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The effect of primary air fraction ƒ1, 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 ƒ1, the NOx emission concentrations of both Hejin lean coal...
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