Feasibility analysis of large span compensation platform for LNG terminal

doi:10.16085/j.issn.1000-6613.2023-1212

Abstract

Abstract:

During the transportation process of liquefied natural gas, the low-temperature state will be transmitted to the pipe wall, causing displacement stress in the pipeline due to cold shrinkage. Compensation platforms need to be installed on the trestle to solve such problems. Building a compensation platform requires a large amount of resources with an investment of at least ten million yuan. Currently, there is no systematic analysis results on the span of compensation platforms in China. This article used theoretical analysis and finite element software simulation to divide the bridge into multiple design schemes for large span compensation platforms, and compared and analyzed the feasibility of obtaining the maximum span of the compensation platform. This research achievement would to some extent fill the gap in the field of large span compensation platform implementation and provide reference for the subsequent design of LNG long trestle transportation.

Key words: LNG, displacement stress, compensate for the platform, trestle, large span

摘要：

液化天然气在输送过程中会将低温状态传递到管壁上，导致管道冷缩产生位移应力，需要在栈桥上设置补偿平台以解决此类问题。而建设一个补偿平台需要大量资源，投资至少在千万元以上，目前国内暂没有针对补偿平台跨距的系统性分析成果。本文通过理论分析和有限元软件模拟，将栈桥划分为多个大跨距补偿平台的设计方案，比较分析得出补偿平台最大跨距的可行性方案。该研究成果将能一定程度上填补大跨距补偿平台实现领域的空白，为后续液化天然气长栈桥输送设计提供参考。

关键词: 液化天然气, 位移应力, 补偿平台, 栈桥, 大跨距

CLC Number:

TE832

YAN Qing, ZHANG Yunfeng, ZHAO Minwei, SONG Ning, GAO Hui, ZHOU Jing. Feasibility analysis of large span compensation platform for LNG terminal[J]. Chemical Industry and Engineering Progress, 2023, 42(S1): 158-165.

闫青, 张云峰, 赵敏伟, 宋宁, 高辉, 周静. LNG接收站大跨距补偿平台的可行性分析[J]. 化工进展, 2023, 42(S1): 158-165.

Figures/Tables 18

References 20

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项目名称	栈桥长度/m	补偿平台间距/m
福建莆田LNG	345	90
辽宁大连LNG	154	130
浙江舟山LNG	498	150
山东董家口LNG	766	200
天津LNG	184	127
广东粤东LNG	800	100
上海LNG	507	90
江苏如东LNG	1970	196
河北唐山LNG	2107	192
江苏启东LNG	3838	200

项目名称	栈桥长度/m	补偿平台间距/m
福建莆田LNG	345	90
辽宁大连LNG	154	130
浙江舟山LNG	498	150
山东董家口LNG	766	200
天津LNG	184	127
广东粤东LNG	800	100
上海LNG	507	90
江苏如东LNG	1970	196
河北唐山LNG	2107	192
江苏启东LNG	3838	200

工况	不同跨距下的最大荷载/N
工况	196米	212米	232米	254米	282米
地震	-73871	-88808	-85220	-75396	-204363
风	-92448	-106523	-103773	-95687	-222241
水锤	-188238	-500019	-526572	-717231	-1331045
预冷	-87655	-92808	-93013	-96856	-245608

工况	不同跨距下的最大荷载/N
工况	196米	212米	232米	254米	282米
地震	-73871	-88808	-85220	-75396	-204363
风	-92448	-106523	-103773	-95687	-222241
水锤	-188238	-500019	-526572	-717231	-1331045
预冷	-87655	-92808	-93013	-96856	-245608

工况	不同跨距下的最大位移/mm
工况	196米/mm	212米/mm	232米/mm	254米/mm	282米/mm
地震	-198.8	-220.2	-241.3	-262.1	-303.4
风	-198.9	-220.2	-241.3	-262.1	-303.4
水锤	-248.6	-269.7	-291.1	-311.7	-352.3
预冷	-198.9	-220.3	-241.5	-261.9	-303.6