|本期目录/Table of Contents|

[1]杨宏民,霍晓阳,蒋滢滢.等压扩散和高压注入条件下CO2对煤中CH4置换效应[J].中国安全生产科学技术,2017,13(8):24-29.[doi:10.11731/j.issn.1673-193x.2017.08.004]
 YANG Hongmin,HUO Xiaoyang,JIANG Yingying.Replacement effect of carbon dioxide to methane in coal under isobaric diffusion and high pressure injection conditions[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(8):24-29.[doi:10.11731/j.issn.1673-193x.2017.08.004]
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等压扩散和高压注入条件下CO2对煤中CH4置换效应
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年8期
页码:
24-29
栏目:
学术论著
出版日期:
2017-08-31

文章信息/Info

Title:
Replacement effect of carbon dioxide to methane in coal under isobaric diffusion and high pressure injection conditions
文章编号:
1673-193X(2017)-08-0024-06
作者:
杨宏民12霍晓阳3蒋滢滢1
(1.河南理工大学 安全科学与工程学院,河南 焦作 454003; 2.煤矿灾害预防与抢险救灾教育部工程研究中心,河南 焦作 454000; 3. 河南理工大学 材料科学与工程学院,河南 焦作 454003)
Author(s):
YANG Hongmin12 HUO Xiaoyang3 JIANG Yingying1
(1. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China; 2. MOE Engineering Center of Mine Disaster Prevention and Rescue, Jiaozuo Henan 454000, China; 3. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China)
关键词:
等压扩散高压注入置换效率置换机理
Keywords:
isobaric diffusion high pressure injection replacement efficiency replacement mechanism
分类号:
TG712
DOI:
10.11731/j.issn.1673-193x.2017.08.004
文献标志码:
A
摘要:
为了揭示注气压力对置换煤层瓦斯效应的影响,开展了等压扩散和高压注气2种条件下CO2对煤中CH4置换试验研究。试验结果表明:在置换源气体充入量相等的条件下等压扩散试验中CO2对煤中CH4的置换量大于高压注气试验的置换量,且等压扩散条件下CO2置换CH4效率维持在0.44 cm3/cm3左右,而高压注气条件下CO2置换CH4效率却随注入量的增加而持续增加,但其增加率逐渐衰减。等压扩散条件下吸附平衡后系统总压略有下降,降幅一般为8%左右;高压注气条件下吸附平衡后系统总压呈持续上升规律,最大增幅为60%。研究成果对该项技术工程应用的启示是:井下煤层注气置换/驱替煤层瓦斯时,不一定要追求高的注气压力,采用低压注气也可收到良好的促排瓦斯效果,又能大幅度提高注气的安全可靠性。
Abstract:
In order to reveal the influence of gas injection pressure on replacement effect of coal seam methane, the experimental study on replacement of methane in coal by carbon dioxide under two types of conditions including isobaric diffusion and high pressure gas injection was carried out. The results showed that under the same injection amount of replacement source gas, the replacement amount of carbon dioxide to methane in coal under isobaric diffusion condition was higher than that under high pressure gas injection condition. The replacement efficiency under isobaric diffusion condition remained stable at about 0.44 cm3/cm3, while the replacement efficiency under high pressure gas injection condition continuously increased with the increase of injection amount, but the increasing rate decreased gradually. The system total pressure after adsorption equilibrium under isobaric diffusion condition decreased slightly, with the decreasing amplitude of about 8%, while the system total pressure after adsorption equilibrium under high pressure gas injection condition increased continuously, with the maximum increasing amplitude of 60%. The enlightenment of the results on the engineering application of this technology is that the replacement/displacement of coal seam methane by gas injection for underground coal seam does not have to pursue the high gas injection pressure, the application of low pressure gas injection can also receive a good gas drainage effect and can significantly improve the safety and reliability of gas injection.

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相似文献/References:

[1]杨宏民,刘媛,吕宝艳.高压注入和等压扩散条件下N2置换煤中CH4的研究*[J].中国安全生产科学技术,2022,18(2):94.[doi:10.11731/j.issn.1673-193x.2022.02.014]
 YANG Hongmin,LIU Yuan,LYU Baoyan.Study on replacement methane with nitrogen from coal by high pressure injection and equal pressure diffusion[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2022,18(8):94.[doi:10.11731/j.issn.1673-193x.2022.02.014]

备注/Memo

备注/Memo:
国家自然科学基金项目(51174081) ; 河南省高校科技创新团队支持计划(17IRTSTHN030); 教育部创新团队发展支持计划(IRT-16R22)
更新日期/Last Update: 2017-09-11