CFD Modeling of CFBC Boilers - Sky
Transcript of CFD Modeling of CFBC Boilers - Sky
CFD Modeling of CFBC Boilers
PSLab JBNU (2017)
Process Flow
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CFBC Boiler
Fuel: crushed coal of 3 to 6 mm size
Bed materials: sand + ash + limestone to reduce SO2emission
Fuel and bed materials circulated by cyclone separation after combustion
Startup by oil burner in the furnace
Combustion Reaction
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CFBC Boiler
Gasification:C + H2O ⇄ CO + H2C + CO2 ⇄ 2CO
Combustion:2C + O2 ⇄ 2CO
Workflow
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Modeling
Geometry
Geometry design
Geometry export for meshing
Geometry supplementation
Mesh topology design
Mesh manipulation
Mesh quality check & export
Boundary conditions
setting
Case configuration
Solve
Data source reading
Mesh Solution Visualization
Filtering
Rendering
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Modeling Geometry
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Modeling Mesh
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Simulation Air Flow
• Air flow simulation
Pressure
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Simulation Air Flow
Velocity
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Simulation Air Flow
Flow vectors
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Simulation Air Flow
Streamlines
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Simulation Gas-Solid Two Phase Flow
Pressure (t = 30s)
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Simulation Gas-Solid Two Phase Flow
Dispersed phase volume fractions (t = 30s)
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Simulation Gas-Solid Two Phase Flow
Velocity (t = 30s)
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Simulation Gas-Solid Two Phase Flow
Flow vectors (t = 30s)
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Simulation Gas-Solid Two Phase Flow
Streamlines (t = 30s)
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Simulation Combustion Reaction
Pressure (t = 30s)
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Simulation Combustion Reaction
Temperature (t = 30s)
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Simulation Combustion Reaction
Reactants (t = 30s)
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Simulation Combustion Reaction
Products (t = 30s)
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Simulation Combustion Reaction
Gas velocity (t = 30s)
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Simulation Combustion Reaction
Streamlines (t = 30s)
Erosion
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Case Study
Erosion patterns inside furnace