气化炉与辐射废锅接口托架传热的数值分析  

Numerical analysis of heat transfer in gasifier radiation and waste heat boiler interface bracket

作　　者：占旺兵[1] 梁钦锋[1] 董志[1] 于广锁[1] 于遵宏[1] 

机构地区：[1]华东理工大学资源与环境工程学院煤气化教育部重点实验室,上海200237

出　　处：《计算机与应用化学》2009年第1期29-33,共5页Computers and Applied Chemistry

基　　金：国家重点基础研究计划资助项目(2004CB217703);教育部新世纪优秀人才支持计划(NCET-06-0416);上海市教委曙光计划(06SG34).

摘　　要：以通用的三维导热模型为基础,应用有限元法,计算了不同结构参数和操作条件下气化炉与辐射废锅接口内金属托架的传热特性。结果表明,托架长度、耐火纤维厚度、炉内温度是影响托架温度和热流密度分布的主要因素。托架最高温度和最大热流密度随着托架长度的增加而增大,随着炉内温度的提高而增大。托架外围包裹20 mm厚的耐火纤维,能有效降低托架的最高温度和最大热流密度。对于稳态操作的气化炉,其炉内温度变化范围约1200℃～1400℃,相应的金属托架最高温度变化范围约为420℃～480℃,最大热流密度约为(42.8～50.0)kW·m^(-2)。Based on the general heat transfer models, heat transfer properties of metal gasifier radiation and waste heat boiler interface bracket were calculated by using finite element method under different structure factors and operation conditions. It was found that temperature and heat flux distribution of interface were affected remarkably by the interface length, the thickness of fireproof fibers and the temperature of gasifier. The longer interface length and the higher gasifier temperature, the larger of temperature and the maximum heat flux of interface. The maximum temperature and the maximum heat flux of interface decreased remarkably with the interface wrapping 20 mm fireproof fibers. The temperature of gasifier may change from 1 200℃ to 1 400℃ under operation conditions, correlatively, the maximum temperature of interface is 420℃ -480℃ and the maximum heat flux of interface is （42. 8 - 50. 0）kW · m^-2

关 键 词：金属托架 温度分布 热流密度分布 有限元法 

分 类 号：TQ545[化学工程—煤化学工程] TP319[自动化与计算机技术—计算机软件与理论]