天然氣壓差利用工藝對比和分析
打開文本圖片集
DOI：10.3969/j.issn.1001-2206.2025.03.010
Comparison and analysis of natural gas pressure difference utilization technology
GOU Renhui
ScienceandThologforatinteo.OoductioantofabeiOieldoayetrinCod.i6
China
Abstract：Atpresent，mostofthenaturalgaspressurediferenceutilizationprojectshaveadoptedasinglestageexpansionprocess， whichmayhaveproblemsschaslowoperatingiencysmallwergeneratio，andigequirementsforquipmentsistaeto lowtemperatures.Tosolvetheaboveproblems，tepresue-volumediagamwasusedtodescribethetheralchangeprocssofnatural gasinthesingle-stage expansionprocessandthemulti-stageexpansionprocessThesinglestage expansionproessandhemultistageexpansionprocessmodelswereestablishedbyHYSYSsoftware，andthediferencesbetweentheexpansion processswere comparedfromthespectsofoutputshaftpower，heatingpower，andcoldenergyutilization.Theresultsshowthattheoutputshaftpower oftheexpanderinesinglestageexpasioproessislargertantatintheprocsofatingbeforeexpandig，uttecoditionof coldenergyrcoveryisnotavailable.Whentheintermediatepressrevalueofthemultistageexpansionprocesisonsistentwithth constantexpansonconditioteproesspeforanceiseter，ndeoutputsaftpowerofteexpanderislos，hichisoducive totheselectionoftegeneratorsetwiththsaeistaledcapacityandconvenientforthesubsequentmaintenanceandmaintenanceof the equipment. Under the conditions of upstream natural gas supply pressre of 4 MPa， temperature of 20°C ，flow rate of 15000m3/h downstream natural gas demand pressure of 1.5 MPa，and temperature of 5°C ，the two-stage expansion process is relatively better in terms of power generation，heating power，and heat source selection.The daily power generation is 7124kW?h ，heating power is 284 （204號 kW ，andtheeatsourcecanchosecirculating water.Onlyoneexpanerisaddedcomparedwiththesingle-stage expansionprocess.he research results can provide a theoretical basis for the utilization of pressure difference energy of natural gas.
天然氣作為一次能源，其污染量和碳排放量遠(yuǎn)低于石油、煤碳等傳統(tǒng)一次能源，因此天然氣仍是實現(xiàn)我國“碳中和”“碳達(dá)峰”目標(biāo)下油氣田企業(yè)實現(xiàn)降本增效的重要抓手。（剩余5431字）