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褐煤与木屑及在250℃/30 min的条件下烘焙后的木屑进行不同比例的掺混,分别通过热重分析仪和900℃高温热解研究其共热解特性。研究表明,木屑通过烘焙后,初始热解温度升高,热解剩余物增加,更接近褐煤;褐煤掺混的热重分析过程中,两种木屑的添加有利于提高反应物的转化率,但木屑的作用更强;与褐煤的高温共热解过程中,两种木屑的添加有利于提高气体和液体产物产量,烘焙木屑比木屑更有利于气体产生,而木屑更有利于液体产生;两种木屑的添加还有利于H2的产生,但木屑的作用更明显;烘焙木屑和褐煤共热解与两种物质单独热解焦油成分对比得出,共热解有利于使焦油成分变的简单,烘焙木屑与木屑单独热解焦油成分对比得出,烘焙过程可有效减少焦油中的物质。
Lignite and sawdust and sawdust after baking at 250 ℃ / 30 min were blended with different proportions, and their pyrolysis characteristics were investigated by TG and 900 ℃ pyrolysis respectively. The results show that after the wood chips are baked, the initial pyrolysis temperature increases and the pyrolysis residue increases, which is closer to lignite. During the thermogravimetric analysis of lignite blending, the addition of two kinds of wood chips is helpful to improve the conversion rate of reactants, The effect of sawdust is stronger; during the high-temperature co-pyrolysis of lignite, the addition of two kinds of sawdust helps to increase the output of gas and liquid products, and the baking of sawdust is more conducive to gas production than sawdust, while the sawdust is more conducive to liquid production; The addition of sawdust is also beneficial to the production of H2, but the effect of sawdust is more obvious. The comparison of the total pyrolysis of baking chips and lignite with that of two pyrolysis tar separately shows that the pyrolysis helps to make the composition of the tar simple and the baking The comparison between sawdust and sawdust alone shows that the baking process can effectively reduce tar in the material.