气力驱动废树脂长距离输送设计研究和验证

Design Research and Verification of Pneumatic Driven Longdistance Transportation of Spent Resin

为解决放射性废树脂长距离管道输送过程中废树脂沉积造成管道局部热点的工程难题,通过流动理论计算和管道综合受力分析,并结合实际的工程设计,建设了一套约1300 m的废树脂长距离输送管道系统。该管道采用内壁整体光滑设计思想,管道热补偿利用管道自补偿、大弯曲半径方形补偿器和空间Z形补偿结构等,阀门、管件均订制与管道内径匹配,安装完毕后,进行了液压、模拟输送和工程验证试验。验证结果表明,该废树脂输送管道解决了长距离管道输送过程中废树脂沉积造成管道局部热点的工程问题,系统固有安全性高、操作简便,显著缩短操作时间、减少二次放射性废物产生、降低人员劳动强度和受照剂量,工程应用效果良好。

In order to solve the engineering problem of local radioactive hot spots caused by spent resin deposition in the process of radioactive spent resin long-distance pipeline transportation,a set of 1300 m spent resin ultra-long-distance pipeline system was constructed on the basis of theoretical calculation of pneumatic driven flow,comprehensive stress analysis of pipeline and engineering design combined with field practice.The pipeline adopts the design idea of overall smooth inner wall,pipeline self-compensation for the thermal expansion compensation,large bending radius square compensator and space Z-shaped compensation structure,etc.The valves and fittings are customized to match the inner diameter of the pipeline.After installation,the hydraulic test,simulated transportation test and engineering verification are carried out.The verification results show that the spent resin transportation pipeline has solved the engineering problem of local hot spots caused by spent resin deposition during long-distance pipeline transportation.The system has high inherent safety and simple operation,which significantly shortens the operation time,reduces the generation of secondary radioactive waste,reduces the labor intensity and radiation dose of personnel,and has good engineering application effect.