(653d) Experimental Analysis of a Vortexing CFB for Process Intensification via High-G Flows

Authors: 
Weber, J., National Energy Technology Laboratory
Breault, R. W., National Energy Technology Laboratory
Shaffer, F. D., National Energy Technology Laboratory, U.S. Department of Energy
Yang, J., ORISE/ORAU

EXPERIMENTAL ANALYSIS OF A VORTEXING CFB FOR PROCESS
INTENSIFICATION VIA HIGH-G FLOWS

Michael Bobek1,2, Jingsi
Yang1,2, Justin Weber1, Frank Shaffer1,
Ronald W. Breault1

1Nattional Energy
Technology Laboratory, Morgantown, WV, USA 26507

2Oak Ridge Institute for Science and Education, Morgantown, WV,
USA, 26507

Fluidized
beds are used in many industries for their favorable characteristics of good
solids mixing, high rates of heat and mass transfer, and large throughputs. In
the never-ending challenge of increasing efficiencies one avenue is through
process intensification, specifically this work focuses on high-g flows, flows
with the centripetal force typically on the order of 10 times the force of
gravity. This operating regime provides intensified gas-solids contact through
higher mass transfer, heat transfer, and gas throughput. This work focuses on
an experimental analysis of a cold flow vortexing circulating fluidized bed.
Through mapping the pressure distribution in the riser and utilizing high speed
cameras to track particle behavior the insights into the behavior of the system
were made and compared to barracuda CFPD modeling of the system. The figure
below shows the high-speed video particle tracking, with results from the video
analysis calculating particle velocities in the vortex of around 19 m/s and
particle velocities of 1 to 2 m/s as they leave the recirculation section.

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