NDLI: Optimization of a Coal-Fired Furnace for Oxy Fuel Combustion

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Saravanan, V. Jayanti, Sreenivas Seetharamu, Subramanyam
Copyright Year	2008
Abstract	Oxy-fuel combustion, in which a conventional hydrocarbon fuel is burned in presence of oxygen diluted with carbon dioxide (called henceforth as oxy-fuel), is an emerging technology that accommodates CO2 sequestration while offering the prospect of low emissions. Dilution by CO2 (from flue gas recirculation) prevents high peak temperatures thereby reducing material damage, high NOx formation etc. Studies [1] reveal that CO2-diluted flames are unstable as compared to N2-diluted flames and that a higher molar fraction of oxygen, 30% by volume, is necessary to ensure stable combustion. Nevertheless, as the heat transfer properties of CO2/O2–70:30 mixtures are different to that of normal air, the flow profiles and heat flux distributions might vary within the furnace. While considering the retrofit of existing normal air operated coal fired furnaces with oxy-fuel mode, it is imperative to investigate these flow variations in detail. In the present study, Computational Fluid Dynamics (CFD) based simulations have been done for a typical 210 MW Indian pulverized coal fired furnace under normal air combustion and under oxy-fuel combustion (CO2/O2-70:30 volume %) mode and the results in terms of CO2 concentration, temperature distribution, velocity of flue gas, particle trajectories and devolatilisation characteristics have been compared.
Starting Page	445
Ending Page	453
Page Count	9
File Format	PDF
ISBN	9780791848647
DOI	10.1115/IMECE2008-67181
e-ISBN	9780791838402
Volume Number	Volume 3: Combustion Science and Engineering
Conference Proceedings	ASME 2008 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2008-10-31
Publisher Place	Boston, Massachusetts, USA
Access Restriction	Subscribed
Subject Keyword	Temperature distribution Oxygen Temperature Computational fluid dynamics Carbon dioxide Combustion Fuels Flow (dynamics) Optimization Heat flux Emissions Flames Furnaces Simulation Particulate matter Coal Nitrogen oxides Flue gases Engineering simulation Carbon capture and storage Damage Heat transfer
Content Type	Text
Resource Type	Article

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