溶剂回收塔顶-塔底换热器管箱有限元分析

Finite Element Analysis of Heat Exchanger Tube Box on Top and Bottom of Solvent Recovery Tower

为了保证溶剂回收塔顶-塔底换热器管箱的安全性和可靠性,有必要在其投入使用前进行有限元分析。本文对某型号溶剂回收塔换热器的后端管箱进行应力分析和强度评定,依据换热器的二维设计图建立有限元模型。根据换热器后端管箱的受力情况确定模型的边界条件,通过ANSYS有限元仿真软件计算获得换热器后端管箱的整体结构Tresca应力云图,得出此结构的最大等效当量应力值位于平底封头平板中心处,最大当量应力为253.121 MPa。最后依据JB4732—1995(R2005)《钢制压力容器——分析设计标准》对此结构进行应力强度评定。评定结果验证了此结构设计的安全性和合理性。

To ensure the safety and reliability of heat exchanger tube box on top and bottom of solvent recovery tower,it is necessary to carry out finite element analysis before the heat exchanger tube box is put into use.The stress analysis and strength evaluation of the rear tube box of heat exchanger on a type of solvent recovery tower were performed,and the finite element model was established according to the two dimensional-design graph of the heat exchanger.The boundary conditions of the model were determined according to the force of the rear tube box of the heat exchanger.The Tresca stress cloud diagram of the whole structure of the rear tube box of the heat exchanger was calculated by ANSYS finite element simulation software.It was concluded that the maximum equivalent stress value of the structure is 253.121 MPa in magnitude and locats at the center of the flat head plate.Finally,according to JB4732-1995(R2005)"Steel Pressure Vessels--Design by Analysis",the stress strength of this structure was evaluated,and the safety and rationality of the structure design was verified.