摘要
为了研究风量对煤低温氧化自燃过程的影响,采用程序升温的方法将煤温控制在恒温条件下,通过逐渐减小风量的手段,比较了CO绝对产生量随煤温和风量的变化规律,确定了不同煤温时的当量风量,并根据CO增长率变化确定了煤自燃的临界温度。通过理论分析和试验研究,基于CO绝对产生量和风量,推导了煤活化能的表达式,得出了煤温、CO绝对产生量、风量和活化能四者之间的关系式。研究结果表明,CO绝对产生量随风量的增大而增大,超过当量风量后,CO绝对产生量基本保持不变;煤温越高,煤自燃所需的当量风量越大。该研究对深入探索煤自燃机理和指导现场煤自燃防治具有重要的意义。
In order to study the airflow affected to the low temperature oxidized spontaneous combustion process of coal, a programmed temperature rising method was applied to the coal temperature control under the condition of the constant temperature.With the means to steadily reduce the airflow, the variation law of absolute yield of CO with coal temperature and airflow was compared, and the equivalent airflow at different coal temperature was determined.According to the variation of CO increased rate,the critical temperature of the coal spontane- ous combustion was determined.With the theoretical analysis and experiment study,based on the absolute yield of CO,in combination with the mine airflow, the expression formula of the coal activated energy was derived and the relational expression between the coal temperature, absolute yield of CO ,airflow and activated energy was obtained.The study results showed that the absolute yield of CO would be increased with the mine airflow increased.When the equivalent airflow was exceeded, the absolute yield of CO would be kept in constant basically.The higher the coal temperature was, the greater the equivalent airflow required by coal spontaneous combustion.The study would have important significances to deep probe the coal spontaneous combustion mechanism and to the site guidance of the coal spontaneous combustion prevention and control.
作者
邓军
邓寅
张玉涛
王彩萍
Deng Jun Deng Yin Zhang Yutao Wang Caiping(MOE Key Lab of Mining and Disaster Prevention in Western Mine,Xi＇ an 710054, China School of Safety Science and Engineering,Xi＇ an University of Science and Technology,Xi＇ an 710054,China)
出处
《煤炭科学技术》
CAS
北大核心
2016年第12期70-74,共5页
Coal Science and Technology
基金
国家自然科学基金青年基金资助项目(51404192
51504187)
中国博士后科学基金特别资助项目(2015T81043)
陕西省自然科学基础研究资助项目(2015JQ5174)
陕西省教育厅专项计划资助项目(15JK1479)
关键词
CO绝对产生量
风量
低温氧化
自燃
活化能
absolute yield of CO
air flow
low temperature oxidization
spontaneous combustion
activated energy
