天然气长输管道改输氢气投产置换过程模拟分析
邱姝娟 , 吕佩遥 , 于玥田 , 王宇骁 , 李欣泽 , 邢晓凯
现代化工 ›› 2026, Vol. 46 ›› Issue (S1) : 356 -362.
天然气长输管道改输氢气投产置换过程模拟分析
Simulation and analysis of the commissioning and replacement process in long-distance natural gas pipelines converted to hydrogen transport
氢气作为清洁能源载体是碳中和关键路径,天然气管道改输氢气优势显著。以某改输工程为例,构建投产置换动态模型,模拟氮气封存、氢气置换及升压全流程并与天然气管道对比。研究结果表明:氮气封存阶段,氮气封存耗量约8 000 m3、耗时434 min;置换阶段,N2头与H2头到达末站分别需19.78、21.27 h;管内压力升高至4.5 MPa时耗时231.4 h,氢气用量1.946×106 m3;氢气置换氮气时长较天然气短1.9 h,3.0 MPa前氢气耗量与耗时更大;100 km内混气段长度为350~560 m,FLUENT软件模拟结果比经验公式保守,为氢气长输管道建设与安全投产提供理论及技术参考。
Hydrogen,as a clean energy carrier,is a key pathway to carbon neutrality,and repurposing natural gas pipelines for hydrogen transport has significant advantages.Taking a certain repurposing project as an example,this paper constructs a dynamic commissioning and replacement model,simulating the entire process of nitrogen sealing,hydrogen replacement,and pressurization,and compares it with natural gas pipelines.The research results show that:during the nitrogen sealing phase,the nitrogen consumption is about 8 000 m3,and it takes 434 minutes;during the replacement phase,the time for the N2 and H2 fronts to reach the end station is 19.78 h and 21.27 h,respectively;increasing the pipeline pressure to 4.5 MPa takes 231.4 h,with a hydrogen consumption of 1.946×106 m3;the hydrogen replacement time for nitrogen is 1.9 h shorter than that for natural gas,and the hydrogen consumption and duration before reaching 3.0 MPa are greater;within 100 km,the mixed gas section length is 350-560 m,and Fluent simulation results are more conservative than empirical formulas.This study provides theoretical and technical references for the construction and safe commissioning of long-distance hydrogen pipelines.
氢气管道 / 管道投产 / 置换过程 / 混气规律 / 数值模拟
hydrogen pipeline / pipeline commissioning / replacement process / gas mixing laws / numerical simulation
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管网集团(新疆)联合管道有限责任公司天然气管道改输氢气轻烃清除及注氢置换投产工艺控制技术服务(XQHX20250095)
新疆维吾尔自治区重点研发任务专项“天然气管道改输氢气关键技术研究”(2024B01003)
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