不同注气压力下燃煤电厂烟气驱替煤层瓦斯研究

doi:10.16265/j.cnki.issn1003-3033.2025.11.2963

中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (11): 65-71.doi: 10.16265/j.cnki.issn1003-3033.2025.11.2963

不同注气压力下燃煤电厂烟气驱替煤层瓦斯研究

白刚¹^,²(), 王学鹏¹^,², 苏俊¹^,², 刘正东³, 李金雨¹, 范超军⁴

¹ 辽宁工程技术大学安全科学与工程学院,辽宁葫芦岛 125000
² 辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室,辽宁葫芦岛 125000
³ 东北大学资源与土木工程学院,辽宁沈阳 110819
⁴ 辽宁工程技术大学矿业学院,辽宁阜新 123000

收稿日期:2025-06-10 修回日期:2025-09-15 出版日期:2025-11-28
作者简介:
白刚教授 (1991—),男,安徽灵璧人,博士,教授,主要从事矿山灾害低碳防控理论与技术研究。E-mail:baigang_1992@163.com。
刘正东副教授。
李金雨副教授。
范超军教授。
基金资助:
国家自然科学基金资助(52274204); 国家自然科学基金资助(52104195); 国家自然科学基金资助(52074147); 中国科协青年人才托举工程项目(2022QNRC001)

Study on coal bed gas displacement by flue gas in coal-fired power plants under different gas injection factors

BAI Gang¹^,²(), WANG Xuepeng¹^,², SU Jun¹^,², LIU Zhengdong³, LI Jinyu¹, FAN Chaojun⁴

¹ College of Safety Science & Engineering, Liaoning Technical University, Huludao Liaoning 125000, China
² Key Laboratory of Mine Thermodynamic Disasters & Control of Ministry of Education, Liaoning Technical University, Huludao Liaoning 125000, China
³ School of Resources and Civil Engineering, Northeastern University, Shenyang Liaoning 110819, China
⁴ College of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China

Received:2025-06-10 Revised:2025-09-15 Published:2025-11-28

摘要/Abstract

摘要： 为提高瓦斯抽采效率,采用数值模拟方法,分析不同注气压力下气体体积分数、气体突破时间、煤层渗透率、CH₄抽采速率及抽采量变化特征。结果表明:注烟气后CH₄体积分数呈下降趋势,CO₂、N₂、O₂体积分数呈上升趋势,注气压力升高会缩短烟气各气体的突破时间、降低煤层渗透率以及提高瓦斯抽采量。在抽采180天时,注气压力由0.5 MPa增加至2.5 MPa,煤层渗透率由8.722 7×10^-17 m²降低至8.711 5×10^-17m²、抽采量由449.01 m³增加至715.30 m³。瓦斯抽采速率呈现上升-下降-上升-下降的变化特征,从注气压力对抽采的影响上看,注气压力对于前2个阶段抽采影响较小。

关键词: 注气压力, 电厂烟气, 煤层瓦斯, 瓦斯抽采, 突破时间, 煤层渗透率

Abstract:

In order to improve the efficiency of gas extraction, numerical simulation methods were employed to analyze the characteristics of changes in gas volume fraction, gas breakthrough time, coal permeability, CH₄ extraction rate, and extraction quantity under different gas injection pressures. The results show that after flue gas injection, the volume fraction of CH₄ shows a downward trend, while the volume fractions of CO₂, N₂ and O₂ show an upward trend. The increase in injection pressure will shorten the breakthrough time of each gas in the flue gas, reduce the permeability of the coal seam and increase the gas extraction volume. At 180 days of extraction, the gas injection pressure increased from 0.5 MPa to 2.5 MPa, the coal seam permeability decreased from 8.722 7×10^-17 m² to 8.711 5×10^-17 m², and the extraction volume increased from 449.01 m³ to 715.30 m³. The gas drainage rate shows the variation characteristics of rising - falling - rising - falling. From the perspective of the influence of gas injection pressure on drainage, the gas injection pressure has a relatively small impact on the drainage in the first two stages.

Key words: injection pressure, power plant flue gas, CH₄ extraction, coalbed methane, gas pressure, gas drainage volume

中图分类号:

X936

白刚, 王学鹏, 苏俊, 刘正东, 李金雨, 范超军. 不同注气压力下燃煤电厂烟气驱替煤层瓦斯研究[J]. 中国安全科学学报, 2025, 35(11): 65-71.

BAI Gang, WANG Xuepeng, SU Jun, LIU Zhengdong, LI Jinyu, FAN Chaojun. Study on coal bed gas displacement by flue gas in coal-fired power plants under different gas injection factors[J]. China Safety Science Journal, 2025, 35(11): 65-71.

