基于等效氧化暴露时间理论的褐煤自燃特性研究

Translated title of the contribution: Study on spontaneous combustion of lignite based on the theory of equivalent oxidation exposure time

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

Research output: Contribution to journalArticle

Abstract

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.

Original languageChinese
Pages (from-to)1358-1364
Number of pages7
JournalMeitan Xuebao/Journal of the China Coal Society
Volume43
Issue number5
DOIs
Publication statusPublished - May 1 2018

Fingerprint

Spontaneous combustion
Lignite
lignite
combustion
heating
oxidation
Oxidation
Heat generation
Coal
coal
Heating
Ignition
temperature
Temperature
Oxygen
Industrial heating
Seepage
oxygen consumption
Natural convection
activation energy

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

基于等效氧化暴露时间理论的褐煤自燃特性研究. / Zhang, Hemeng; Zhang, Xiaoming; Wang, Yongjun; Wang, Jiren; Sasaki, Kyuro.

In: Meitan Xuebao/Journal of the China Coal Society, Vol. 43, No. 5, 01.05.2018, p. 1358-1364.

Research output: Contribution to journalArticle

Zhang, Hemeng ; Zhang, Xiaoming ; Wang, Yongjun ; Wang, Jiren ; Sasaki, Kyuro. / 基于等效氧化暴露时间理论的褐煤自燃特性研究. In: Meitan Xuebao/Journal of the China Coal Society. 2018 ; Vol. 43, No. 5. pp. 1358-1364.
@article{09f5d271c20c4bf7b9b596285780b76f,
title = "基于等效氧化暴露时间理论的褐煤自燃特性研究",
abstract = "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.",
author = "Hemeng Zhang and Xiaoming Zhang and Yongjun Wang and Jiren Wang and Kyuro Sasaki",
year = "2018",
month = "5",
day = "1",
doi = "10.13225/j.cnki.jccs.2017.1170",
language = "中国語",
volume = "43",
pages = "1358--1364",
journal = "Meitan Xuebao/Journal of the China Coal Society",
issn = "0253-9993",
publisher = "China Coal Society",
number = "5",

}

TY - JOUR

T1 - 基于等效氧化暴露时间理论的褐煤自燃特性研究

AU - Zhang, Hemeng

AU - Zhang, Xiaoming

AU - Wang, Yongjun

AU - Wang, Jiren

AU - Sasaki, Kyuro

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85053613432&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053613432&partnerID=8YFLogxK

U2 - 10.13225/j.cnki.jccs.2017.1170

DO - 10.13225/j.cnki.jccs.2017.1170

M3 - 記事

AN - SCOPUS:85053613432

VL - 43

SP - 1358

EP - 1364

JO - Meitan Xuebao/Journal of the China Coal Society

JF - Meitan Xuebao/Journal of the China Coal Society

SN - 0253-9993

IS - 5

ER -