Simulation of coal conversion in a circulating fluidized bed
Conference
·
OSTI ID:10159072
- EG and G/Washington Analytical Services Center, Inc., Albuquerque, NM (United States)
- USDOE Morgantown Energy Technology Center, WV (United States)
A computer code, based on a multi-phase hydrodynamic model, has been developed at the morgantown Energy Technology Center (METC) for the detailed simulation of gas and particle dynamics in coal conversion processes. The particles, like the fluidizing gas, are described as interpenetrating continua. Different particle types are treated as distinct phases. Coupled three-dimensional, transient, partial differential equations, representing the conservation of mass, momentum and energy for each phase, are solved by this code, in either Cartesian or cylindrical coordinates. Constitutive laws have been developed to account for the exchange of momentum between phases (``drag``) and interphase energy transfer. The stress within the granular phase is determined by a formulation based on the kinetic theory and is characterized by a ``granular temperature.`` Recently, species balance equations were added to the code, so that it now has the capability of describing chemical reactions. The code has been tested by simulating several circulating fluidized bed reactors which are being studied at METC. This paper presents a brief description of the capabilities of the code, with some emphasis on its relationship to other hydrodynamic codes used for the simulation of coal conversion reactors, and preliminary results of the simulation of a chemically active riser.
- Research Organization:
- USDOE Morgantown Energy Technology Center, WV (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- OSTI ID:
- 10159072
- Report Number(s):
- DOE/METC/C--93/7066; CONF-930347--1; ON: DE93013485; NC: NONE
- Country of Publication:
- United States
- Language:
- English
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