埋地罐的外压计算、结构优化及防腐

External Pressure Calculation,Structural Optimization and Corr osion Prevention of Buried Tanks

以ABS项目中1,3-丁二烯埋地罐为例,分别从盛装介质为极度高度危害的埋地罐的外压计算、结构设计、腐蚀防护方面遇到的难点进行分析,基于EMMUA的覆土外压计算方法,提出将设备设计负压与覆土外压叠加作为储罐的外压计算压力;采用接管集中布置,使用隔离环结构,鞍座底板增设PTFE板等方法优化了设计结构,以便于检修;提出使用防腐试板的方法,解决了埋地罐的外表面腐蚀检测难的问题,为储罐安全运行提供保障。

Taking the buried 1,3-butadiene tank in the ABS project as an example,the difficulties encountered in the external pressure calculation,structural design,and corrosion protection of buried tanks containing extremely hazardous media were analyzed.Based on the EMMUA method for calculating the external pressure of soil cover,the superposition of the equipment design negative pressure and the external pressure of soil cover was proposed as the external pressure calculation pressure of the tank.The design structure was optimized by adopting centralized arrangement of nozzles,using isolation ring structure,and adding PTFE plates to the saddle bottom plate,which facilitated maintenance.The method of using corrosion resistant test plates was proposed to solve the problem of difficult corrosion detection on the outer surface of buried tanks,providing assurance for the safe operation of the tanks.