Abstract
In dense pneumatic conveying, flow blockage is a severe problem in the horizontal pipe, so accelerating the collapse velocity of blockage can improve the efficiency of powder transportation. In this paper, we offered a new method of the pipe-rotation mechanism and focused on the effect of this method on blockage collapse from collapse velocity, mass flow rate, and the change of the particle region. The physical model developed is horizontal pipe-rotation geometry at a uniform rotational speed of 0, 150, 300, 450, and 600 rpm, respectively. Then we used a computational fluid dynamics and discrete element method (CFD-DEM) model to investigate a single slug of particles passing through these geometries. The results show that collapse velocity and the mass flow rate increase with increasing rotational speed, which proves that the pipe-rotation mechanism can accelerate the collapse of flow blockage evidently. Moreover, the pipe-rotation mechanism changes the particle region significantly, which is polarized in the lower half of the pipe. It is trusted that the findings reported in this paper well serve as a helping source for further studies toward dense pneumatic conveying.
Funding source: Education Department of Shandong Province
Award Identifier / Grant number: ZR2019BEE014
Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This research was funded by‘Doctoral fund’ project of Education Department of Shandong Province (ZR2019BEE014).
Conflicts of Interest: The authors declare no conflict of interest.
References
Behera, N., V. K. Agarwal, M. G. Jones, and K. C. Williams. 2012. “Transient Parameter Analysis of Fluidized Dense Phase Conveying.” Powder Technology 217: 261–8, https://doi.org/10.1016/j.powtec.2011.10.036.10.1016/j.powtec.2011.10.036Search in Google Scholar
Cheng, A. P. 2018. Study on Energy Consumption of Pneumatic Conveying Polyacrylamide Particles by CFD-DEM. Qingdao Chian: Qingdao University of Science &Technology.Search in Google Scholar
Cox, P. W., S. Bakalis, H. Ismail, R. Forster, D. J. Parker, and P. J. Fryer. 2003. “Visualisation of Three-Dimensional Flows in Rotating Cans using Positron Emission Particle Tracking (PEPT).” Journal of Food Engineering 60: 229–40, https://doi.org/10.1016/s0260-8774(03)00042-6.10.1016/S0260-8774(03)00042-6Search in Google Scholar
Di Renzo, A., and F. P. Di Maio. 2004. “Comparison of Contact-Force Models for the Simulation of Collisions in DEM-Based Granular Flow Codes.” Chemical Engineering Science 59: 525–41, https://doi.org/10.1016/j.ces.2009.12.025.Search in Google Scholar
Ergun, S. 1952. “Fluid Flow through Packed Columns.” Chemical Engineering Progress 48: 89–94, https://doi.org/10.1016/j.powtec.2013.10.013.Search in Google Scholar
Feng, Y. Q, and A. B. Yu. 2004. “Assessment of Model Formulations in the Discrete Particle Simulation of Gas-Solid Flow.” Industrial & Engineering Chemistry Research 43: 8378–90, https://doi.org/10.1016/0301-9322(92)90012-6.Search in Google Scholar
Gidaspow, D. 1994. Multiphase Flow and Fluidization: Continuum and Kin-Etic Theory Descriptions. Boston: Academic Press.Search in Google Scholar
Hilgraf, P. 1987. “Minimum Conveying Gas Velocities in the Pneumatic Transport of Solids.” ZKG International 40: 610–16.Search in Google Scholar
Hilton, J. E., and P. W. Cleary. 2011. “The Influence of Particle Shape on Flow Modes in Pneumatic Conveying.” Chemical Engineering Science 66: 231–40, https://doi.org/10.1016/j.powtec.2016.10.035.Search in Google Scholar
Imao, S., M. Itoh, and T. Harada. 1996. “Turbulent Characteristics of the Flow in an Axially Rotating Pipe.” International Journal of Heat and Fluid Flow 17: 444–51, https://doi.org/10.1016/j.powtec.2010.11.008.Search in Google Scholar
Imao, S., M. Itoh, and T. Harada. 2008. “Impact of Solids Fraction and Fluid Viscosity on Solids Flow in Rotating Cans.” Food Research International 41: 658–66, https://doi.org/10.1016/0032-5910(86)85001-x.Search in Google Scholar
