水冷壁气化炉变工况温度及热应力分析  

Temperature and thermal stress analysis in membrane wall gasifier under varied work conditions

作　　者：林伟宁[1] 梁钦锋[1] 刘海峰 于广锁[1] 龚欣[1] 

机构地区：[1]华东理工大学煤气化教育部重点实验室,上海200237

出　　处：《化工学报》2009年第10期2568-2575,共8页CIESC Journal

基　　金：国家自然科学基金项目(20876048);国家重点基础研究发展计划项目(2004CB217703);新世纪优秀人才支持计划项目(NCET-06-0416)~~

摘　　要：在实验室小型水冷壁气化炉上进行变工况气化试验,建立气化炉水冷壁的二维传热和应力模型,对气化炉变工况时水冷壁及渣层中的温度及应力变化进行了模拟计算。模拟结果表明:水冷壁及渣层中的周向应力及径向应力均随温度的升高而增大,而周向应力在数值上相对较大。在渣层-碳化硅层接触面上,随指定点与水冷管及渣钉的距离逐渐增大,等效应力迅速增大后趋于稳定;不同材料中的等效应力差异显著。Gasification experiment was performed in a bench-scale membrane wall entrained-flow gasifier and the work conditions were altered during the process. A two-dimensional model for the membrane wall was established to simulate the temperature and thermal stress changes. Results indicated that both the circumferential and the radial stress increases with the temperature rising in the membrane wall and slag layer, and the circumferential stress is relatively greater than the radial one. On the interface of slag and silicon carbide layer, the equivalent stress increases rapidly and then reaches to a steady state with the distance from the selected node to the water tube and the slag nail. Significant difference in the equivalent stress was observed for different materials.

关 键 词：气流床气化炉 水冷壁 渣层 热应力 

分 类 号：TQ054[化学工程]