摘要
为了给矿井乏风逆流氧化装置设计提供理论依据,数值模拟研究了逆流氧化床温度分布和工作特性.结果显示:逆流氧化床内固体蜂窝陶瓷的蓄热和释热效应,使得含甲烷气体成分极低的模拟矿井乏风在其内能够自维持逆流高温氧化.数值模拟中逆流氧化床轴向中心线上M形温度分布特点与实验结果一致.逆流氧化床轴向中心线上温度分布、出口温度值、化学反应速率分布、气固两相间单位容积换热量分布主要受往复半周期、混合气体中甲烷气体质量分数和混合气体质量流量等参数影响.
To provide a theoretical basis for the design of the flow-reversal thermal oxidation equipment,the temperature distribution and work characteristics for a flow-reversal thermal oxidation bed are numerically studied.The experimental results show that the most heat of the methane thermal oxidation can be stored by the honeycomb ceramic filled in the oxidation bed of the thermal flowreversal oxidation equipment,and then used to preheat the fresh mixture gas.The dilute methane in mixture gas can keep an independent self-sustain thermal oxidation course in the flow-reversal thermal oxidation bed.The M-shaped configuration of the temperature profile along the axial direction in the numerical simulation is in good agreement with the experiment.Meanwhile,profiles of the temperature distribution,exhaust temperature,oxidation reaction rate distribution,heat transfer from gas to solid medium along the axial direction in the oxidation bed are mainly subjected to effects of the half cycle,mass fraction of methane in mixture gas,mass flow rate.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2012年第6期816-822,共7页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(51076020)
关键词
逆流氧化
蜂窝陶瓷
温度分布
矿井乏风
flow-reversal thermal oxidation
honeycomb ceramic
temperature distribution
coal mine ventilation air methane
