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本文针对微米及亚微米细颗粒物在煤粉自维持燃烧高温一维炉中的沿程演化特性进行了定量模拟。从高温火焰区到焦炭燃烧区,利用聚并机理和碳烟氧化模型计算了细颗粒物浓度的粒径分布(PSD)变化,表明碳烟氧化是焦炭燃烧区颗粒浓度分布变化的主要因素,仅聚并作用无法生成PM_(0.1)以上颗粒。并通过预设碳烟份额得到与实验值吻合较好的焦炭燃烧区出口颗粒浓度分布曲线。
In this paper, the evolution characteristics of micron and sub-micron fine particles in coal-based self-sustaining combustion high temperature one-dimensional furnace were quantitatively simulated. From the high temperature flame zone to the coke combustion zone, the particle size distribution (PSD) variation of the fine particle concentration was calculated using the coalescence mechanism and the soot oxidation model, indicating that the soot oxidation is the main factor for the variation of the particle concentration distribution in the coke combustion zone. And the role can not generate PM_ (0.1) above particles. And through the default soot fraction, the particle concentration distribution curve at the outlet of the coke combustion zone which is in good agreement with the experimental value is obtained.