Development of a High Pressure Dry Coal Feed System for a 100 kWt Oxy-Coal Reactor

Schroedter, Taylor; Adams, Bradley R.; Tuia, Jacob; Fry, Andrew

doi:10.1115/1.4046602

Development of a High Pressure Dry Coal Feed System for a 100 kWt Oxy-Coal Reactor

Journal Article · Wed Apr 08 04:00:00 EDT 2020 · Journal of Energy Resources Technology

DOI:https://doi.org/10.1115/1.4046602· OSTI ID:1799883

Schroedter, Taylor ^[1]; Adams, Bradley R. ^[2]; Tuia, Jacob ^[3]; Fry, Andrew ^[3]

Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602; OSTI
Department of Mechanical Engineering, Brigham Young University, Provo, UT 84602
Department of Chemical Engineering, Brigham Young University, Provo, UT 84602

Abstract

A design concept to feed dry coal from a hopper to a 100 kWt pressurized oxy-coal (POC) reactor using CO2 at 2 MPa was developed using transient computational fluid dynamics (CFD) simulations and bench-scale measurements. The feed system was required to maintain a steady flow of gas and solids at a coal flowrate of approximately 3.8 g/s and a CO2-to-coal mass ratio in the range 1–2. A 5.08-cm diameter vertical coal hopper feeding into a 0.635-cm diameter horizontal pipe was used to represent key elements of the feed system. A fluidized bed concept was found capable of providing the desired coal flowrate and CO2-to-coal flow ratio. Use of separate fluidization and dilution flows allowed the coal flowrate and CO2-to-coal flow ratio to be controlled independently. The amount of coal transported from the hopper was dependent on the net CO2 flow in the hopper but independent of the CO2 dilution flow. Pipe exit coal flowrates were found to fluctuate at levels acceptable for steady burner operation. Tests from a bench-scale apparatus using Pittsburgh 8 coal with a median particle diameter of 50 µm and moisture content of 6% confirmed the feasibility of the fluidization design. However, for a given CO2 fluidization flowrate, experimental coal flowrates were lower than predicted coal flow, in part due to simplifying assumptions of dry, spherical coal particles and smooth piping in the simulations.

Research Organization:: Brigham Young Univ., Provo, UT (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE)

DOE Contract Number:: FE0029157

OSTI ID:: 1799883

Journal Information:: Journal of Energy Resources Technology, Journal Name: Journal of Energy Resources Technology Journal Issue: 7 Vol. 142; ISSN 0195-0738

Publisher:: ASME

Country of Publication:: United States

Language:: English

References (19)

