为了资源化、规模化利用大量堆积的固体废弃物煤气化细渣(coal gasification fine slag，FS)，使用泡沫浮选法对FS中的残炭(residual carbon，RC)进行富集，通过热重分析仪探究RC单独燃烧及与烟煤共燃烧的特性，并对比实验结果与动力学计算结果，阐明RC单独燃烧及与煤共燃烧过程中颗粒的着火性能、燃尽性能、燃烧稳定性以及综合燃烧特性;通过质谱分析仪探究RC单独燃烧及与煤共燃烧过程中CO，CO2，NO2的排放规律。结果表明，浮选过程降低了FS中铝硅酸盐的聚合度，能够有效富集RC;在与煤共燃烧过程中，添加烟煤能够显著改善RC的燃烧反应性，添加不同质量的RC，能够有效减少烟煤燃烧过程中污染物的释放强度，当与煤共燃烧体系中RC的质量分数为80%时，NO2的释放量最少。
Co-combustion Characteristic and Gas Emission Characteristic of Entrained Flow Gasification Fine Slag Residual Carbon and Coal
In order to utilize the large amount of accumulated solid waste coal gasification fine slag(FS)in a resourceful and large-scale manner,this study uses froth flotation to enrich the residual carbon(RC)in FS.The characteristics of RC combustion alone and its co-combustion with bituminous coal are investigated using a thermogravimetric analyzer.By comparing experimental results with kinetic calculations,the ignition perfor-mance,burnout performance,combustion stability,and comprehensive combustion characteristics of particles during single and co-combustion processes are elucidated.Additionally,the emission patterns of CO,CO2,and NO2 during the combustion of RC alone and in combination with coal are explored using a mass spectrometer.The results show that the flotation process effectively reduces the aluminosilicate polymerization degree in FS,enriching RC.The addition of bituminous coal significantly enhances the combustion reactivity of RC during co-combustion.Different mass ratios of RC can effectively reduce pollutant emissions during the combustion of bituminous coal,with an 80% RC mass fraction resulting in the lowest NO2 emissions.
fine slagfroth flotationco-combustion characteristicsgas release
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