0
Research Papers: Energy Systems Analysis

Analysis of a Vortexing Circulating Fluidized Bed for Process Intensification Via High-G Flows

[+] Author and Article Information
Michael Bobek, Steve Rowan, Jingsi Yang

National Energy Technology Laboratory,
Morgantown, WV 26507;
Department of Thermal Science,
Oak Ridge Institute for Science and Education,
Morgantown, WV 26507

Justin Weber, Frank Shafer, Ronald W. Breault

National Energy Technology Laboratory,
Morgantown, WV 26507

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received September 19, 2017; final manuscript received January 3, 2018; published online March 29, 2018. Editor: Hameed Metghalchi.The United States Government retains, and by accepting the article for publication, the publisher acknowledges that the United States Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States government purposes.

J. Energy Resour. Technol 140(6), 062003 (Mar 29, 2018) (10 pages) Paper No: JERT-17-1500; doi: 10.1115/1.4039545 History: Received September 19, 2017; Revised January 03, 2018

Fluidized beds are used in many industries where gas–solid reactions are present for their favorable characteristics of good solids mixing, high heat, and mass transfer rates, and large throughputs. In an attempt to increase throughput, reduce reactor footprints, and reduce costs, process intensification by unconventional reactor designs is being pursued. Specifically, this work focuses on the development of high-G reactors where the particles are experiencing a centripetal force typically on the order of ten times the force of gravity. This operating regime provides intensified gas–solids contact providing higher mass transfer, heat transfer, and gas throughput than a typical fluidized bed. This work focuses analysis of a cold flow vortexing circulating fluidized bed (CFB). Through mapping the pressure distributions in the riser, insights into the behavior of the system were made and compared to CPFD Barracuda computational fluid dynamic models. The simulation results outlined the working envelope of the system and provided a baseline to compare the experimental results. The experimental pressure data determined angular velocities of the gas in the range of 30–40 m/s, with corresponding particle velocities around 15 m/s.

