基于等效氧化暴露时间理论的褐煤自燃特性研究

Hemeng Zhang, Xiaoming Zhang, Yongjun Wang, Jiren Wang, Kyuro Sasaki

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

Spontaneous combustion of stockpiled coal can occur under some appropriate circumstances.The open-ended isothermal method was used to investigate the characteristic parameters of lignite,such as the critical self-ignition temperature (Tc) and apparent activation energy of the cube lignite sample of different size (0.05,0.1,0.15 and 0.25 m in side length).Multi-fields coupling mathematical model of homogeneous porous media was developed based on the theory of equivalent oxidation exposure time (EOET) and applied to simulate the self-combustion process of lignite.Thereby the dynamic distribution of temperature,oxygen concentration and seepage field were analyzed systematically.Heating process of lignite sample in the experiment can be divided into four stages,which are rapid heating stage,slow heating stage,temperature rebounding stage and self-heating stage respectively.Coupling mechanism of heat generation transfer,water evaporation and migration,oxygen consumption and migration and natural convection of coal sample was investigated through combined experiment and simulation.Relationship between relative EOET and heat generation acceleration rate was demonstrated to be a negative correlation.Critical self-ignition temperatures of large-scale coal stockpiles for numerical simulation were in close agreement with the prediction values of empirical function.

寄稿の翻訳タイトルStudy on spontaneous combustion of lignite based on the theory of equivalent oxidation exposure time
本文言語中国語
ページ(範囲)1358-1364
ページ数7
ジャーナルMeitan Xuebao/Journal of the China Coal Society
43
5
DOI
出版ステータス出版済み - 5 1 2018

All Science Journal Classification (ASJC) codes

  • 燃料技術
  • 地盤工学および土木地質学
  • エネルギー工学および電力技術
  • 機械工学
  • 電子工学および電気工学

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