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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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低阶粉煤低温干馏燃烧室结构优化
, PP. 55-61
Keywords: 低阶粉煤,低温干馏炉,低温燃烧室,nox排放,cfd模拟
Abstract:
采用cfdfluent6.3软件模拟了自主研发的低阶煤低温干馏炉对喷式低温燃烧室内温度场分布,并对其结构进行了优化。结果表明:在燃烧室内设计4个关于燃烧室中央轴对称的长度分别为800mm和500mm、旋转角度分别为±30°和±10°的直挡板后,燃烧室内横向、纵向平均温度满足褐煤低温热解需求(500～650℃);采用非预混模式、过量空气系数为1.25和煤气管径为50mm时,燃烧室的燃烧特性最佳;过量空气系数、煤气与空气预混方式、管径均会影响燃烧室内温度分布;realizablek-ε湍流模型、p-1辐射模型和非预混燃烧模型适用于计算焦炉煤气和空气低温燃烧室内燃烧温度场分布;模拟计算结果与实验结果基本吻合,误差波动幅度为50～70℃,同时对燃烧后烟气的检测结果表明,烟气排放符合标准要求。
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