图/表 13

图1

图2

图3

图4

表1

表2

图5

表3

表4

图6

图7

表5

图8

参考文献 19

[1]	LI Guibo, FENG Zengchao, WANG Yanqi, et al. Research on different gas extraction methods of high gas and low permeability coal seam[J]. Chinese Journal of Underground Space and Engineering, 2015, 11(5):1362-1366.
[2]	姜延航, 白刚, 周西华, 等. 煤层注CO₂驱替 CH₄ 影响因素试验研究[J]. 中国安全科学学报, 2022, 32(4):113-121. doi: 10.16265/j.cnki.issn1003-3033.2022.04.017
	JIANG Yanhang, BAI Gang, ZHOU Xihua, et al. Experimental study on influence factors of CH₄ displacement by CO₂[J]. China Safety Science Journal, 2022, 32(4): 113-121. doi: 10.16265/j.cnki.issn1003-3033.2022.04.017
[3]	袁亮, 薛俊华, 张农, 等. 煤层气抽采和煤与瓦斯共采关键技术现状与展望[J]. 煤炭科学技术, 2013, 41(9):6-11,17.
	YUAN Liang, XUE Junhua, ZHANG Nong, et al. Current situation and prospect of key technologies for coalbed methane extraction and coal and gas co-production[J]. Coal Science and Technology, 2013, 41(9):6-11,17.
[4]	国家统计局. 中华人民共和国2020年国民经济和社会发展统计公报[N]. 人民日报, 2021-03-01(010).
[5]	黄戈. 电厂烟气注入采空区对遗煤自燃影响的数值模拟研究[D]. 葫芦岛: 辽宁工程技术大学, 2016.
	HUANG Ge. Numerical simulation of effect of flue gas injection into gob of power plant on spontaneous combustion of abandoned coal[D]. Huludao: Liaoning Technical University, 2016.
[6]	JIANG Kai, ASHWORTH P. The development of carbon capture utilization and storage (CCUS) research in China: a bibliometric perspective[J]. Renewable and Sustainable Energy Reviews, 2021, 138: DOI:10.1016/j.rser.2020.110521.
[7]	FU Lipei, REN Zhangkun, SI Wenzhe, et al. Research progress on CO₂ capture and utilization technology[J]. Journal of CO₂ Utilization, 2022,66: DOI:10.1016/J.ENERGY.2023.126664.
[8]	YU Wu, LIU Jishan, CHEN Zhongwei, et al. A dual poroelastic model for CO₂-enhanced coal bed methane recovery[J]. International Journal of Coal Geology, 2011, 86(2/3):177-189. doi: 10.1016/j.coal.2011.01.004
[9]	DUTKA B, KUDASIK M, POKRYSZKA Z, et al. Balance of CO₂/CH₄ exchange sorption in acoal briquette[J]. Fuel Processing Technology, 2013, 106: 95-101. doi: 10.1016/j.fuproc.2012.06.029
[10]	FANG Huihuang, SANG Shuxun, LIU Shiqi. Establishment of dynamic permeability model of coal reservoir and its numerical simulation during the CO₂-ECBM process[J]. Journal of Petroleum Science and Engineering, 2019, 179: 885-898. doi: 10.1016/j.petrol.2019.04.095
[11]	FAN Yongpeng, DENG Cunbao, ZHANG Xun, et al. Numerical study of CO₂-enhanced coalbed methane recovery[J]. International Journal of Greenhouse Gas Control, 2018, 76: 12-23. doi: 10.1016/j.ijggc.2018.06.016
[12]	FAGHIHI S, MOGHADASI J, JAMIALAHMADI M. Continuous CO₂ injection for simultaneous geological storage and enhanced oil recovery: experimental investigation on the effects of permeability heterogeneity[J]. Greenhouse Gases: Science and Technology, 2025, 15(4):458-471. doi: 10.1002/ghg3.v15.4
[13]	JESSEN K, TANG G Q, KOVSCEK A R. Laboratory and simulation investigation of enhanced coalbed methane recovery by gas injection[J]. Transport in Porous Media, 2008, 73(2):141-159. doi: 10.1007/s11242-007-9165-9
[14]	AKASH T, SUBASIS H, INAN A C. Enhancing coal bed methane recovery: using injection of nitrogen and carbon dioxide mixture[J]. Petroleum Science and Technology, 2021, 39(2):49-62. doi: 10.1080/10916466.2020.1831533
[15]	FAN Nan, WANG Jiren, DENG Cunbao, et al. Numerical study on enhancing coalbed methane recovery by injecting N₂/CO₂ mixtures and its geological significance[J]. Energy Science & Engineering, 2020, 8(4):1104-1119. doi: 10.1002/ese3.v8.4
[16]	ZHOU Lijun, ZHOU Xihua, FAN Chaojun, et al. Modelling of flue gas injection promoted coal seam gas extraction incorporating heat-fluid-solid interactions[J]. Energy, 2023, 268: DOI:10.1016/J.ENERGY.2023.126664.
[17]	季鹏飞, 林海飞, 孔祥国, 等. 注氮促排煤体瓦斯数值模拟研究[J]. 中国安全科学学报, 2021, 31(11):127-134. doi: 10.16265/j.cnki.issn 1003-3033.2021.11.018
	JI Pengfei, LIN Haifei, KONG Xiangguo, et al. Numerical simulation research on coal gas drainage by nitrogen injection[J]. China Safety Science Journal, 2021, 31(11): 127-134. doi: 10.16265/j.cnki.issn 1003-3033.2021.11.018
[18]	FAN Chaojun, ELSWORTH D, LI Sheng, et al. Thermo-hydro-mechanical-chemical couplings controlling CH₄ production and CO₂ sequestration in enhanced coalbed methane recovery[J]. Energy, 2019, 173: 1054-1077. doi: 10.1016/j.energy.2019.02.126
[19]	BAI Gang, WANG Xuepeng, WANG Jue, et al. Heat-fluid-solid-coupled model for flue gas displacement of CH₄ in coal seams and its applications[J]. ACS Omega, 2025, 10(2):2338-2353. doi: 10.1021/acsomega.4c10428 pmid: 39866620

