摘要
利用计算流体动力学(CFD)软件,采用标准k-ε模型、组分传输模型、多孔介质模型以及P1辐射模型对内热式低温干馏方炉内温度场进行了数值模拟.研究表明,改变燃气比时,燃气入口处温度分布趋势不变,低温干馏炉内达到的最高温度受燃气比影响较大,当燃气比为0.6时,最高温度可达到1 870℃.根据低温干馏原理,并结合炉内煤层温度分布的模拟结果,确定了最优的燃气比为1.8.
The temperature distribution of internal heating type low-temperature distil- lation furnace was simulated by computational fluid dynamics （CFD） software in this paper. Standard k-ε model, species transport model, porous medium model and P1 radiation model were selected. It is found that the temperature distribution trends near the entrance remain stable when changing the ratio of re-blow coal gas and air. The highest temperature in the furnace was considerably influenced by the ratio and reached the maximum point 1 870 ℃ at the ratio of 0.6. The optimal ratio of re-blow coal gas and air 1.8 was determined according to the principle of low temperature dry distillation and the simulation results of the temperature distribution of the coal seam in the furnace chamber.
出处
《煤炭转化》
CAS
CSCD
北大核心
2012年第2期56-60,共5页
Coal Conversion
基金
国家科技支撑计划项目(2009BAA20B02)
关键词
低温干馏
燃气比
温度场
数值模拟
low-temperature distillation, the ratio of re-blow coal gas and air, temperature field, numerical simulation
