内罐泄漏工况下大型LNG外储罐罐壁温度作用分析
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摘要
在考虑储罐内罐中孔泄漏的情况下,采用适当的泄漏源模型,计算了高液位情况下泄漏完成所需时间。借助ANSYS有限元分析软件,对储罐的动态泄漏过程中的温度场和泄漏完成后外罐的位移场和应力场进行分析。结果表明:内罐泄漏是一个缓慢的过程,泄漏完成需36h;混凝土罐壁温度场随环形空间中的液面高度变化而变化;超低温作用引起罐壁较大变形和内力。本文分析结果可以为泄漏工况下储罐结构的安全性设计分析提供一定的参考。
Considering the conditions of medium hole leadage of the inner tank,the complete leakage time for high level were calculated in this paper by using the appropriate source model of leaks.The temperature of'LNG tank in dynamic leakage conditions and the displacement and stress profile of the complete leakage were analyzed by using ANSYS.The results showed that the inner tank leakage process of full-containment was slow,it lasted 36 hours.The temperature of outer tank changed with liquid level in annular space.Ultra-low temperature caused large deformation and stress to the concrete outer wall.The results of the analysis could give some references to the security design and analysis of tank structure.
Considering the conditions of medium hole leadage of the inner tank,the complete leakage time for high level were calculated in this paper by using the appropriate source model of leaks.The temperature of'LNG tank in dynamic leakage conditions and the displacement and stress profile of the complete leakage were analyzed by using ANSYS.The results showed that the inner tank leakage process of full-containment was slow,it lasted 36 hours.The temperature of outer tank changed with liquid level in annular space.Ultra-low temperature caused large deformation and stress to the concrete outer wall.The results of the analysis could give some references to the security design and analysis of tank structure.
引文
[1]成永强,田士章,魏念鹰.LNG接收站试运投产中储罐冷却的相关问题[J].油气储运.2013,32(5):517~520Cheng Tongqiang,Tian Shizhang,Wei Nianying,Hu Wenjiang.Problems related to storage tank cooling in the commissioning and test running of LNG tenninal[J].Oil and gas Storage and Transporta tion.2013,32(5):517~520
[2]Bsenl4620-l,Design and Manufacture of Site Built,Vertical,Cylindrical,Flat-Bottomed Steel Tanks for the Storage of Refrigerated,Liquefied Gases with Operating Temperatures Between 0℃~-165℃-Part 1:General[S].2006
[3]谢剑,李建军.超低温作用下LNG储罐热-结构耦合分析[J].特种结构.2013,30(1):44-47
[4]张钊.LNG泄漏时外罐壁传热特性及地震响应研究[D].硕士论文,东北石油大学,2012Zhang Zhao.Reseach for the heat transfer and the seismic response of LNG outside wall during leaking[D].Master,Northeast University of Petroleum,2012
[5]Crowl DA,Louvar JF.Chemical Process Safety Fundamentals with Applications[M].2006
[6]李金光,郑建华,高贤.全容式LNG储罐内罐泄漏源模型[J].油气运输.2012,31(10):777~779Li Jinguang,Zheng Jianhua,Gao Xian.Inner tank leak source model of full-containment LNG storage tank[J].Oil and gas Storage and Transportation.2012,31(10):777-779
[7]周超,王志荣.立式储罐液体泄漏过程的模拟实验[J].油气运输.2011,30(4):310~313Zhou Chao and Wang Zhirong.Leakage process simulation of vertical tank[J].Oil and gas Storage and Transportation.2011,30(4):310~313
[8]王琪,杨建江.偶然荷载工况作用下LNG储罐荷载的选取组合[J].特种结构.2010,27(6):13~16
[2]Bsenl4620-l,Design and Manufacture of Site Built,Vertical,Cylindrical,Flat-Bottomed Steel Tanks for the Storage of Refrigerated,Liquefied Gases with Operating Temperatures Between 0℃~-165℃-Part 1:General[S].2006
[3]谢剑,李建军.超低温作用下LNG储罐热-结构耦合分析[J].特种结构.2013,30(1):44-47
[4]张钊.LNG泄漏时外罐壁传热特性及地震响应研究[D].硕士论文,东北石油大学,2012Zhang Zhao.Reseach for the heat transfer and the seismic response of LNG outside wall during leaking[D].Master,Northeast University of Petroleum,2012
[5]Crowl DA,Louvar JF.Chemical Process Safety Fundamentals with Applications[M].2006
[6]李金光,郑建华,高贤.全容式LNG储罐内罐泄漏源模型[J].油气运输.2012,31(10):777~779Li Jinguang,Zheng Jianhua,Gao Xian.Inner tank leak source model of full-containment LNG storage tank[J].Oil and gas Storage and Transportation.2012,31(10):777-779
[7]周超,王志荣.立式储罐液体泄漏过程的模拟实验[J].油气运输.2011,30(4):310~313Zhou Chao and Wang Zhirong.Leakage process simulation of vertical tank[J].Oil and gas Storage and Transportation.2011,30(4):310~313
[8]王琪,杨建江.偶然荷载工况作用下LNG储罐荷载的选取组合[J].特种结构.2010,27(6):13~16
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