大直径卧式容器分液隔板的应力与变形分析

STRESS AND DEFORMATION ANALYSIS OF LIQUID-VAPOR SEPARATION BAFFLE IN LARGE DIAMETER HORIZONTAL VESSEL

分液隔板的作用是将容器内部空间分成两部分用来盛放不同的介质。隔板仅一侧装满物料的情况下,其应力与变形较大,容易破坏,从而造成安全隐患。文章在对比卧式容器分液隔板应力计算解析法的基础上,深入分析了隔板的承载模型和失效形式,借助有限元分析软件考察了大直径卧式容器隔板以及带加强肋隔板的应力与变形规律,同时还考察了隔板厚度,扁钢加强肋规格、位置、数量以及布置形式对隔板的最大应力与挠度值的影响,得到如下结论:在一定程度上增加隔板厚度对隔板应力的改善是明显的,但当隔板厚度达到一定值时,继续增加隔板厚度并不能明显改善隔板的受力情况;在布置隔板加强肋时,应尽量使被加强肋分割的区间面积近似相等,这样可使隔板受力达到一个较好的状态;推荐扁钢加强肋的高厚比为8~10;在隔板的竖向中轴线设置纵向加强肋,可以明显改善隔板受力状态;加强肋的数量应设置合理,数量过多会增加焊接工作量,影响其本身经济性。

The function of the liquid-vapor separation baffle is to divide the inner space of the container into two parts for holding different media.When only one side of the baffle is filled with materials,the stress and deformation of the baffle are large,and the baffle is easy to be damaged,thus causing safety risks.Based on the comparison of the analytical method for calculating the stress of the liquid-vapor separation baffle of the horizontal vessel,this paper deeply analyzed the bearing model and failure mode of the baffle,and investigated the stress and deformation laws of the liquid-vapor separation baffle of the large diameter horizontal vessel and the baffle with reinforced ribs with the help of the finite element analysis software.Meanwhile,the paper also investigated the influences of the thickness of the baffle,the size,position,number and the arrangement of the reinforced ribs on the maximum stress and deflection of the baffle.The following conclusions were obtained:increasing the thickness of the baffle to some extent can obviously improve the stress of the baffle,but when the thickness of the baffle reaches a certain value,increasing the thickness of the baffle cannot obviously improve the stress of the baffle;when arranging the reinforced ribs of the baffle,the area of the partitioned interval by the reinforced ribs should be as close to equal as possible,so that the force of the baffle can reach a better state;the recommended height to thickness ratio of the flat steel is 8~10;setting longitudinal reinforced ribs on the vertical axis of the baffle can improve the force of the baffle obviously;the number of reinforced ribs should be set reasonably and too many reinforced ribs will increase the welding workload and influence its economy.