摘要
为掌握不同体积分数CO_(2)对氧化煤复燃过程的抑制效果,采用自主研制的煤自燃氧化程序升温试验装置,对平煤八矿煤样分别通入体积分数为10%、20%、30%和40%的CO_(2)进行试验研究,测定了煤初次和二次氧化升温过程中的耗氧速率、CO产生率以及表观活化能的变化规律。结果表明:与煤在纯空气条件下的氧化自燃相比,不同体积分数的CO_(2)对煤氧化升温过程均具有抑制作用。同时,通入的CO_(2)体积分数越大,煤初次和二次氧化升温过程的耗氧速率和CO产生率越低,表观活化能越高,即CO_(2)的体积分数越大,对氧化煤复燃过程的抑制效果越好。
In order to master the fire-extinguishing efficiency of different concentrations of CO_(2) on the oxidized coal re-combustion,a self-developed coal spontaneous oxidation program temperature increasing experimental device was adopted to study the inhibitory effect of CO_(2) on coal oxidation and heating process,and the samples of Pingdingshan No.8 Coal Mine were fed with CO_(2) concentrations of 10%,20%,30%and 40%respectively.The oxygen consumption rate,the production rate of CO and the change law of apparent activation energy of coal were measured,and the result shows that different volume fractions of CO_(2) have inhibitory effects on the heating process of coal oxidation.The results show that different volume fractions of CO_(2) have an inhibitory effect compared with the oxidation under pure air conditions.At the same time,the larger the volume fraction of CO_(2) introduced,the lower the oxygen consumption and CO generation rate both the primary and secondary coal oxidation process,while the higher the apparent activation energy.That is to say,the larger the volume of CO_(2),the better the inhibition efficiency of the re-combustion process of oxidized coal.
作者
郭志国
王蓉
张俊
陈荣芳
周令剑
Guo Zhiguo;Wang Rong;Zhang Jun;Chen Rongfang;Zhou Lingjian(School of Resources and Environment Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China;State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei Anhui 230026,China)
出处
《矿业科学学报》
CSCD
2021年第2期160-165,共6页
Journal of Mining Science and Technology
基金
国家自然科学基金青年基金(51904120)
江西省教育厅科学技术青年基金(GJJ180473)
江西理工大学博士启动基金(jxxjbs18034)
国家级大学生创新创业训练计划(201910407002)。
关键词
CO_(2)
氧化煤燃烧
标志性气体
表观活化能
抑制效能
CO_(2)
oxidized coal combustion
index gas
apparent activation energy
fire-extinguishing effectiveness
