CAJ | 학술논문

利用热重分析的方法对含油污泥、煤及其混合试样的挥发分析出特性进行研究,分析了含油污泥、煤的混合比例及升温速率对含油污泥-煤混合热解过程的化学动力学参数和挥发分析出特性参数的影响规律.实验结果表明,随着混合试样中含油污泥含量的增加,挥发分析出份额越大,混合试样总失重量增加;混合试样的热解反应整体活化能要小于两种单一组分;煤中加入少量的含油污泥就可以使挥发分初析温度显著降低,挥发分析出的温度区间在含油污泥质量分数为33%左右时达到最大;当混合试样中含油污泥质量分数超过33%时,挥发分析出高峰时的温度接近含油污泥,且挥发分最大析出速度、挥发分析出特性指数随含油污泥含量的增加而增大,增加含油污泥对混合试样挥发分的析出有明显的促进作用;在10~30,℃/min 的变化范围内,热解曲线随升温速率的增大向高温方向偏移,挥发分析出特性指数随升温速率的增加略有增大,升温速率的增大对于挥发分的析出略有促进作用.
이용열중분석적방법대함유오니、매급기혼합시양적휘발분석출특성진행연구,분석료함유오니、매적혼합비례급승온속솔대함유오니-매혼합열해과정적화학동역학삼수화휘발분석출특성삼수적영향규률.실험결과표명,수착혼합시양중함유오니함량적증가,휘발분석출빈액월대,혼합시양총실중량증가;혼합시양적열해반응정체활화능요소우량충단일조분;매중가입소량적함유오니취가이사휘발분초석온도현저강저,휘발분석출적온도구간재함유오니질량분수위33%좌우시체도최대;당혼합시양중함유오니질량분수초과33%시,휘발분석출고봉시적온도접근함유오니,차휘발분최대석출속도、휘발분석출특성지수수함유오니함량적증가이증대,증가함유오니대혼합시양휘발분적석출유명현적촉진작용;재10~30,℃/min 적변화범위내,열해곡선수승온속솔적증대향고온방향편이,휘발분석출특성지수수승온속솔적증가략유증대,승온속솔적증대대우휘발분적석출략유촉진작용.
The release characteristics of volatiles are studied by thermogravimetric analysis. The volatiles come from the pyrolysis of oily sludge,coal and their mixture. The effect of mixing ratio and heating rate on the corresponding chemical kinetic parameters and the release characteristics of the volatiles is analyzed. The experimental results show that the release of the volatiles increases with the increased content of oily sludge in the mixture,leading to the in-crement of overall mass loss;the release characteristics of volatiles arising from the pyrolysis of the mixture are much better than those from the individual components;the initial release temperature of volatiles will decrease obviously when a little oily sludge is added to the coal,and the release temperature range of volatiles will reach the maximum when the mass fraction of oily sludge is about 33%;if the content of oily sludge in the mixture is above 33%,the re-lease peak temperature of the volatiles from the mixture is approximate to that from oily sludge,and meanwhile,the maximum release rate and the release characteristic index of volatiles increase with the increased content of oily sludge in the mixture,indicating that oily sludge can significantly promote the release of volatiles from the mixture;within the range from 10,℃/min—30,℃/min,the pyrolysis process shifts to the high temperature direction with the increased heating rate,suggesting that the increment of heating rate can slightly facilitate the release of volatiles. Hence,the addition of oily sludge to clean coal can improve the release characteristics of volatiles from clean coal.