【摘要】 选用超细化鹤岗、铁法、准噶尔3种原煤、脱灰煤(HCl/HF脱灰),与分别添加MgO、CaO、Al2O3和Fe3O4矿物的脱灰煤制成试验样品.使用DTG(热重/差热分析仪)对不同样品进行燃烧实验,GC-MS(气相色谱质谱联用仪)分析烟气中SO2,设定气体流量为50mL/min,氧气体积分数为20%,升温速率为20℃/min,考察矿物成分对煤粉燃烧时硫转化的影响.结果发现,超细化3种煤的原煤样品燃烧过程中SO2的释放曲线均是3峰曲线,脱灰样品在燃烧过程中SO2的释放曲线是双峰曲线;不同煤种燃烧过程中SO2的最大释放量出现的温度不同,鹤岗煤在3个峰值范围内较均匀,铁法煤在500℃左右SO2的释放量最大,而准噶尔煤在200℃左右SO2的释放量最大;煤中的矿物成分MgO、CaO、Al2O3和Fe3O4对煤燃烧时硫转化有一定的固化作用,固化作用的大小与矿物成分的添加量、种类及煤的品种有关.更多还原

【Abstract】 Three species micro-pulverized coals（Hegang,Tiefa,Zhungeer coal） were studied,the mineral matters（MgO、CaO、Al₂O₃ and Fe₃O₄） were respectively added to the coals.The combustion of samples were studied to investigate the effect of mineral matter on transformation of sulfur during combustion by the combined of DTG and GC-MS,the flowmeter 50 mL/min,heating rate 20℃/min,oxygen volume percentage 20%.The SO₂ release curve of primitive micro-pulverized coal appear three peaks during the combustion,but the demineralized sample appear two peaks.The species of coal has effect on temperature of the maximum release rate of SO₂,the release rate of SO₂ of Hegang coal is even in three temperature ranges,Tiefa coal appear maximum value about 500℃ and Zhungeer coal about 200℃ which probably due to the different amount of all kinds of sulfur in primitive coal sample.The mineral matter（MgO、CaO、Al₂O₃ and Fe₃O₄） have sulfur retention and catalyzing effect on SO₂ the combustion of coal.The amount and species of mineral matter and species of coal determine the sulfur retention effect.更多还原