[author] Gu Yang Jiang Pengfei Pan Yanjun Luan Jiaqi Mamat Weiyi Su Zi m Ralph
【关键词】 裂解炉 一次注汽管线 弹簧支吊
[Key words] a spring support for a steam injection pipeline of cracking furnace.
【摘要】乙烯装置加氢尾油裂解炉配套的材质为A335 P11的一次注汽管线,是混合器的冷 、热稀释蒸汽汇合点.在530℃ 操作温度下,有管线部分弹簧支吊架失效以及其连接焊缝反复产生裂纹的现象发生.经过模拟运行工况得知,此焊缝裂纹产生的原因是管线在运行过程中应力超标 、冷热注汽切换时温变较大导致.通过采取更改管线走向 、注汽点管台更换新型式 、更换及新增部分弹簧支吊架的改造方案后,2 a多的实际良好运行表明了优化改造的成功.
[Abstract] the primary steam injection line of the ethylene plant hydrogenation tail oil cracking furnace is a primary steam injection line of A335 P11, which is the cold and hot dilution steam confluence point of the mixer. At the operating temperature of 530 C, there is a failure of the spring support frame of the pipeline and the occurrence of the repeated cracks in the connection weld. The cause of the crack is that the stress of the pipeline exceeds the standard during the operation and the temperature changes greatly during the switching of cold and hot steam. After changing the pipeline direction, replacing the new type of steam injection point tube table, replacing and adding some new spring hangers, the actual good operation of more than 2 a shows the success of the optimization.
推荐资讯