不同因素对煤吸氧量、热焓影响的试验研究  

Experimental Study on Effects of Different Factors on Coal Oxygen Absorption and Enthalpy

作　　者：朱红青[1] 屈丽娜[1] 沈静[1] 和超楠[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院

出　　处：《中国安全科学学报》2012年第10期30-35,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51074168)

摘　　要：为研究升温速率、氧气浓度、粒度等因素对煤吸氧量、热焓值的影响规律,基于热重-差示扫描量热法(TG-DSC)试验,考察1—5号煤样在程序升温过程中,其TG曲线的质量增重情况(即煤吸氧量)及DSC曲线中煤热焓值的变化规律。试验结果表明:随着升温速率增大,煤吸氧量逐渐减小并与之呈指数关系,而热焓值则呈先减小后增大的趋势;氧气浓度越大,煤吸氧量先减小后增大,而热焓值则先增大后减小,在氧气体积分数为12%时吸氧量最小而热焓值最大;粒度越大,煤吸氧量越大,而热焓值则先增大后减小且在140～160目时达到最大。In order to study effects of different factors （heating rate, granularity, oxygen concentration） on coal oxygen absorption, coal enthalpy, based on the experimental of TG-DSC to research their variations on the TG curves of quality weight gain （that is coal oxygen absorption） and DSC curves of coal enthalpy size by the coal samples of temperature-programmed from No. 1 to No. 5. The experimental results showed that： with heating rate increases, the coal oxygen absorption is decreased gradually, and it exists exponen- tial relationship with the coal oxygen absorption, but the trend of thermal enthalpy is first decreased and then increased; With the oxygen concentration increased, the coal oxygen absorption is first decreased and then increased, but the thermal enthalpy is first increased and then decreased, when the oxygen volume fraction is 12% ,the coal oxygen absorption is minimum but the thermal enthalpy is maximum; The larger granularity, the greater coal oxygen absorption, however, the thermal enthalpy is increased first and then decreased, when the granularity is 140 -160 mesh, the thermal enthalpy is maximum. The experimental results reveal the influence of different factors on coal oxygen absorption and enthalpy value.

关 键 词：煤吸氧(Q) 热焓 升温速率 粒度 氧体积分数 

分 类 号：X936[环境科学与工程—安全科学]