摘要
为了提高长烟煤的加工利用适用性,对东胜长焰煤在实验室经过低温干馏的方式进行热解提质,将残留物进行镜质体反射率与挥发分等分析测试,并与自然变质煤化下进行对比。研究发现,自然变质煤化和热解提质都显示随着镜质体平均最大反射率升高,挥发分产率成比例降低,但却有各自的斜率,热解提质线性方程的斜率比自然煤化的斜率大42%,表明热解提质时,镜质体反射率随挥发分产率降低而升高得更快;由于斜率不同,自然变质煤化和热解提质两条直线相交于镜质体最大反射率R;=1.3%、挥发分产率V;=25%左右的点;成煤时间、成煤物质、成煤环境,特别是温度-压力-水分这三者的耦合联系的不同,造成了自然变质煤与热解提质煤的煤岩组成和其相应的特性差异。分析认为,仅仅考虑镜质体最大反射率就决定如何用提质煤替代自然变质煤是不够的,还需要对提质煤的其他特性进行详细研究以提高其适用性。
In order to improve the applicability of processing and utilization of long flame coal, the long flame coal in Dongsheng mining area was pyrolyzed and upgraded by low-temperature dry distillation in the laboratory.At the same time, the vitrinite reflectance and volatile content of the residue were tested and compared with that of natural metamorphic coal.The research on natural metamorphic coalification and pyrolysis upgrading shows that with the increase of the average maximum reflectance of vitrinite, the volatile yield decreases in proportion;however, the slope of the linear equation of pyrolysis upgrading is 42% higher than that of natural coalification, indicating that the vitrinite reflectance increases faster with the decrease of volatile yield;due to the different slopes, the two straight lines of natural metamorphic coalification and pyrolysis upgrading intersect at the point where the maximum reflectance of vitrinite R;=1.3% and the volatile yield V;=25%;the different coupling relationship of coal-forming time, coal-forming material and coal-forming environment, especially temperature-pressure-moisture, results in the difference of coal-rock composition and corresponding characteristics of natural metamorphic coal and pyrolysis upgraded coal.The analysis shows that it is not enough to determine how to replace natural metamorphic coal with upgraded coal only by considering the maximum reflectance of vitrinite, and other characteristics of upgraded coal need to be studied in detail to improve its applicability.
作者
马青华
张学梅
李东
郝静远
MA Qinghua;ZHANG Xuemei;LI Dong;HAO Jingyuan(Energy&Chemical Engineering Research Center,Xi’an Siyuan University,Xi’an 710038,China;College of Chemical Engineering,Xi’an Jiaotong University,Xi’an 710038,China)
出处
《陕西煤炭》
2022年第2期46-49,62,共5页
Shaanxi Coal
基金
陕西省教育厅2020年度一般专项科学研究计划(20JK0858)。
关键词
长焰煤
热解提质
自然变质煤
镜质体反射率
挥发分产率
long flame coal
pyrolysis upgrading
natural metamorphic coal
vitrinite reflectance
volatile matter yield
作者简介
马青华(1991-),男,陕西榆林人,助教,主要从事煤炭高效清洁利用方面的研究。
