Abstract
The effect of primary air fraction ƒ 1, outer secondary air swirl strength and excess oxygen coefficient on the combustion characteristics of petroleum coke, Hejin lean coal and Shenmu soft coal are researched on a one-dimensional furnace using a dual channel swirl burner. The results show that with the increase in primary air fraction ƒ 1, the NO x emission concentrations of both Hejin lean coal and petroleum coke increase, and the combustion worsens in the earlier stage, but the burn-out rate of Shenmu soft coal is improved. The NO x emission concentration obtains a minimum value with an increase in ƒ 1. The ignition and burn-out rate of petroleum coke and Shenmu soft coal are optimal when Ωdl is minimum and Ωdl= 0.87, respectively. However, both the NO x emission concentration of petroleum coke and Shenmu soft coal are minimum when Ωdl= 1.08. The increase in excess oxygen coefficient delays the ignition of petroleum coke, worsens the combustion condition and increases the NO x emission concentration, but it greatly decreases the NO x emission concentration of Shenmu soft coal.
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Zhou, Q., Zhao, Q., Zhou, G. et al. Comparison of combustion characteristics of petroleum coke and coal in one-dimensional furnace. Front. Energy Power Eng. China 4, 436–442 (2010). https://doi.org/10.1007/s11708-009-0059-0
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DOI: https://doi.org/10.1007/s11708-009-0059-0