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利用综合热分析仪在O_2/CO_2(纯O_2、纯CO_2、O_2/CO_2=1∶4、O_2/CO_2=5∶5、O_2/CO_2=4∶1)气氛条件下对胜利煤、生物质(沙柳)以及二者以不同比例(煤:沙柳=1∶4、煤:沙柳=5∶5、煤:沙柳=4∶1)混合后的试样进行了TG/DTG分析,结果表明:煤、沙柳及二者的混合物的燃烧特性参数随氧气浓度及其掺混比例的变化表现出一定的规律性,含氧量≥50%的样品的燃烧机理为多相燃烧,含氧量≤20%的样品的燃烧机理为均相燃烧。沙柳与煤的混合物在不同热解区间有不同程度的相互协同/抑制作用,其中沙柳含量为20%、含氧量为80%气氛条件下的沙柳和煤的混合物的相互协同性最好,纯O_2气氛下的混合物的相互抑制性最好。本研究的创新之处在于研究不同O_2/CO_2气氛下对生物质与煤混合物的共燃烧进行燃烧特性指数的分析及二者的相互作用。通过确定合理的生物质和煤以及O_2/CO_2气氛的混合比例可确保在共热解过程中生物质与煤的协同效果最佳,研究生物质和煤的燃烧特性及协同/抑制作用可为煤和生物质的有效洁净利用及降低环境污染起到积极的作用。
Using a comprehensive thermal analysis instrument, the chemical composition of Shengli coal, biomass (O 2 / CO 2, O 2 / CO 2 = 1:5, O 2 / CO 2 = Salix miltiorrhiza and Salix miltiorrhiza), and the TG / DTG analysis of the samples with different ratios (coal: Salix = 1: 4, coal: Salix = 5: 5, coal: Salix = 4: 1) The results showed that the combustion parameters of coal, Salix and their mixtures showed certain regularity with the changes of oxygen concentration and blending ratio. The combustion mechanism of the samples containing more than 50% oxygen was multi-phase combustion, The combustion mechanism of the sample with the volume less than or equal to 20% was homogeneous combustion. The mixture of Salix psammophila and coal has different degrees of mutual synergism / inhibition in different pyrolysis sections. The mixture of Salix psammophila and coal has the most synergistic effect when Salix psammophylla content is 20% and the oxygen content is 80% Good, the mixture of pure O2 atmosphere mutual inhibition of the best. The innovation of this study is to study the combustion characteristics index of co-combustion of biomass and coal mixture under different atmosphere of O 2 / CO 2 and their interaction. The synergistic effect between biomass and coal during co-pyrolysis can be ensured by determining the reasonable mix of biomass and coal and O 2 / CO 2 atmosphere, and the combustion characteristics and synergistic / inhibitory effects of biomass and coal can be coal and Effective and clean use of biomass and reduce environmental pollution play a positive role.