assessment of sediment concentration profiles within various flow conditions due to their importance in representing pollutant propagation. The effects of sediment particle size, flow depth, and velocity were considered, as well as the eddy viscosity and Rouse number influence on the drag of the particle. It is also widely considered that there is a minimum threshold velocity required to increase sediment concentration within a flow above the washload. The bursting effect has also been investigated within this review, in which it presents the mechanism for sediment to be entrained within the flow at low average velocities. A review of the existing state-of-the-art literature has shown there are many variables to consider, i.e., particle density, flow velocity, and turbulence, when assessing the suspended sediment characteristics within flow; this outcome further evidences the complexity of suspended sediment transport modelling.
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Wang Z, Zhao Y, Yao J. Numerical Investigation of Particle Suspensions in a Liquid–Solid Stirred Tank with Baffles. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c03687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhijie Wang
- International Joint Laboratory on Clean Energy Science and Technology, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, People’s Republic of China
| | - Yanlin Zhao
- International Joint Laboratory on Clean Energy Science and Technology, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, People’s Republic of China
| | - Jun Yao
- International Joint Laboratory on Clean Energy Science and Technology, College of Mechanical and Transportation Engineering, China University of Petroleum-Beijing, Beijing 102249, People’s Republic of China
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Sommer AE, Rox H, Shi P, Eckert K, Rzehak R. Solid-liquid flow in stirred tanks: “CFD-grade” experimental investigation. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116743] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Liang W, Wang D, Qian M, Cai Z, Li Z, Gao Z. Transformation of single drop breakup from binary to ternary and multiple in turbulent jet flows. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.11.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Ayranci I, Kresta SM. Turbulence damping above the cloud height in suspensions of concentrated slurries in stirred tanks. AIChE J 2021. [DOI: 10.1002/aic.17207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Inci Ayranci
- Department of Chemical Engineering Middle East Technical University Ankara Turkey
| | - Suzanne M. Kresta
- Department of Chemical Engineering University of Saskatchewan Saskatoon Canada
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Huang F, Chen P, Wang J, Li Z, Gao Z, Derksen JJ. Refractive Index-Matched PIV Experiments and CFD Simulations of Mixing in a Complex Dynamic Geometry. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c00169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fenglei Huang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Peng Chen
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Junhao Wang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhipeng Li
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Zhengming Gao
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- State Key Laboratory of Chemical Resource Engineering, School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jos J. Derksen
- School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, U.K
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15
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Wang H, Li X, Mao Z, Yang C. New invasive image velocimetry applicable to dense multiphase flows and its application in solid–liquid suspensions. AIChE J 2019. [DOI: 10.1002/aic.16668] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Haoliang Wang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
- School of Chemical EngineeringUniversity of Chinese Academy of Sciences Beijing China
| | - Xiangyang Li
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
| | - Zai‐Sha Mao
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
| | - Chao Yang
- CAS Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of Sciences Beijing China
- School of Chemical EngineeringUniversity of Chinese Academy of Sciences Beijing China
- Green Manufacture InstituteChinese Academy of Sciences Beijing China
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Li G, Li Z, Gao Z, Wang J, Bao Y, Derksen J. Particle image velocimetry experiments and direct numerical simulations of solids suspension in transitional stirred tank flow. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.06.073] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Derksen J. Simulations of dense agitated solid–liquid suspensions – Effects of the distribution of particle sizes. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.05.053] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Derksen JJ. Eulerian-Lagrangian simulations of settling and agitated dense solid-liquid suspensions - achieving grid convergence. AIChE J 2018. [DOI: 10.1002/aic.16061] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J. J. Derksen
- School of Engineering; University of Aberdeen; Aberdeen U.K
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