|本期目录/Table of Contents|

[1]陈龙,张嬿妮.氧浓度对煤低温氧化热效应影响规律研究[J].中国安全生产科学技术,2020,16(6):49-54.[doi:10.11731/j.issn.1673-193x.2020.06.008]
 CHEN Long,ZHANG Yanni.Study on influence laws of oxygen concentration on thermal effect of coal low-temperature oxidation[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(6):49-54.[doi:10.11731/j.issn.1673-193x.2020.06.008]
点击复制

氧浓度对煤低温氧化热效应影响规律研究
分享到:

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
16
期数:
2020年6期
页码:
49-54
栏目:
职业安全卫生管理与技术
出版日期:
2020-06-30

文章信息/Info

Title:
Study on influence laws of oxygen concentration on thermal effect of coal low-temperature oxidation
文章编号:
1673-193X(2020)-06-0049-06
作者:
陈龙张嬿妮
(1.中煤能源研究院有限责任公司,陕西 西安 710054;
2.西安科技大学 安全科学与工程学院,陕西 西安 710054)
Author(s):
CHEN Long ZHANG Yanni
(1.China Coal Energy Research Institute Co.,Ltd.,Xi'an Shaanxi 710054,China;
2.School of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an Shaanxi 710054,China)
关键词:
氧浓度低温氧化热效应煤自燃活化能
Keywords:
oxygen concentration low-temperature oxidation thermal effect coal spontaneous combustion activation energy
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2020.06.008
文献标志码:
A
摘要:
为了准确掌握氧浓度对煤低温氧化热效应的影响,采用C80微量量热仪研究低温阶段煤氧化的自热过程,根据单升温速率的非等温动力学分析方法,得到不同氧浓度下煤样的活化能。研究结果表明:氧浓度对实验初始阶段的热流曲线和放热量的影响较小,随着温度的升高,氧浓度对热流曲线和放热量影响逐渐变得明显,放热趋势随着氧浓度的增大而增强;煤样的初始放热温度随着氧浓度的增大而降低;活化能随着氧气浓度的降低呈阶梯式上升;总放热量和氧浓度服从线性方程y=ax+b;与21%(空气气氛)氧浓度相比,15%,10%和5%氧浓度下煤的放热量分别降低了约19%,33%和46%,表明降低氧浓度对煤样的氧化放热具有明显的减缓作用。因此可以加强采空区的密闭性检测、注入惰性气体,使采空区的氧浓度尽可能地低,对采空区煤自热升温的防治有着理论指导意义。
Abstract:
In order to accurately understand the influence of oxygen concentration on the thermal effect of coal low-temperature oxidation,the elfheating process of coal oxidation in the low-temperature stage was studied by using C80 micro-calorimeter.According to the non-isothermal kinetic analysis method of single heating rate,the activation energies of coal samples under different oxygen concentrations were obtained.The results showed that the influence of oxygen concentration on the heat flow curve and heat release amount in the initial stage of the experiment was small,while with the increase of temperature,the influence gradually became obvious,and the heat release trend strengthened with the increase of oxygen concentration.The initial exothermic temperature of coal samples decreased with the increase of oxygen concentration.The activation energy presented the stepped increase with the decrease of oxygen concentration.The total heat release amount and oxygen concentration were subject to the linear equation y=ax+b.Compared with the oxygen concentration of 21% (air atmosphere),the heat release amount of coal under the oxygen concentration of 15%,10% and 5% decreased by about 19%,33% and 46%,respectively,indicating that the reduction of oxygen concentration had significant alleviating effect on the oxidation heat release of coal samples.Therefore,the oxygen concentration in the goaf should be as low as possible by strengthening the airtightness detection of goaf and injecting into the inert gas,which has theoretical guiding significance for the prevention and control of spontaneous heating of coal in goaf.

参考文献/References:

