乙烯裂解炉砖墙衬里传热有限元模拟

HEAT TRANSFER SIMULATION OF FIRE-BRICK LINING IN ETHYLENE CRACKING FURNACE

为分析不同衬里截面组合及锚固件对裂解炉外壁温度的影响,文章结合乙烯裂解炉砖墙衬里结构特点,分别建立了仅热面砖、热面加背层砖、组合砖、含拉砖钩、含托砖板和拉砖钩等计算模型。通过有限元的方法对模型传热过程进行求解,并将求解结果与标准计算结果进行了比较。根据计算结果中炉外壁温度的分布,总结出不同模型之间计算结果的偏差,并对局部热点影响范围进行了分析,同时,还对衬里传热工程设计计算提出了建议。

In order to analyze the influence of different combinations of liningcross sections and anchors on the temperature distribution of the outer casting of the cracking furnace,this paper combined the structural characteristics of fire brick lining and established respectively the calculation models for hot-faced bricks,hot-faced and back-layered bricks,composite bricks,bricks with tie-back,bricks with tie-back and support plate.The finite element method is applied to analyze the heat transfer process of the models and the results are compared with the standard calculation results.Based on the temperature distribution of the outer casting of the furnace in the calculation results,the deviation of the calculation results between different models is summarized and the influence range of partial hot spot is analyzed.Meanwhile,suggestions for the lining heat transfer calculation during engineering are provided.