不同风量下褐煤燃烧碳氧化物生成规律  

Generating rule of carbon oxides at lignite combustion stage in different air volume

作　　者：周西华[1,2,3] 白刚[1,2,3] 孙宝铁 聂荣山[1,2] 宋东平[1,2,3] 李昂[1,2] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000 [3]湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [4]吉林省安全科学技术研究院,吉林长春130051

出　　处：《辽宁工程技术大学学报（自然科学版）》2017年第10期1020-1025,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金(51274115;51274113);辽宁省教育厅基金(L2012122);煤矿安全开采技术湖南省重点实验室开放基金(201501)

摘　　要：为研究火区封闭过程中气体组分变化,通过分析火区内气体成分判定火区燃烧状态,以安全封闭火区防止因火灾引发瓦斯爆炸事故.利用程序升温实验研究了风量分别为40 m L/min、80 m L/min、120 m L/min、160 m L/min和200 m L/min时褐煤燃烧产生的碳氧化物体积分数及O_2体积分数变化规律.研究结果表明:风量越大,O_2体积分数变化趋势越小,消耗氧气量越小;相同温度条件下,O_2体积分数有随着风量增加呈现增加的规律性;随着风量增加,CO、CO_2生成量均减少,且CO、CO_2生成量与温度之间呈指数关系变化;相同温度下,随着风量增加,CO、CO_2生成量减少,且燃烧阶段CO生成量与风量呈指数关系变化,CO_2生成量与风量呈线性关系变化.随着风量增加,CO生成初始温度滞后,相同温度时CO生成量减少.In order to study gas composition changes in the process of fire zone close down, gas composition in the fire zone was analyzed to judge combustion state of fire zone, and fire zone was sealed safely to prevent gas explosion initiated by fire. This paper used programmed heating experiment to study change law of volume fraction of carbon oxides and oxygen emitted from lignite combustion when air volume are 40 m L/min, 80 m L/min, 120 m L/min, 160 m L/min and 200 m L/min respectively. The results shows that the greater the air volume, the smaller the change trend of oxygen volume fraction, and the smaller the amount of oxygen consumption. At a certain temperature, oxygen consumption is increasing with the air volume increase.With the increase of air volume, formation amount of CO and CO2 are reduced, and the change between formation amount of CO and CO2 and temperature shows exponential relationship. At the same temperature, CO, CO2 generation decreases with the increase of air volume. At combustion stage, CO gas production show exponential relationships with air volume, and CO2 gas production show linear relationships with air volume. With the increase of air volume, the initial temperature of CO generation is hysteretic,and CO formation amount is less at the same temperature.

关 键 词：褐煤燃烧 风量 滞后效应 碳氧化物 初现温度 

分 类 号：TD75[矿业工程—矿井通风与安全] X936[环境科学与工程—安全科学]