燃气比对低温干馏方炉温度场的影响研究  

IMPACT OF THE RATIO OF RE-BLOW COAL GAS AND AIR ON TEMPERATURE FIELD IN LOW TEMPERATURE DRY DISTILLATION FURNACE

作　　者：张秋利[1] 胡小燕[1] 赵西成[1] 兰新哲[1] 宋永辉[1] 

机构地区：[1]西安建筑科技大学,陕西省冶金工程技术研究中心,西安副教授博士710055

出　　处：《煤炭转化》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)

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.

关 键 词：低温干馏 燃气比 温度场 数值模拟 

分 类 号：TQ523[化学工程—煤化学工程]