煮沸换热器改造设计及变径锥壳选择

Reforming Design and Reducing Cone Shell Selection for Boiling Heat Exchanger

在化工设备换热器设计中,壳体上的变径锥体结构选择,关系到设备安全,经济合理性。一般情况,当锥壳半顶角α≤30°、且设计压力p≤2MPa时选用无折边锥形封头降低锥角度,可减小壳体厚度;如何选择锥壳封头的焊缝系数对壳体厚度影响较大。当锥壳封头A类焊缝采用RT100%、Ⅱ级合格,焊缝系数取Φ=1则是最为经济的明智选择,从而节省锥封头折边成型加工费用,降低制造成本。

During heat exchanger design,selection of reducing cone structure on the shell is related to the equipment safety and economy.This article describes the selection of reducing cone.