Numerical analysis of cement calciner fuel efficiency and pollutant emissions

Efficient mixing of pulverized fuel and limestone particles inside cement calciners is important due to the reason that the calcination process directly affects the final fuel consumption. The focus of this paper is on the numerical analysis of cement calciner’s operating conditions and pollutant em...

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Bibliographic Details
Published in:Clean technologies and environmental policy 2013-06, Vol.15 (3), p.489-499
Main Authors: Mikulčić, Hrvoje, von Berg, Eberhard, Vujanović, Milan, Priesching, Peter, Tatschl, Reinhard, Duić, Neven
Format: Article
Language:English
Subjects:
Burnout
Cement
Cement industry
Coal
Decomposition
Earth and Environmental Science
Emissions
Energy
Energy consumption
Environment
Environmental Economics
Environmental Engineering/Biotechnology
Environmental policy
Fluid dynamics
Gases
Greenhouse gases
Heat
Hydrodynamics
Industrial and Production Engineering
Industrial Chemistry/Chemical Engineering
Investigations
Kilns
Limestone
Mathematical models
Numerical analysis
Optimization
Original Paper
Pollutants
Simulation
Sustainable Development
Turbulent flow
Waste to energy
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Summary:Efficient mixing of pulverized fuel and limestone particles inside cement calciners is important due to the reason that the calcination process directly affects the final fuel consumption. The focus of this paper is on the numerical analysis of cement calciner’s operating conditions and pollutant emissions. The paper analyzes the influence of different amounts of fuel, mass flow of the tertiary air and the adiabatic wall condition on the decomposition rate of limestone particles, burnout rate of coal particles, and pollutant emissions of a newly designed cement calciner. Numerical models of calcination process and pulverized coal combustion were developed and implemented into a commercial computational fluid dynamics code, which was then used for the analysis. This code was used to simulate turbulent flow field, interaction of particles with the gas phase, temperature field, and concentrations of the reactants and products, by solving the set of conservation equations for mass, momentum, and enthalpy that govern these processes. A three-dimensional geometry of a real industrial cement calciner was used for numerical simulations. The results gained by these numerical simulations can be used for the optimization of cement calciner’s operating conditions, and for the reducing of its pollutant emissions.
ISSN:1618-954X
1618-9558
DOI:10.1007/s10098-013-0607-5