Flow characteristics and stability of dense-phase pneumatic conveying of pulverized coal under high pressure Cai, Liang; Pan, Xu; Chen, Xiaoping Experimental Thermal and Fluid Science, Vol. 41 https://doi.org/10.1016/j.expthermflusci.2012.04.011	journal	September 2012
A critical validation study on CPFD model in simulating gas–solid bubbling fluidized beds Liang, Yongshi; Zhang, Yongmin; Li, Tingwen Powder Technology, Vol. 263 https://doi.org/10.1016/j.powtec.2014.05.003	journal	September 2014
Viscosity variations of coal-oil slurry under high temperature and high pressure during heating process Ren, Yingjie; Zhang, Dexiang; Gao, Jinsheng Fuel Processing Technology, Vol. 92, Issue 12 https://doi.org/10.1016/j.fuproc.2011.07.013	journal	December 2011
Oxy-fuel combustion of pulverized coal: Characterization, fundamentals, stabilization and CFD modeling Chen, Lei; Yong, Sze Zheng; Ghoniem, Ahmed F. Progress in Energy and Combustion Science, Vol. 38, Issue 2 https://doi.org/10.1016/j.pecs.2011.09.003	journal	April 2012
Effects of temperature, pressure, and interparticle forces on the hydrodynamics of a gas-solid fluidized bed Shabanian, Jaber; Chaouki, Jamal Chemical Engineering Journal, Vol. 313 https://doi.org/10.1016/j.cej.2016.12.061	journal	April 2017
Modeling Pressurized Dense Phase Coal Fluidization and Transport Adams, Bradley R.; Schroedter, Taylor L. ASME 2019 Power Conference https://doi.org/10.1115/POWER2019-1874	conference	December 2019
Effect of particle size and sphericity on the pickup velocity in horizontal pneumatic conveying Gomes, L. M.; Mesquita, A. L. Amarante Chemical Engineering Science, Vol. 104 https://doi.org/10.1016/j.ces.2013.08.055	journal	December 2013
Pickup (critical) velocity of particles Kalman, Haim; Satran, Andrei; Meir, Dikla Powder Technology, Vol. 160, Issue 2 https://doi.org/10.1016/j.powtec.2005.08.009	journal	December 2005
Effect of particle characteristics on particle pickup velocity Hayden, Kimberly S.; Park, Kinam; Curtis, Jennifer S. Powder Technology, Vol. 131, Issue 1 https://doi.org/10.1016/S0032-5910(02)00135-3	journal	March 2003
Hydrodynamic Performance of a Novel Design of Pressurized Fluidized Bed Combustor Wang, Alan L. T.; Stubington, John F.; Xu, Jiangang Journal of Energy Resources Technology, Vol. 128, Issue 2 https://doi.org/10.1115/1.2126987	journal	June 2005
Analysis of oxy-fuel combustion power cycle utilizing a pressurized coal combustor Hong, Jongsup; Chaudhry, Gunaranjan; Brisson, J. G. Energy, Vol. 34, Issue 9 https://doi.org/10.1016/j.energy.2009.05.015	journal	September 2009
Operating parameter effects on the solids circulation rate in the CFD simulation of a dual fluidized-bed gasification system Liu, Hui; Cattolica, Robert J.; Seiser, Reinhard Chemical Engineering Science, Vol. 169 https://doi.org/10.1016/j.ces.2016.11.040	journal	September 2017
Behaviour of gas-fluidized beds of fine powders part I. Homogeneous expansion Abrahamsen, A. R.; Geldart, D. Powder Technology, Vol. 26, Issue 1 https://doi.org/10.1016/0032-5910(80)85005-4	journal	May 1980
Investigation of influence of coal properties on dense-phase pneumatic conveying at high pressure Liang, Cai; Xie, Xiaoxu; Xu, Pan Particuology, Vol. 10, Issue 3 https://doi.org/10.1016/j.partic.2012.01.003	journal	June 2012
CPFD simulation of a fast fluidized bed steam coal gasifier feeding section Abbasi, Alireza; Ege, Paul E.; de Lasa, Hugo I. Chemical Engineering Journal, Vol. 174, Issue 1 https://doi.org/10.1016/j.cej.2011.07.085	journal	October 2011
Numerical simulation on dense phase pneumatic conveying of pulverized coal in horizontal pipe at high pressure Pu, Wenhao; Zhao, Changsui; Xiong, Yuanquan Chemical Engineering Science, Vol. 65, Issue 8 https://doi.org/10.1016/j.ces.2009.12.025	journal	April 2010
Biomass Feed System Flow Control Using a Weigh Belt Table Maxwell, T. T.; Nevill, Joe D.; Ertas, A. Journal of Energy Resources Technology, Vol. 127, Issue 1 https://doi.org/10.1115/1.1804500	journal	March 2005
Study on the rheology of coal–oil slurries during heating at high pressure Yan, Bingfeng International Journal of Coal Science & Technology, Vol. 4, Issue 3 https://doi.org/10.1007/s40789-017-0170-5	journal	June 2017
Modeling on the hydrodynamics of pressurized high-flux circulating fluidized beds (PHFCFBs) by Eulerian–Lagrangian approach Yin, Shangyi; Zhong, Wenqi; Jin, Baosheng Powder Technology, Vol. 259 https://doi.org/10.1016/j.powtec.2014.03.059	journal	June 2014

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