At present,the study of gas explosion mainly analyzes the mixture of methane and air.However,when gas explosion occurs in coal mine,not only methane gas is involved in the explosion,but the explosion gas often contains carbon monoxide gas and other gases,which affects the gas explosion reaction.In order to analyze how carbon monoxide gas affects gas explosion,20 L spherical explosion tank is used to determine the explosion pressure of methane and carbon monoxide mixed gas.The experimental results are as follows:the maximum explosion pressure of mixed gas increases first and then decreases when the concentration of carbon monoxide gas increases continuously.When the concentration of carbon monoxide reaches 2%,the maximum explosion pressure reaches the peak and the maxi-mum explosion pressure is 625.1 kPa.In the explosive mixture of 9.5%methane,carbon monoxide continuously reacts with oxygen as a fuel,and a chain reaction between methane and oxygen is added.When the amount of carbon monoxide gas injected is small,carbon monoxide gas is basically used as fuel,promoting the concentration of the reaction substance to reach the stoichiometric value,which is conducive to increasing the maximum explosion pressure.With the continuous increase of carbon monoxide concentration,oxygen deple-tion occurs in the whole reaction,and the high concentration of carbon monoxide gas inhibits the chain reaction of methane,reducing the maximum explosion pressure.
关键词
瓦斯爆炸/爆炸压力/基元反应/温度敏感性/自由基
Key words
gas explosion/explosion pressure/elementary reaction/temperature sensitivity/free radical
维普
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