| 初始扰动对CO2抑制瓦斯爆炸特性研究* |
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| 引用本文： | 杨炳辉,江丙友,苏明清,王培龙,洪汉,李静静,姚祺.初始扰动对CO2抑制瓦斯爆炸特性研究*[J].中国安全生产科学技术,2022,18(9):75-81. |
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| 作者姓名： | 杨炳辉 江丙友 苏明清 王培龙 洪汉 李静静 姚祺 |
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| 作者单位： | (1.安徽理工大学 工业粉尘防控与职业安全健康教育部重点实验室，安徽 淮南 232001；2.安徽理工大学 安全科学与工程学院，安徽 淮南 232001；3.中国矿业大学（北京） 应急管理与安全工程学院，北京 100083) |
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| 基金项目： | * 基金项目: 国家自然科学基金项目（51874009） |
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| 摘 要： | 为了预防实际生产过程中发生的瓦斯爆炸事故，利用20 L球形爆炸装置，通过改变粉尘仓充压压力产生不同的扰动，研究9.5%CH4浓度下不同扰动条件对CO2抑爆特性的影响。通过对所得参数进行分析，得到CO2抑爆特性与初始扰动的关系。研究结果表明:相较于均匀静置状态，初始扰动的存在均能提高CH4的爆炸强度，当引发初始扰动的粉尘仓压力为1.5 MPa时，最大爆炸压力达到0.78 MPa；随CO2浓度增大，爆炸强度整体下降，呈二次下降趋势、最大爆炸压力时间呈上升趋势，且各初始扰动压力间爆炸强度均大于均匀静置状态、最大爆炸压力时间小于均匀静置状态；同时利用CHEMKIN软件得到绝热平衡压力，计算热损失参数发现，同一气体混合比例工况下，初始扰动状态的热损失及热损失分数明显低于均匀静置状态的，且当CO2浓度为15%时，差距最大，不同初始扰动间热损失及热损失分数最小值分别为0.013 19 kJ/m2，17.9%，远小于静置状态下0.036 29 kJ/m2，46.4%，说明初始扰动对于CO2抑爆效果存在削弱作用。
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| 关 键 词： | 初始扰动 CO2 瓦斯爆炸 抑爆 |
Study on characteristics of suppressing gas explosion by CO2 under initial disturbance |
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| YANG Binghui,JIANG Bingyou,SU Mingqing,WANG Peilong,HONG Han,LI Jingjing,YAO Qi.Study on characteristics of suppressing gas explosion by CO2 under initial disturbance[J].Journal of Safety Science and Technology,2022,18(9):75-81. |
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| Authors: | YANG Binghui JIANG Bingyou SU Mingqing WANG Peilong HONG Han LI Jingjing YAO Qi |
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| Affiliation: | (1.Key Laboratory of Industrial Dust Control and Occupational Safety and Health of MOE,Anhui University of Science and Technology,Huainan Anhui 232001,China;2.College of Safety Science and Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;3.School of Emergency Management and Safety Engineering,China University of Mining and Technology (Beijing),Beijing 100083,China) |
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| Abstract: | In order to prevent the gas explosion accident in the actual production process,a 20 L spherical explosion device was used to produce different disturbance by changing the charging pressure of dust chamber,and the influence of different disturbance conditions on the explosion suppression characteristics of CO2 under 9.5% CH4 concentration was investigated.The relationship between the explosion suppression characteristics of CO2 and the initial disturbance was obtained by analyzing the parameters.The results showed that compared with the uniform stationary state,the explosion intensity of CH4 could be increased by the presence of the initial disturbance,and the maximum explosion pressure reached 0.78 MPa when the pressure of dust chamber causing the initial disturbance was 1.5 MPa.With the increase of CO2 concentration,the explosion intensity decreased as a whole with a secondary decrease trend,and the maximum explosion pressure time presented an increasing trend.The explosion intensity of each initial disturbance pressure was greater than that of the uniform stationary state,and the maximum explosion pressure time was less than that of the uniform stationary state.At the same time,the adiabatic equilibrium pressure was obtained by Chemkin software,and the heat loss parameters were calculated.It was found that the heat loss and the heat loss fraction in the initial disturbance state were obviously lower than those in the uniform stationary state under the same gas mixing ratio,and when the CO2 concentration was 15%,the difference was the biggest.The minimum value of the heat loss and the heat loss fraction was 0.013 19 kJ/m2 and 17.9%,which was much less than 0.036 29 kJ/m2 and 46.4% in the stationary state,indicating that the initial disturbance weakened the effect of CO2 suppression. |
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| Keywords: | initial disturbance CO2 gas explosion explosion suppression |
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