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[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):94-99.[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(2):94-99.[doi:10.11731/j.issn.1673-193x.2022.02.014]
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高压注入和等压扩散条件下N2置换煤中CH4的研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
18
期数:
2022年2期
页码:
94-99
栏目:
职业安全卫生管理与技术
出版日期:
2022-02-28

文章信息/Info

Title:
Study on replacement methane with nitrogen from coal by high pressure injection and equal pressure diffusion
文章编号:
1673-193X(2022)-02-0094-06
作者:
杨宏民; 刘媛; 吕宝艳
(1.河南理工大学 安全科学与工程学院，河南 焦作 454000;
2.煤炭安全生产与清洁高效利用省部共建协同创新中心，河南 焦作 454000;
3.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;
4.洛南县应急管理局,陕西 洛南 726100)
Author(s):
YANG Hongmin;  LIU Yuan;  LYU Baoyan
(1.School of Science and Engineering,Henan Polytechnic University,Jiaozuo Henan 454000,China;
2.State Collaborative Innovation Center of Coal Work Safety and Clean efficiency Utilization,Jiaozuo Henan 454000,China;
3.MOE Engineering Research Center of Coal Mine Disaster Prevention and Emergency Rescue,Jiaozuo Henan 454000,China;
4.Luonan County Emergency Management Bureau,Luonan Shaanxi 726100,China)
关键词:
高压注入; 等压扩散; 置换效率; 置换压力; 置换效果
Keywords:
high pressure injection;  equal pressure diffusion;  replacement efficiency;  replacement pressure;  replacement effect
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2022.02.014
文献标志码:
A
摘要:
为探究注气置换抽采煤层瓦斯的效果，揭示注弱吸附性气体N2在等压扩散和高压注入2种条件下置换煤中CH4的机理，采用自行搭建的含瓦斯煤多元气体置换试验装置，开展等压扩散和高压注入2种条件下注N2置换煤中CH4的试验研究。研究结果表明：在注N2量相同的条件下，等压扩散置换量始终高于高压注气置换量，在等压扩散下N2置换CH4效率在21.32％浮动，高压注气下置换效率随着注N2量的增加而减小；等压扩散下注N2能置换煤中CH4主要是因为CH4分压降低和气体竞争吸附；高压注入下注N2能置换煤中CH4主要是由于游离相中总压上升和气体的竞争吸附；注N2量相同时，等压扩散下CH4解吸率和N2注置比均高于高压注入，对注N2置换煤中CH4采用等压扩散方法，置换效果更好。
Abstract:
To explore the effect of coal seam gas drainage by gas injection replacement,and reveal the mechanism of replacement of CH4 in coal by the injection of weak adsorption gas N2 under the two conditions of equal pressure diffusion and high pressure injection,a self-built test device of multi-element gas replacement for coal containing gas was used to carry out the experimental research on the replacement of CH4 in coal by N2 injection under the two conditions of equal pressure diffusion and high pressure injection.The results showed that the replacement amount of equal pressure diffusion was always higher than that of high pressure gas injection under the same amount of N2 injection.The efficiency of N2 replacement CH4 fluctuated at 21.32% under equal pressure diffusion,and the replacement efficiency under high pressure injection decreased with the increase of N2 injection amount.The CH4 in coal could be replaced by N2 injection under equal pressure diffusion was mainly because of the decrease of partial pressure of CH4 and competitive adsorption of gas.The CH4 in coal could be replaced by high pressure N2 injection was mainly because of the total pressure rise in the free phase and the competitive adsorption of gas.Under the same amount of N2 injection,both the CH4 desorption rate and N2 injection-replacement ratio under equal pressure diffusion were higher than those under high pressure injection,and the replacement effect of CH4 in coal by N2 injection with the equal pressure diffusion method was better.

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相似文献/References:

[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.[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(2):24.[doi:10.11731/j.issn.1673-193x.2017.08.004]

备注/Memo

备注/Memo:
收稿日期： 2021-03-30
* 基金项目： 国家自然科学基金项目 (52074104)；河南省高校科技创新团队支持计划项目 (17IRTSTHN030);教育部创新团队发展支持计划项目 (IRT_16R22)
作者简介： 杨宏民，博士，教授级高工，主要研究方向为煤矿通风防灭火、瓦斯防治等。
通信作者： 刘媛，硕士研究生，主要研究方向为煤层瓦斯防治。
更新日期/Last Update: 2022-03-18