高温容器裙座热应力的工程计算方法  

AN ENGINEERING CALCULATION METHOD ON THERMAL STRESS IN SKIRT OF HIGH-TEMPERATURE VESSEL

作　　者：袁振邦 钱佳宁 张晓秋 Yuan Zhenbang;Qian Jianing;Zhang Xiaoqiu(SINOPEC Ningbo Engineering Co.,Ltd.,Ningbo 315103;PetroChina Jilin Oil Field Co.,Ltd.,Jilin 13800)

机构地区：[1]中石化宁波工程有限公司,浙江宁波315103 [2]中国石油吉林油田公司,吉林138008

出　　处：《大氮肥》2018年第2期98-102,105,共6页Large Scale Nitrogenous Fertilizer Industry

摘　　要：对于工作温度高、设备直径大的立式容器,裙座顶部的温差应力可能很高,甚至可能成为控制应力。通过分析裙座轴向温度场分布和轴向温差应力,得到裙座顶部热应力的板壳理论解;结合工程实际,得到裙座顶部热应力的简单工程计算方法。计算结果表明,仅以介质操作温度作为是否设置隔气圈的判据是不合理的。经与有限元计算结果对比,证明该工程计算方法可靠。Thermal stress in skirt support due to axial temperature gradient is a concern in vertical pressure vessel design. It could be dramatically high when the vessel has a large diameter and served in high temperature. In some cases, thermal stress can even become the main cause of support failure. However, calculation method on thermal stress has not included in current standards. Based on mechanical analysis, and combined with study on axial temperature gradient, theoretical solution of thermal stress in skirt has been obtained. Finally, the solution has been simplified according to engineering practice. The result has indicated that taking working temperature alone as the criteria of setting air isolation ring is not reasonable. FEM analysis has proved the reliability of this method.

关 键 词：高温 裙座 温度场 热应力 隔气圈 

分 类 号：TQ050.2[化学工程]