The Effect of Coal Composition on Ignition and Flame Stability in Coaxial Oxy-Fuel Turbulent Diffusion Flames
| Autor: | Eric G. Eddings, Yuegui Zhou, Kerry E. Kelly, Dadmehr Rezaei, Ronald J. Pugmire, Jost O.L. Wendt, Mark S. Solum, Jingwei Zhang |
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| Rok vydání: | 2013 |
| Předmět: |
Bituminous coal
Premixed flame Turbulent diffusion Laminar flame speed business.industry Chemistry General Chemical Engineering geology.rock_type Diffusion flame geology Energy Engineering and Power Technology Thermodynamics respiratory system Combustion complex mixtures humanities respiratory tract diseases law.invention Ignition system fluids and secretions Fuel Technology law Environmental chemistry Coal business |
| Zdroj: | Energy & Fuels. 27:4935-4945 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | The purpose of the research reported here is to explore how minor coal composition changes can affect oxy-coal flame ignition. Whereas previous work focused on the stability of coaxial turbulent diffusion flames for a single coal, we explore here how two coals of similar rank, fired under aerodynamically identical input conditions, may show very different flame stability characteristics. Since oxy-coal combustion allows oxygen contents in primary and secondary oxidant streams to be varied, flame stability characteristics were determined here by effects of partial pressure of oxygen (PO2) in the primary stream (with differing preheat temperatures in the secondary stream) and effects of PO2 in the secondary stream (with zero O2 in the primary stream), on the flame stand-off distance. The two coals investigated were a Utah Skyline bituminous coal and an Illinois #6 bituminous coal. Flame stability was quantified by probability density functions (PDF) of the flame stand-off distance, which were determined usi... |
| Databáze: | OpenAIRE |
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