[1]许涛.煤自燃过程分段特性及机理的实验研究[D].徐州:中国矿业大学,2012.
[2]ZHONG X X,KAN L,XIN H H,et al.Thermal effects and active group differentiation of low-rank coal during low-temperature oxidation under vacuum drying after water immersion[J].Fuel,2019,236:1204-1212.
[3]ZHANG Y L,WU J M,CHANG L P,et al.Kinetic and thermodynamic studies on the mechanism of low temperature oxidation of coal:a case study of Shendong coal[J].International Journal of Coal Geology,2013,120:41-49.
[4]曹凯,王德明.贫氧条件煤自燃产热特性试验研究[J].中国安全科学学报,2015,25(10):127-132. CAO Kai,WANG Deming.Experimental study on heat release characteristics of coal spontaneous combustion under oxygen depletion condition [J].China Safety Science Journal,2015,25(10):127-132.
[5]CHAO J N,YANG H R,WU Y X,et al.The investigation of the coal ignition temperature and ignition characteristics in an oxygen-enriched FBR[J].Fuel,2016,183:351-358.
[6]QI G S,WANG D M,ZHENG K M,et al.Kinetics characteristics of coal low-temperature oxidation in oxygen-depleted air[J].Journal of Loss Prevention in the Process Industries 2015,35:224-231.
[7]张嬿妮,张帆,邓军,等.不同煤层煤氧化自燃性实验分析[J].中国安全生产科学技术,2018,14(10):41-47. ZHNAG Yanni,ZHANG Fan,DENG Jun,et al.Experimental analysis on characteristics of oxidation and spontaneous combustion of coal in different coal seams [J].Journal of Safety Scienceand Technology,2018,14(10):41-47.
[8]GARCIA P,HALL P J,MONDRAGON F.The use of differential scanning calorimetry to identify coals susceptible to spontaneous combustion[J].Thermochimica Acta,1999,336(1-2):41-46.
[9]KALJUVEE T,KEELMAN M,TRIKKEL A,et al.TG-FTIR/MS analysis of thermal and kinetic characteristics of some coal samples[J].Journal of Thermal Analysis & Calorimetry,2013,113(3):1063-1071.
[10]董宪伟,艾晴雪,王福生,等.煤氧化阻化过程中的热特性研究[J].中国安全生产科学技术,2016,12(4):70-75. DONG Xianwei,AI Qingxue,WANG Fusheng,et al.Research on thermal characteristics in the process of coal oxidation inhibition[J].Journal of Safety Scienceand Technology,2016,12(4):70-75.
[11]赵婧昱.淮南煤氧化动力学过程及其微观结构演化特征研究[D].西安:西安科技大学,2017.
[12]DAOOD S S,MUNIR S,NIMMO W,et al.Char oxidation study of sugar cane bagasse,cotton stalk and Pakistani coal under 1% and 3% oxygen concentrations.[J].Biomass & Bioenergy,2010,34(3):263-271.
[13]陈金全,王继仁,岳立柱.基于偏序集的采空区煤自燃可能性评价模型[J].中国安全生产科学技术,2019,15(2):91-95. CHEN Jingquan,WANG Jiren,YUE Lizhu.Evaluation model on possibility of coal spontaneous combustion in goaf based on partially ordered set[J].Journal of Safety Science and Technology,2019,15(2):91-95.
[14]王福生,王建涛,顾亮,等.煤自燃预测预报多参数指标体系研究[J].中国安全生产科学技术,2018,14(6):47-53. WANG Fusheng,WANG Jiantao,GU Liang,et al.Study on multi-parameter index system for prediction and forecast of coal spontaneous combustion[J].Journal of Safety Science and Technology,2018,14(6):47-53.
[15]张嬿妮,陈龙,邓军,等.基于程序升温实验的同组煤氧化动力学分析[J].煤矿安全,2018,49(5):30-34. ZHNAG Yanni,CHEN Long,DENG Jun,et al.Oxidation kinetic analysis of the same group coal vased on programmed temperature[J].Safety in Coal Mines,2018,49(5):30-34.

相似文献/References:

[1]梁玉春.吸水性还原性材料对煤自燃影响的实验研究[J].中国安全生产科学技术,2019,15(3):44.[doi:10.11731/j.issn.1673-193x.2019.03.007]
 LIANG Yuchun.Experimental study on influence of material with water absorbability and reducibility on spontaneous combustion of coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(6):44.[doi:10.11731/j.issn.1673-193x.2019.03.007]
[2]段玉龙,王硕,王文和,等.呼吸效应对矿井封闭火区氧浓度的影响分析[J].中国安全生产科学技术,2020,16(4):101.[doi:10.11731/j.issn.1673-193x.2020.04.016]
 DUAN Yulong,WANG Shuo,WANG Wenhe,et al.Analysis on influence of respiratory effect on oxygen concentration in closed fire zone of mine[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2020,16(6):101.[doi:10.11731/j.issn.1673-193x.2020.04.016]

备注/Memo

备注/Memo:
收稿日期: 2020-01-08;网络首发日期: 2020-06-24
* 基金项目: 国家自然科学基金项目(5167041541 )
作者简介: 陈龙,硕士研究生,助理工程师,主要研究方向为煤自燃机理及灾害防治。
更新日期/Last Update: 2020-07-07