大型催化裂化装置反应油气管道的柔性设计

Piping flexibility design for oil vapor line of large FCC unit

指出了催化裂化装置由于大型化引发的反应油气管道设计难以解决的关键性问题,即油气管道易对分馏塔油气入口产生过大的热膨胀作用力。分析传统解决方案应对装置大型化的局限性,阐述适用的解决途径,提出新颖独特的解决方案:立管呈折线形状,用以吸收竖直方向的热膨胀;立管上、下部分别设刚性支撑,中部斜管上设置弹簧吊架,下部水平管上设若干弹性吊架。计算结果表明,新方案的热膨胀补偿效能明显优于传统方案。

The critical difficult problem resulted from the unit＇ s large-scalization in the design of FCC oil vapor transfer line is presented, i.e. the excessive thermal expansion force of oil vapor line on the fractionator oil vapor inlet. The limitation of conventional solution in large-scalization is analyzed and effective practical solutions are described. The new unique solution is recommended, in which fold type standpipe is installed to absorb the vertical thermal expansion, the rigid supports are provided at upper and lower parts of standpipe, spring hanger is supplied for middle fold pipe and flexible hangers are installed for lower horizontal pipe. The calculation shows that the new thermal expansion compensation design is obviously superior to the conventional design in thermal expansion compensation performance.