条件	固体变形	流体边界	温度边界
边界EF	15 MPa	零通量	零通量
边界EG	辊支撑	零通量	零通量
边界FH	辊支撑	零通量	零通量
边界GH	固定约束	零通量	零通量
抽采孔	自由边界	86kPa	自由边界
注气孔	自由边界	狄式条件	狄式条件

压力/ MPa	抽采总量/ m³(60 d)	抽采总量/ m³(120 d)	抽采总量/ m³(180 d)
0.5	123.37	300.55	449.01
1.0	134.08	336.93	509.98
1.5	155.97	390.28	586.47
2.0	168	429.11	650.46
2.5	177.67	464.76	715.30

不同注气压力下燃煤电厂烟气驱替煤层瓦斯研究

Study on coal bed gas displacement by flue gas in coal-fired power plants under different gas injection factors

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 13

参考文献 19

相关文章 15

编辑推荐

Metrics

本文评价

[1]	谢宏, 于悦, 谢剑飞. 安全生产视域下安全评价模型的演绎与解析[J]. 中国安全科学学报, 2025, 35(S1): 9-13.
[2]	白刚, 张海晶, 苏俊, 梁晗, 张潇文, 刘正东. 电厂烟气注气压力对煤层吸附态瓦斯解吸效率的影响[J]. 中国安全科学学报, 2025, 35(5): 91-98.
[3]	双海清, 刘子嘉, 林海飞, 周斌, 张文琦, 罗永刚. 缓倾斜煤层高位定向长钻孔抽采卸压瓦斯技术研究[J]. 中国安全科学学报, 2024, 34(S1): 102-108.
[4]	杜栋栋, 雷文杰, 李东会, 李哲. 矿井瓦斯抽采钻孔偏移特性研究[J]. 中国安全科学学报, 2024, 34(3): 155-161.
[5]	闫路, 王涛, 王连聪, 李文璞, 赵天维. 非对称荷载下煤层瓦斯渗流特性与抽采半径优化[J]. 中国安全科学学报, 2024, 34(12): 149-158.
[6]	李贺, 蒋训祁, 鲁义, 施式亮, 路洁心, 曹洁艳. 循环微波辐射下含水煤体的孔隙结构演化机制[J]. 中国安全科学学报, 2024, 34(11): 99-107.
[7]	李生亚, 高坤, 张斌峰, 王永健, 贾男, 高宏烨. 瓦斯抽采泵站智能化应用研究[J]. 中国安全科学学报, 2023, 33(S2): 85-90.
[8]	徐阿猛, 胡洋, 尹立, 贾进章, 杨涛. 极薄煤层高效钻采关键技术[J]. 中国安全科学学报, 2023, 33(7): 98-104.
[9]	李宏, 马金魁, 田坤云, 杨皓. 瓦斯抽采钻孔封孔作业风险辨识与评估[J]. 中国安全科学学报, 2023, 33(12): 85-91.
[10]	赵鹏翔, 常泽晨, 李树刚, 卓日升, 林海飞, 金士魁. 厚煤层采空区定向孔分域抽采研究及应用[J]. 中国安全科学学报, 2023, 33(1): 70-79.
[11]	吴学海, 李波波, 高政, 许江, 付佳乐. 气体压力降低对煤岩变形和渗流的影响机制[J]. 中国安全科学学报, 2022, 32(4): 129-134.
[12]	韩雷 , 沈春明, 王维华. 水力切槽钻孔瓦斯涌出特征及渗透率反演分析^*[J]. 中国安全科学学报, 2021, 31(7): 105-112.
[13]	王俏, 王兆丰, 马树俊, 张康佳. 冷冻取芯过程煤样温度变化特性研究[J]. 中国安全科学学报, 2021, 31(2): 76-81.
[14]	贾进章, 葛佳琪, 甄纹浩, 赵丹. 水力压裂增透技术及应用研究[J]. 中国安全科学学报, 2020, 30(10): 63-68.
[15]	赵尤信, 齐庆杰, 吕有厂, 贾新雷, 张晋京. “两堵一注一排全筛网管”工艺及机制研究[J]. 中国安全科学学报, 2019, 29(8): 118-123.

组	注气压力/MPa	注气温度/K
1	0.5	300
2	1.0	300
3	1.5	300
4	2.0	300
5	2.5	300

压力/MPa	N₂用时/d	CO₂用时/d	O₂用时/d
0.5	4	48	26
1	3	29	21
1.5	2	16	12
2	2	14	11
2.5	2	12	10