Copyright © 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Kunii, D. , and Levenspiel, O. , 1969, Fluidization Engineering, Wiley, New York.
Breault, R. W. , Yarrington, C. S. , and Weber, J. M. , 2016, “ The Effect of Thermal Treatment of hematite Ore for Chemical Looping Combustion of Methane,” ASME J. Energy Resour. Technol., 138(4), p. 042202. [CrossRef]
Hamilton, M. A. , Whitty, K. J. , and Lighty, J. S. , 2016, “ Numerical Simulation Comparison of Two Reacto Configurations for Chemical Looping Combustion and Chemical Looping With Oxygen Uncoupling,” ASME J. Energy Resour. Technol., 138(4), p. 042213. [CrossRef]
Zhang, W. , 2009, “ A Review of Techniques for the Process Intensification of Fluidized Bed Reactors,” Chin. J. Chem. Eng., 17(4), pp. 688–702. [CrossRef]
Nieh, S. , and Yang, G. , 1987, “ Particle Flow Pattern in the Freeboard of a Vortexing Fluidized Bed,” Powder Technol., 50(2), pp. 121–131. [CrossRef]
Yang, G. , and Nieh, S. , 1989, “ On the Suspension Layers in the Freeboard of Vortexing Fluidized Beds,” Powder Technol., 57(3), pp. 171–179. [CrossRef]
Lee, J. K. , Hu, C. G. , Shin, Y. S. , and Chan, H. S. , 1990, “ Combustion Characteristics of a Two-Stage Swirl-Flow Fluidization Bed Combustor,” Can. J. Chem. Eng., 68(5), pp. 824–830. [CrossRef]
Lin, C. H. , Teng, J. T. , and Chyang, C. S. , 1997, “ Evaluation of the Combustion Efficiency and Emission of Pollutants by Coal Particles in a Vortexing Fluidized Bed,” Combust. Flame, 110(1–2), pp. 163–172. [CrossRef]
Arturo, G.-Q. , Reyniers, P. A. , Kulkarni, S. R. , Torregrossu, M. M. , Pereault, P. , Heynderickx, G. J. , and Van Gemm, K. , 2017, “ Design and Cold Flow Testing of a Gas-Solid Vortex Reactor Demonstration Unit for Biomass Fast Pyrolysis,” Chem. Eng. J., 329(1), pp. 198–210.
Baxerres, J. L. , Haewsungcharern, A. , and Gibert, H. , 1977, “ Whirling Bed: A New Technique for Gas Fluidization of Large Particles,” Lebensm.-Wiss. Technol., 10, pp. 191–197.
Chen, Y.-M. , 1987, “ Fundamentals of a Centrifugal Fluidization,” AIChE J., 33(5), pp. 722–728. [CrossRef]
Kao, J. , Pfeffer, R. , and Tardos, G. I. , 1987, “ On Partial Fluidization in Rotating Fluidized Beds,” AIChE J., 33(5), pp. 858–861. [CrossRef]
De Wilde, J. , 2014, “ Gas-Solid Fluidized Beds in Vortex Chambers,” Chem. Eng. Process., 85, pp. 256–290. [CrossRef]
Nieh, S. , Yang, G. , Zhu, A. Q. , and Zhao, C. S. , 1992, “ Measurements of Gas-Particle Flows and Elurtiation of an 18 Inch i.d. Cold Vortexing Fluidized-Bed Combustion Model,” Powder Technol., 69(2), pp. 139–146. [CrossRef]
Ryan, E. M. , Decroix, D. , Breault, R. , Xu, W. , Huckaby, E. D. , Saha, K. , Dartevelle, S. , and Sun, X. , 2013, “ Multi-Phase CFD Modeling of Solid Sorbent Carbon Capture System,” Powder Technol., 242, pp. 117–134. [CrossRef]
Chen, C. , Werther, J. , Heinrich, S. , Qi, H. Y. , and Hartge, E. U. , 2013, “ CFPD Simulation of Circulating Fluidized Bed Risers,” Powder Technol., 235, pp. 238–247. [CrossRef]
Zhang, L. , Wang, Z. , Wang, Q. , Qin, H. , and Xu, X. , 2016, “ Simulation of Oil Shale Semi-Coke Particle Cold Transportation in a Spouted Bed Using CFPD Method,” Powder Technol., 301, pp. 360–368. [CrossRef]
O'Rourke, P. J. , and Snider, D. M. , 2012, “ Inclusion of Collisional Return-to-Isotropy in the MP-PIC Method,” Chem. Eng. Sci., 80, pp. 39–54. [CrossRef]
Snider, D. M. , 2007, “ Three Fundamental Granular Flow Experiments and CFPD Predictions,” Powder Technol., 176(1), pp. 36–46. [CrossRef]
Snider, D. M. , 2001, “ An Incompressible Three-Dimensional Multiphase Particle in Cell Model for Dense Particle Flows,” J. Comput. Phys., 170(2), pp. 523–549. [CrossRef]
Snider, D. M. , O'Rourke, P. J. , and Andrews, M. J. , 1998, “ Sediment Flow in Inclined Vessels Calculated Using a Multiphase Particle-in-Cell Model for Dense Particle Flows,” Int. J. Multiphase Flow, 24(8), pp. 1359–1382.
Andrews, M. J. , and O'Rourke, P. J. , 1996, “ The Multiphase Particle-in-Cell (PIC) Method for Dense Particle Flows,” Int. J. Multiphase Flow, 22(2), pp. 397–402. [CrossRef]
Shaffer, F. , Gopalan, R. , Cocco, R. , Kerri, S. B. , Hays, R. , and Knowlton, T. , 2011, “ High Speed Imaging Observations of Flow Phenomena in CFB Risers,” NETL Multiphase Flow Science Workshop, Pittsburgh, PA, Aug. 16–18.

Figures

Grahic Jump Location
Fig. 6

Effect of entrance condition on radial pressure difference

Grahic Jump Location
Fig. 7

Radial pressure profile (80 m/s)

Grahic Jump Location
Fig. 8

Effect of entrance condition on axial pressure difference

Grahic Jump Location
Fig. 9

Axial pressure profile (80 m/s)

Grahic Jump Location
Fig. 5

Mesh and computational particle comparison

Grahic Jump Location
Fig. 4

Comparison of grid sizing

Grahic Jump Location
Fig. 3

Total mass in riser during simulation

Grahic Jump Location
Fig. 2

Case 1 at various entrance conditions

Grahic Jump Location
Fig. 16

High speed video particle tracking

Grahic Jump Location
Fig. 10

Radial pressure profile for the 68.7 m/s entrance condition

Grahic Jump Location
Fig. 11

radial pressure profile for the 76 m/s entrance condition

Grahic Jump Location
Fig. 12

Radial pressure profile for the 83 m/s entrance condition

Grahic Jump Location
Fig. 13

Radial gas velocity profile for the 68.7 m/s LPM entrance condition

Grahic Jump Location
Fig. 14

Radial velocity profile for the 76 m/s entrance condition

Grahic Jump Location
Fig. 15

Velocity profile for 83 m/s entrance condition

Grahic Jump Location
Fig. 17

Horizontal recirculation section of experimental setup

Grahic Jump Location
Fig. 18

Axial pressure profile comparison for 80 m/s entrance condition

Grahic Jump Location
Fig. 19

Simulation radial pressure drop and velocity for 70 m/s

Grahic Jump Location
Fig. 20

Radial velocity comparison for 70 m/s entrance condition

Grahic Jump Location
Fig. 1

Experimental riser

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In