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OALib Journal期刊
ISSN: 2333-9721
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氧气浓度对劣质煤掺混生活污泥燃烧特性的影响
, PP. 430-435
Keywords: 热重分析,掺混比,富氧燃烧,动力学补偿效应
Abstract:
？采用热重分析方法研究了劣质煤掺混生活污泥在氧气浓度20％、30％、50％、70％、90％条件下的燃烧特性和动力学特性.随着氧气浓度的增加,失重率曲线dtg向低温区移动.对着火温度、失重率峰值以及对应温度、燃尽温度、混合物燃烧综合特性指数进行了对比分析,并对固定碳燃烧阶段的表观活化能进行了计算,结果表明,提高氧气浓度能显著改善燃烧条件,表观活化能随着氧气浓度的提高而增大,随掺混比的增加而减小.定义燃烧促进因子c.e.f.(combustionenhancementfactor)表征燃料内外部燃烧促进条件,在固定碳燃烧段,燃烧促进因子随氧气浓度增加迅速增大,表明增大氧气浓度对燃烧具有良好促进作用.燃烧促进因子c.e.f.与表观活化能之间具有动力学补偿效应.
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