煤矿乏风蓄热氧化过程数值模拟  

Simulation on regenerative thermal oxidation of coal mine ventilation air methane

作　　者：陈相煜 王波[1] 周秋平 王雅亮 成金东 沈佳飞 孙聪聪 CHEN Xiang-yu;WANG Bo;ZHOU Qiu-ping;WANG Ya-liang;CHENG Jin-dong;SHEN Jia-fei;SUN Cong-cong(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Zhejiang Dun′an Machinery and Electronics Technology Co.,Ltd.,Shaoxing 311800,Zhejiang Province,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]浙江盾安机电科技有限公司,浙江绍兴311800

出　　处：《化学工程》2023年第1期78-83,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(52006144,51108264)。

摘　　要：建立蓄热氧化炉的三维单通道简化模型,利用FLUENT软件对煤矿乏风蓄热氧化过程进行数值模拟,分析甲烷体积分数、燃烧室温度、蓄热体温度、排烟温度及蓄热室温度效率等参数的动态变化规律。结果表明,在甲烷体积分数0.8%,进口温度27℃,进口流速1 m/s,两侧蓄热室高1.5 m,燃烧室长1.8 m,换向周期60 s的条件下,随着运行时间的增加,蓄热体温度、排烟温度及蓄热室温度效率都呈现出先缓慢后剧烈最后趋于稳定的变化规律;甲烷开始反应的位置不断地向蓄热体内移动。蓄热氧化炉稳定运行时,燃烧室的温度约1063℃,排烟温度约375℃,蓄热室温度效率约65.1%。在蓄热氧化炉设计时应充分考虑甲烷在蓄热体内反应放热对蓄热室传热性能和设备安全的影响,并采取高温烟气旁通等可靠的调温措施。A three-dimensional single-channel simplified model of the regenerative thermal oxidizer was established.The FLUENT software was used to numerically simulate the regenerative thermal oxidation of coal mine ventilation air methane,and analyze the evolution of methane volume fraction,combustion chamber temperature,regenerator temperature,outlet gas temperature and temperature efficiency.The results show that when the volume fraction of methane is 0.8%,the inlet temperature is 27℃,the inlet flow rate is 1 m/s,the height of the regenerators on both sides is 1.5 m,the length of the combustion chamber is 1.8 m,and the reversing period is 60 s,with the increase of operating time,the temperature of the regenerator,the exhaust gas temperature and the temperature efficiency of the regenerator all show the law of slow change,then violent change and finally keep stable.The position where methane begins to react continuously moves into the regenerator.During stable operation of regenerative thermal oxidizer,the temperature of the combustion chamber is about 1063℃,the outlet gas temperature is about 375℃,and the temperature efficiency of the regenerative chamber is about 65.1%.In the design of the regenerative thermal oxidizer,the influence of the reaction heat release of methane in the regenerator on the heat transfer performance and equipment safety of the regenerator should be fully considered,and take reliable temperature adjustment measures such as high-temperature flue gas bypass.

关 键 词：煤矿 乏风 蓄热氧化 数值模拟 

分 类 号：TK09[动力工程及工程热物理]