Kafui, K. D., C. Thornton, and M. J. Adams. 2002. “Discrete Particle-Continuum Fluid Modelling of Gas-Solid Fluidised Beds.” Chemical Engineering Science 57: 2395–410, https://doi.org/10.1016/j.cep.2004.02.011.Search in Google Scholar
Kafui, D. K., S. Johnson, C. Thornton, and J. P. Seville. 2011. “Parallelization of a Lagrangian-Enlurian DEM-CFD Code for Application to Fluidized Beds.” Powder Technology 207: 270–8, https://doi.org/10.1016/j.powtec.2020.02.050.Search in Google Scholar
Klinzing, G. E.. 2002. “Dense Phase (Plug) Conveying-Observations and Projections.” In Handbook of Conveying and Handling of Particulate Solids, edited by Levy, A., and H. Kalman, 291–301. Amsterdam: Elsevier.10.1016/S0167-3785(01)80034-8Search in Google Scholar
Konrad, K. 1986. “Dense-phase Pneumatic Conveying: a Review.” Powder Technology 49: 1–35, https://doi.org/10.1016/j.powtec.2011.10.036.Search in Google Scholar
Kuang, S. B., and A. B. Yu. 2011. “Micromechanic Modelling and Analysis of the Flow Regimes in Horizontal Pneumatic Conveying.” AIICHE Jounal 57: 2708–25, https://doi.org/10.1007/s10035-004-0161-2.Search in Google Scholar
Kuang, S. B., K. Li, R. P. Zou, R. H. Pan, and A. B. Yu. 2013. “Application of Periodic Boundary Condition to CFD-DEM Simulation of Gas-Solid Flow in Pneumatic Conveying.” Chemical Engineering Science 93: 214–28, https://doi.org/10.1016/j.ijmultiphaseflow.2018.11.012.Search in Google Scholar
Li, J., C. Webb, S. S. Pandiella, G. M. Campbell, T. Campbell, A. Cowell, and D. McGlinchey. 2005. “Solids Deposition in Low-Velocity Slug Flow Pneumatic Conveying.” Chemical Engineering and Processing 44: 167–73, https://doi.org/10.1016/j.cep.2004.02.011.Search in Google Scholar
Li, K., S. B. Kuang, R. Pan, and A. B. Yu. 2014. “Numerical Study of Horizontal Pneumatic Conveying: Effect of Material Properties.” Powder Technology 251: 15–24, https://doi.org/10.1016/j.ces.2006.12.089.Search in Google Scholar
Liang, C., X. Chen, W. Pu, C. Zhao, P. Lu, and C. Fan. 2007. “Flow Characteristics and Shannon Entropy Analysis of Dense-phase Pneumatic Conveying of Pulverized Coal under High Pressure.” Journal of Chemical Industry and Engineering 58: 1191–6, https://doi.org/10.1016/s0009-2509(02)00140-9.Search in Google Scholar
Lin, Z., Y. F. Zhang, Y. Li, X. J. Li, and X. Zhu. 2017. “Prediction of Particle Distribution and Particle Impact Erosion in Inclined Cavities.” Powder Technology 305: 562–71, https://doi.org/10.1016/j.ces.2003.09.037.Search in Google Scholar
Lin, Z., X. W. Sun, T. C. Yu, Y. F. Zhang, Y. Li, and Z. C. Zhu. 2020. “Gas–solid Two-phase Flow and Erosion Calculation of Gate Valve Based on the CFD-DEM Model.” Powder Technology 366: 395–407, https://doi.org/10.1016/s0260-8774(03)00042-6.Search in Google Scholar
Mei, R. 1992. “An Approximate Expression for the Shear Lift Force on a Spherical Particle at Finite Reynolds Number.” International Journal of Multiphase Flow 18: 145–7, https://doi.org/10.1016/0301-9322(82)90046-5.Search in Google Scholar
Mills, D. 2004. Pneumatic Conveying Design Guide. Butterworth-Heinemann United Kingdom: Elsevier.Search in Google Scholar
Oesterlé, B., and T. B. Dinh. 1998. “Experiments on the Lift of a Spinning Sphere in a Range of Intermediate Reynolds Numbers.” Experiments in Fluids 25: 16–22, https://doi.org/10.1016/0032-5910(92)88030-l.Search in Google Scholar
Pan, Y., T. Tanaka, and Y. Tsuji. 2002. “Turbulence Modulation by Dispersed Solid Particles in Rotating Channel Flows.” International Journal of Multiphase Flow 28: 527–52, https://doi.org/10.1016/j.ces.2013.01.055.Search in Google Scholar
Pu, W. H., C. Zhao, Y. Xiong, C. Liang, X. Chen, P. Lu, and C. Fan. 2010. “Numerical Simulation on Dense Phase Pneumatic Conveying of Pulverized Coal in Horizontal Pipe at High Pressure.” Chemical Engineering Science 65: 2500–12, https://doi.org/10.1016/j.powtec.2020.03.047.Search in Google Scholar
