摘要
中俄东线天然气管道是目前国内输气量最大的跨国输气管道,黑河首站是该管道在我国境内的首座站场,设有跨国天然气贸易计量比对设施。该设施含有多路计量支路,各计量支路的流量分配不均,有可能影响计量结果的可靠性与准确性。为了避免黑河首站计量系统管汇的偏流问题,采用有限元的方法,对该计量系统进行了流场分析和模拟。研究结果表明:①基于有限元模拟进行计量系统管汇安装方案设计,较之于工程上通过各支路沿程摩阻平衡来避免偏流的设计方法,提升了设计的精细度和可信度;②黑河首站在设计工况下,“同侧进出”安装形式能更有效地避免计量系统管汇偏流现象,刷新了多支路管汇常采用“异侧进出”安装形式避免偏流的认知经验;③不同备用支路选择会对偏流效果产生影响,黑河首站“同侧进出”的安装形式中,第1、2支路备用时,偏流量最小;④基于分析结果确定了黑河首站计量系统的安装形式及推荐运行方案。结论认为,该研究成果有助于确保黑河首站比对计量系统的准确性、保障供需双方的经济利益,还可以为其他跨国天然气贸易计量比对系统管汇偏流问题的解决提供借鉴。
China–Russian Eastern Gas Pipeline is the transnational gas pipeline whose gas delivery rate is the highest in China,and the Heihe initial station is the first station of the China–Russian Eastern Gas Pipeline in the territory of China,which is equipped with a measurement comparison facility for transnational natural gas trade.This facility has multiple measurement branches and the flow distribution in different branches is not uniform,which may influence the reliability and accuracy of measurement results.In order to avoid the bias current in the manifold of the measurement system at the Heihe initial station,this paper adopted the finite element simulation method to analyze and simulate the flow field in the measurement system.And the following research results were obtained.First,in engineering,bias current is usually avoided by balancing the friction and resistance along each branch.And compared with this design method,the installation scheme design of the manifold of measurement system based on finite element simulation is more precise and reliable.Second,under the designed working conditions at the Heihe initial station,the installation form of"inlet and outlet on the same side"can avoid the bias current in the manifold of the measurement system more effectively,refreshing the cognitive experience that the installation form of"inlet and outlet on the opposite side"is often adopted in multi-branch manifold to avoid the bias current.Third,the selection of different standby branches influences the bias current.Under the installation form of"inlet and outlet on the same side"at the Heihe initial station,the bias current is the least when the first and second branches are selected as the standby.Fourth,based on analysis results,the installation form of the measurement system at the Heihe initial station is determined and the operation scheme is recommended.In conclusion,the research results are conducive to the accuracy guarantee of the measurement comparison system at the Heihe initial station and ensure the economic benefits of the supply and demand sides.What's more,they provide reference for solving the bias current in the manifolds of other measurement comparison systems in transnational natural gas trade.
作者
陆美彤
毛平平
赵仕浩
刘亮
姜晗
LU Meitong;MAO Pingping;ZHAO Shihao;LIU Liang;JIANG Han(China Petroleum Pipeline Engineering Corporation,Langfang,Hebei 065000,China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2020年第10期133-138,共6页
Natural Gas Industry
基金
中国石油天然气集团有限公司科研项目“大口径天然气管道建设关键技术研究”(编号:2016B-3004)。
关键词
中俄东线天然气管道
黑河首站
跨国天然气贸易
计量比对
流量分配
管汇偏流
数值模拟
China–Russian Eastern Gas Pipeline
Heihe initial station
Transnational natural gas trade
Measurement comparison
Flow distribution
Bias current in the manifold
Numerical simulation
