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Numerical simulations have been conducted to study combustion characteristics of tangentially fired pulverized-coal boiler. A 600 MW tangentially coal-fired boiler was used for investigating the effect of platen super-heaters on the temperature, species distributions and heat transfer. Two furnace models were established, whose difference lies in modelling super-heaters or not. Results show that modelling platen super-heaters is conducive to precisely predict the temperature, species (CO, CO2, O2) and heat flux in the platen zone and has a weak influence on these data in zones below the platen. Modelling platen super-heaters has little influence on the NOx prediction. Platen super-heaters obviously decrease heat absorbed by water-wall nearby and affects heat distribution coefficient of furnace.
PAPER REVISED: 2020-06-26
PAPER ACCEPTED: 2020-07-09
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THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 2, PAGES [833 - 843]
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© 2021 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence