CCUS工程管道安全停输时间模拟分析研究

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Abstract：Thechallngesassociatedwithpipeinesutdownintheproces ofpipelnetransportationinCCUSprojetsdiferfromtose inconventionaloilandgaspipelines.Themediumwithinthepipelineundergoes transienttmperature，pressre，andphasechanges， whichcauseanimpactonipelinsandaccesois.Terefore，itisparticularlyimporanttoeterineteoundaronditiosofafe shutdown. By analyzing the physical properties of CO 2 containing impurities，the safe shutdown duration is defined as the time when the mediumentersthegas-liquidtwo-phasezoneatanypoint inthepipe.Aphysicalmodelofthelong-distanceCCU pipeline isbuilt basedonOLGAsoftware，andtheinfluenceofdiferentparametersonthesafeshutdondurationisanalyzedbysinglefactorexperiment andgreycorelationmethod.Theresultsshowthatthepressureofthewholelinetendstobethesamerapidlyduringtheshutdown process，and the starting point first enters the gas-liquid two-phase zone.At inlet temperature of 45 ，outlet pressure of 9 MPa， soil temperature of and total heat transfer coefficient of 1.5W/（m2⋅∘C） ，the entry time of the starting point，the middle point，and the endpointintothegas-lqudtwophasezoneare21.223.1and70.5h，respectively.Therestartprocessinducesapressureurge， peakingatanincreaseofO.5MPa，which，however，doesnotafectthepresureofthepipeline.Itisadvisabletoextendthesafe shutdowndurationinconditionssuchaselevatedsoiltemperature，ahighertotalhattransfercoefcient，lowerinlettemperature， increasedoutletpressre，andducedpipelinethoughput，terebyfacilitatingmaitenanceandrepairoperations.Teresearchresults can be used as a reference for pipeline design and operation of similar CCUS projects.

eywords：CCUS;pipeline; shutdown; restart; simulation;transient characteristics

石油、煤炭及天然气等传统化石能源在使用过程中会排放大量的 CO2 和烟尘，这些物质是导致全球变暖的主要因素。（剩余6471字）