不同气氛下对流废锅流场和温度场的数值模拟  

NUMERICAL SIMULATION FOR FLOW FIELD OF CONVECTIVE WASTE HEAT BOILER AND TEMPERATURE FIELD UNDER DIFFERENT AMBIENCE

作　　者：孟磊[1] 金晶[1] 董振[1] 高文静[1] 曾武勇[1] 高新勇[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海硕士生200093

出　　处：《煤炭转化》2014年第1期45-50,共6页Coal Conversion

基　　金：上海市教委科研创新重点项目(12ZZ141)

摘　　要：分别在两种气氛下(CO-H_2和CO_2-N_2)就对流废热锅炉三段受热面和三圈环隙内合成气的流动和温度分布进行数值模拟研究.结果表明,两种气氛下,速度场相近;离散相在炉内的停留时间基本相同;两种气氛下,传热系数随三环隙和三段受热面的变化规律一致,CO_2和N_2气氛下的传热系数较还原性气氛大;两种气氛下,换热量分配不同,导致温度场差别较大.在不同气氛下所引起的温度分布不同必将导致炉内受热面布置方式的不同.研究为对流废热锅炉在不同气氛下的安全性和高效性设计提供了依据.The flow of syngas and the temperature distributions of three sections of heating surface and three circular gaps for convective waste heat boiler under the two kinds of ambience （CO and H2,CC2 and N2） are studied respectively by numerical simulation methods.The results show that under two kinds of ambience,the velocity fields are similar; the residence time of discrete phase in the boilers are identical; under two kinds of ambience,the changing laws of heat transfer coefficient varying with the circular gap and three sections of heating surface are the same.The heat transfer coefficient under CO2 and N2 ambience is bigger than that under reducing ambience; under two kinds of ambience,heat transfer distribution is different,which leads to big difference in temperature field.The different temperature distribution caused by different ambience will contribute to different arrangement of the heating surface in the boiler.Therefore,the article provides the reference to the design of safety and high efficiency of convective waste heat boiler under two different ambience.

关 键 词：温度场 流场 颗粒相 对流废热锅炉 

分 类 号：TK229.8[动力工程及工程热物理—动力机械及工程] TQ018[化学工程]