复合高吸水性树脂对煤自燃的抑制性能研究

Research on inhibition of coal spontaneous combustion by composite superabsorbent resin

针对现有矿用防灭火阻化材料存在流动性差、灭火效果不理想、成本高等问题,采用水溶液聚合法合成无机黏土复合高吸水性树脂,对其进行结构表征和热稳定性测定,并结合煤自燃升温过程对其阻化性能进行研究。红外光谱测试及热稳定性分析结果表明,制备的复合高吸水性树脂具有高吸水性特征的主要官能团,热稳定性高。采用CaCl2、抗坏血酸、复合高吸水性树脂3种阻化剂对煤样进行阻化处理,并对阻化后的煤样进行氧化动力学和指标性气体测试,结果表明,相比原煤、CaCl2溶液和抗坏血酸阻化的煤样,煤样温度达到70℃时复合高吸水性树脂阻化煤样氧消耗量最小,交叉点温度最高,产生CO和CO2所需的初始温度更高,说明复合高吸水性树脂对煤自燃的抑制效果更好。

In view of problems of poor fluidity,unsatisfactory fire-extinguishing effect and high cost of existing mine-used anti-fire extinguishing resistant material,inorganic clay composite superabsorbent resin was synthesized by aqueous solution polymerization method,and its structural characterization and thermal stability were measured.The resistive properties were studied combined with heating process of coal spontaneous combustion.The results of infrared spectrum and thermal stability analysis show that the prepared composite superabsorbent resin has main functional group with high water absorption characteristics and high thermal stability.The coal samples were treated with CaCl 2,ascorbic acid and composite superabsorbent resin to resist the oxidation,and the oxidation kinetics and index gas tests were carried out on the coal samples after the inhibition.The results show that compared with the raw coal,CaCl 2 and ascorbic acid resistant coal sample,composite superabsorbent resin resistant coal sample has the smallest oxygen consumption when the temperature of coal sample reaches 70 °C,and its intersection temperature is the highest,the initial temperature required to produce CO and CO 2 is higher,which indicates that the composite superabsorbent resin has better inhibition effect on coal spontaneous combustion.