高炉炉顶粗煤气管道三维有限元分析

3-D Finite Element Analysis of the Blast Furnace Coal Pipeline

高炉大型化对炉顶粗煤气管道系统带来的显著改变之一是下降管长度的增加,为此有必要对高炉粗煤气管道系统进行数值分析,明确该系统的承载特性。以某大型高炉工程为背景,运用通用有限元软件ANSYS10.0建立包括上升管、球节点、下降管和重力除尘器框架在内的三维仿真数值模型,进行各种荷载作用及主要组合下的三维数值计算分析。求出各种荷载作用及主要组合下粗煤气管道的等效应力及空间变形,绘出相应的应力图和变形图。对数值计算结果进行分析,表明高炉粗煤气管道系统荷载效应的主要矛盾突出在两个方面:球节点与上升管和下降管相交部位的应力较大以及下降管挠度较大,而且,下降管的自重是它们的主要构成要素。以上两方面矛盾与我国部分已投产高炉炉顶粗煤气管道系统遇到的实际问题比较吻合。

One of the most important impacts on the blast furnace top coal pipeline system by the becoming larger trend of blast furnace is that the descending pipe become longer and longer.To apprehend the loading mechanics of the coal pipeline system,especially the spherical node stress and decline pipe displacement character of loading,three-dimensional numerical simulation analysis of the blast furnace coal pipeline system is very necessary.Based on a large-scale blast furnace engineering,three-dimensional numerical simulation model of the ascending pipe,spherical node,descending pipe and gravity dust catcher frame have been founded with the universal finite element program ANSYS10.0.And then the numerical computation analysis about it has been carried out.As a result,the coal pipeline system equivalent stress and space displacement under some kinds of loading and their combination are worked out.Through analysis the computation results,it is clear that the loading mechanics of the coal pipeline system focus on tow aspects： stress value on the intersection of spherical node with ascending pipe and descending pipe is very vastness,the displacement of descending pipe is large.These conclusions are very consistent with the fact problems encountered by some blast furnaces which have been put into production in our country.By the way,the tow aspects above are mainly owing to the weight of descending pipe.