利用锥形量热仪多角度实验模拟研究阻化剂对煤升温氧化的影响,在实验过程中运用锥形量热仪对添加两种阻化剂的煤样自燃特性进行分析,考察了添加原有煤样和氯化镁、防老剂两种常用阻化剂后的点燃时间、热释放速率,CO产生率对煤自燃特性的影响。结果表明:MgCl2阻化煤样的引燃时间最长为369s,热释放速率最小;MgCl2阻化煤样的CO产率在燃烧中期很大,防老剂阻化煤样的CO产率在后期较大;MgCl2阻化煤样的比消光面积最小,防老剂阻化煤样的比消光面积在前期较大,在后期逐渐减小。研究表明:同一阻化煤样对于不同的实验参数其影响不完全一致;MgCl2对煤样的阻化效果最好,防老剂在后期有较好的阻化效果。
The effect of the inhibitors on the temperature oxidation of coal was studied by cone calorimeter multi-angle experiments.The results maybe helpful in choosing of the coal inhibitor.Effects on coal ignition time;heat release rate and CO2 production rate of the inhibitor of MgCl2 and water-absorbent resin were investigated.The results showed that inhibited coal adding MgCl2 has the longest ignition time that can be up to 369s,and has the least heat release rate;Inhibited coal adding MgCl2 in the middle period of combustion has the highest CO release rate;Inhibited coals adding antioxidant in the later period of combustion,have larger CO release rate;Inhibited coal adding MgCl2 has the least specific extinction area;Inhibited coals adding antioxidant has larger specific extinction area in the prior period and diminish in the later period.The study indicates that the same inhibited coal sample has not identical effect with different experiment parameter;MgCl2 has the best effect on inhibiting coal oxidation;antioxidant has greater effect on inhibiting coal oxidation in the later stages.