超高压反应器自增强处理的理论与模拟研究

Theoretical and FEA Study on Autofrettage of Ultrahigh Pressure Tubular Reactor

超高压反应器长期在高温、高压的严酷条件下服役,受到压力波动、腐蚀因素的影响,一旦发生泄漏、爆炸事故,将造成严重的人员伤亡和重大的财产损失。本文通过理论计算与有限元模拟分析,针对某石化厂的现役超高压聚乙烯管式反应器,研究其自增强处理前、后,工况条件下反应器沿壁厚方向当量应力的变化规律,并利用安全系数,量化评估自增强处理对反应器安全性的影响。

The ultra-high-pressure polyethylene reactor is operated under the complex and harsh working conditions. It is affected by high temperature, high pressure, pressure fluctuation and corrosion. If the ultra- high- pressure polyethylene reactor explodes or leaks, it will cause serious casualties and significant economic losses. The nonlinear finite element analysis （FEA） was used to analyze the autofrettage process of 18 year under service UHP polyethylene reactors in a petrochemical plant. And the equivalent stress change was obtained. The autofrettage effect was evaluated by using the yield stress and safety factor.