Ratnayake, C. 2005. A Comprehensive Scaling up Technique for Pneumatic Transport Systems. Porsgrunn, Norway: NTNU.Search in Google Scholar
Rinoshika, A., and M. Suzuki. 2010. “An Experimental Study of Energy-Saving Pneumatic Conveying System in a Horizontal Pipeline with Dune Model.” Powder Technology 198: 49–55, https://doi.org/10.1021/ie049387v.Search in Google Scholar
Tsuji, Y., and Y. Morikawa. 1982. “Flow Pattern and Pressure Fluctuation in Air-Solid Two-phase Flow in a Pipe at Low Air Velocities.” International Journal of Multiphase Flow 8: 329–41, https://doi.org/10.1017/s002211201000306x.Search in Google Scholar
Tsuji, Y., T. Tanaka, and T. Ishida. 1992. “Lagrangian Numerical Simulation of Plug Flow of Cohesionless Particles in a Horizontal Pipe.” Powder Technology 71: 239–50, https://doi.org/10.1016/s0301-9322(01)00084-2.Search in Google Scholar
Valiantzas, J. D. 2008. “Explicit Power Formula for the Darcy-Weisbach Pipe Flow Equation: Application in Optimal Pipeline Design.” Journal of Irrigation and Drainage Engineering 134: 454–61, https://doi.org/10.1016/s0032-5910(02)00224-3.Search in Google Scholar
Wen, C. Y., and Y. H. Yu. 1966. “Mechanics of Fluidization.” Chemical Engineering Progress 62: 100–11, https://doi.org/10.1016/j.powtec.2009.10.013.Search in Google Scholar
Wypych, P. W., and J. L. Yi. 2003. “Minimum Transport Boundary for Horizontal Dense-phase Pneumatic Conveying of Granular Materials.” Powder Technology 129: 111–21, https://doi.org/10.1016/0142-727x(96)00057-4.Search in Google Scholar
Xiang, J., and D. McGchey. 2004. “Numerical Simulation of Particle Motion in Dense Phase Pneumatic Conveying.” Granular Matter 6: 167–72, https://doi.org/10.1007/s10035-004-0161-2.Search in Google Scholar
Xu, B. H., and A. B. Yu. 1997. “Numerical Simulation of the Gas -solid Flow in Fluidized Bed by Combining Discrete Particle Method with Computation Fluid Dynamics.” Chemical Engineering Science 52: 2785–809, https://doi.org/10.1016/s0009-2509(97)00081-x.10.1016/S0009-2509(97)00081-XSearch in Google Scholar
Xu, H., W. Zhong, Z. Yuan, and A. B. Yu. 2016. “CFD-DEM Study on Cohesive Particles in a Spouted Bed.” Powder Technology 314: 10–19, https://doi.org/10.1061/(asce)0733-9437(2008)134:4(454).10.1016/j.powtec.2016.09.006Search in Google Scholar
Yosef, B., E. Hajidavalloo, S. Mohsen, H. Zadeh, and M. Behbahani-Nejada. 2019. “Effect of Pipe Rotation on Flow Pattern and Pressure Drop of Horizontal Two-phase Flow.” International Journal of Multiphase Flow 111: 101–11, https://doi.org/10.1002/aic.12480.Search in Google Scholar
Yuan, Z. L., L. P. Zhu, and G. Fan. 2013. Gas Solid Two Phase Flow and Numerical Simulation. Nanjing: Southeast University Press.Search in Google Scholar
YuXin, S. 2016. Numerical Simulation of Dense Phase Plug Flow Pneumatic Conveying. Jilin Chian: Jilin University.Search in Google Scholar
Zhang, G., Y. F. Zhang, Q. Liu, Y. Li, and Z. Lin. 2020. “Experimental Study on the Two-phase Flow of Gas-Particles through a Model Brake Valve.” Powder Technology 367: 172–82, https://doi.org/10.1016/j.powtec.2020.03.047.10.1016/j.powtec.2020.03.047Search in Google Scholar
Zhou, Z. Y., S. B. Kuang, K. W. Chu, and A. B. Yu. 2010. “Discrete Particle Simulation of Particle-Fluid Flow: Model Formulations and their Applicability.” Journal of Fluid Mechanics 661: 482–510, https://doi.org/10.1016/s0009-2509(97)00081-x.Search in Google Scholar
Zhu, H. P., Z. Y. Zhou, R. Y. Yang, and A. B. Yu. 2007. “Discrete Particle Simulation of Particulate Systems: Theoretical Developments.” Chemical Engineering Science 62: 3378–96, https://doi.org/10.1016/j.ces.2006.12.089.10.1016/j.ces.2006.12.089Search in Google Scholar
© 2020 Walter de Gruyter GmbH, Berlin/Boston
