Experimental Study on the Effect of Chemical Composite Additives on Heat Release Characteristics of Coal Oxidation Spontaneous Combustion

Pan Rongkun; Ma Junwei; Wu Shuaidong; Tang Wentao; Yu Minggao; Jia Hailin

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Experimental Study on the Effect of Chemical Composite Additives on Heat Release Characteristics of Coal Oxidation Spontaneous Combustion

机译：化学复合添加剂对煤氧化自燃燃热特性影响的实验研究

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To study the effect of chemical composite additives (CCAs) on the heat release characteristics of coal oxidation spontaneous combustion, this paper develops a CCA comprising multiple chemical reagents that is formulated into different concentrations and used to treat coal samples. Microcalorimetry technology with high precision and high sensitivity was used in this experimental research. The heat release parameters of the oxidation of different treated coal samples were obtained and compared by varying the heating rate. The experimental results show that the general trend for coal is first absorbing heat and then releasing heat with increasing temperature, and there is a "step-like" trend in the heat releasing stage. For the same heating rate, water treatment and CCA treatment delay the temperature increase in the coal in the heat absorbing stage, and in the heat releasing stage, water treatment increases the heat release rate and maximum heat flow. CCA treatment decreases the heat release parameters value of the oxidation of coal, and the effect is increased with the increasing CCA concentration. The thermal analysis kinetics method was used to study the coal oxidation reaction. CCA treatment can increase the activation energy of coal, increase the difficulty of reaction process and reduce the heat release rate, which has an inhibitory effect on the spontaneous combustion of coal. Increasing the heating rate can accelerate the reaction rate of the system, resulting in an increase in the spontaneous combustion tendency of coal.

机译：为研究化学复合添加剂（CCAS）对煤氧化自发燃烧的散热特性的影响，本文发展了包含多种化学试剂的CCA，该化学试剂配制成不同浓度并用于治疗煤样品。在该实验研究中使用了具有高精度和高灵敏度的微量微量微量化技术。获得并通过改变加热速率来获得不同处理的煤样的氧化的热释放参数。实验结果表明，煤的一般趋势首先吸收热量，然后释放热量，随着温度的增加，散热阶段的“阶梯状”趋势。对于相同的加热速率，水处理和CCA处理延迟煤中煤中的温度增加，在散热阶段，水处理增加了散热速率和最大热流。 CCA处理降低了煤的氧化的热释放参数值，随着CCA浓度的增加而增加。热分析动力学方法用于研究煤氧化反应。 CCA治疗可以增加煤的活化能量，增加反应过程的难度并降低散热速率，对煤的自发燃烧具有抑制作用。增加加热速率可以加速系统的反应速率，导致煤的自发燃烧趋势增加。

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来源
《Combustion Science and Technology》 |2021年第4期|561-576|共16页
作者
Pan Rongkun; Ma Junwei; Wu Shuaidong; Tang Wentao; Yu Minggao; Jia Hailin;
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作者单位

Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China|Henan Polytech Univ Collaborat Innovat Ctr Coal Safety Prod Henan Pro Jiaozuo Henan Peoples R China|Henan Key Lab Prevent & Cure Mine Methane & Fires Jiaozuo Henan Peoples R China;

Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China;

Yima Coal Ind Grp Co Ltd Sanmenxia Peoples R China;

Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China;

Chongqing Univ State Key Lab Coal Mine Disaster Dynam & Control Chongqing 400044 Peoples R China;

Henan Polytech Univ Dept Safety & Sci Engn Jiaozuo 454003 Henan Peoples R China|Henan Polytech Univ Collaborat Innovat Ctr Coal Safety Prod Henan Pro Jiaozuo Henan Peoples R China|Henan Key Lab Prevent & Cure Mine Methane & Fires Jiaozuo Henan Peoples R China;

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正文语种 eng
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关键词
Coal oxidation spontaneous combustion; chemical composite additive; heating rate; heat release characteristics; thermal analysis kinetics;

机译：煤氧化自发燃烧;化学复合添加剂;加热速率;热释放特性;热分析动力学;

Experimental Study on the Effect of Chemical Composite Additives on Heat Release Characteristics of Coal Oxidation Spontaneous Combustion

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