分解窑混煤富氧燃烧研究

发布时间：2018-07-07 07:50

本文选题：分解窑 + 富氧燃烧　；参考：《中南大学学报(自然科学版)》2017年11期

【摘要】：以2 500 t/d带四通道煤粉燃烧器的水泥分解窑为研究对象,通过理论分析和数值仿真方法,对分解窑内混煤富氧燃烧特性和燃烧规律进行研究,并通过实验验证仿真计算结果的可靠性。研究结果表明:随着燃烧器一次风O_2摩尔分数增加,煤粉着火温度逐渐降低,燃烧温度、窑内传热速率逐渐增加;应用富氧燃烧技术能显著改善分解窑混煤燃烧特性,大幅提高无烟煤掺混比;与一般空气助燃相比,当一次风O_2摩尔分数提高到27%时,火焰平均温度提高97 K,焦炭燃尽率提高5.09%,在此O_2摩尔分数下,无烟煤掺比增至60%时,混煤仍能高效稳定燃烧,火焰温度和形状仍能满足熟料煅烧要求。
[Abstract]:Taking the cement calciner with a four-channel pulverized coal burner at 2 500 t / d as the research object, the combustion characteristics and combustion law of mixed coal in decomposing kiln were studied by theoretical analysis and numerical simulation. The reliability of the simulation results is verified by experiments. The results show that the ignition temperature of pulverized coal decreases gradually, the combustion temperature and heat transfer rate increase with the increase of the molar fraction of primary air O _ 2 in burner, and the combustion characteristics of mixed coal in decomposed kiln can be improved by using oxygen-enriched combustion technology. The blending ratio of anthracite is greatly increased; when the primary air O _ 2 mole fraction is increased to 27, the average flame temperature is increased by 97 K, and the coke burnout rate is increased by 5.09%. At this O _ 2 mole fraction, the anthracite blending ratio increases to 60%. The mixing coal can still burn efficiently and stably, and the flame temperature and shape can still meet the requirements of clinker calcination.
【作者单位】：湘潭大学机械工程学院;中南大学能源科学与工程学院;浙江大学能源工程学院;
【基金】：国家自然科学基金资助项目(51590891) 郴州市科技计划重点项目(CZ2013163)~~
【分类号】：TQ172.625

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