Ukuncibilika kwegesi yemvelo kuyinqubo yokushisa okuphansi. Igesi yemvelo eluhlaza ehlanziwe ingena ku-heat exchanger ukuze iphole, ifinyeze futhi iphole ngaphansi kokushisa okuphansi, ipholise futhi inciphise ukucindezeleka ekushiseni okungu-160 ~ 165 ℃, bese ingena ethangini lokugcina i-LNG.
Ubudlelwano phakathi kokushisa kanye nokushisa kokupholisa igesi yemvelo, ukujiya kanye nokupholisa okungaphelele bungokulandelayo:
1) Izinhlobo zomjikelezo wokuqandisa
Ukuze kuncibilikiswe igesi yemvelo, ukushisa okusenqubo yokupholisa igesi yemvelo, ukujiya kanye nokupholisa kakhulu kumele kususwe, okungukuthi, kudingeka amandla okupholisa ahambisanayo ukuze kushintshwe nayo.
Uhlelo lokuqandisa olufakwe enqubweni yokuncibilikisa uketshezi lwenzelwe ukwenza i-heat exchanger ifinyelele umehluko omncane wokushisa phakathi kokugeleza kokubanda nokushisa, ukuze kutholakale ukusebenza kahle kakhulu kokuqandisa.
Uhlelo lokuqandisa uketshezi lwegesi yemvelo selukhulile kakhulu, futhi izinqubo ezivame ukusetshenziswa zifaka:
Isinyathelo somjikelezo wokuqandisa
Umjikelezo wokuqandisa wefriji exubile
Umjikelezo wokuqandisa wefriji ohlanganisiwe kanye ne-Precooling
Indlela yokwandisa umjikelezo obandayo
2) Isinyathelo somjikelezo wokuqandisa
Umjikelezo wokuqandisa wezinyathelo waqala ukusetshenziswa emikhiqizweni yegesi yemvelo encibilikisiwe ngo-1939. Wafakwa eCleveland e-United States, kusetshenziswa i-NH3 ne-C2H4 njengeziqandisi zesigaba sokuqala nesesibili.
Esigabeni sokuqala, i-propane noma i-Freon isetshenziswa njengesiqandisi. Igesi yemvelo ehlanziwe ipholiswa ku- – 35 ~ – 40 ℃ ku-propane noma ku-Freon cooler. Ngemva kokuhlukanisa ama-hydrocarbon asindayo ngaphezu kwe-pentane, ingena esigabeni sesibili sokupholisa. Igesi ye-propane ephuma ku-propane cooler icindezelwa yi-compressor, iphinde incibilikiswe ngemva kokupholisa yi-water cooler, bese iphinda isetshenziswe ku-propane cooler.
Esigabeni sesibili, i-ethane noma i-ethylene isetshenziswa njengesiqandisi, bese igesi yemvelo ipholiswa ibe ngu-90 ~ – 100 ℃ esigabeni sesibili bese ifakwa uketshezi esigabeni sesithathu ukuze iphole. Ngemva kokucindezela nokupholisa ngamanzi, igesi ephuma ku-ethane noma ku-ethylene cooler iyapholiswa bese ifakwa uketshezi ku-propane cooler bese iphinda isetshenziswe ku-ethane noma ku-ethylene cooler.
Esigabeni sesithathu, i-methane isetshenziswa njengesiqandisi. Igesi yemvelo encibilikisiwe ipholiswa ngaphansi kuka -150 ~ -160 ℃ esiqandisini se-methane, bese incishiswa nge-valve ye-throttle. Ngemva kokuba izinga lokushisa lehle laya ku -162 ℃, iphonswa ethangini lokugcina i-LNG. Igesi ephuma esiqandisini se-methane iyacindezelwa bese ipholiswa ngamanzi, ipholiswe esiqandisini se-propane, incishiswe esiqandisini se-ethane noma se-ethylene, bese iphinda isetshenziswe esiqandisini se-methane.
Umjikelezo wokuqandisa wesinyathelo sakudala uhlanganisa izigaba eziningana zokupholisa ezizimele nezixhumene. Njengoba i-refrigerant ivame ukucindezelwa yi-compressor enezigaba eziningi, esigabeni ngasinye sokupholisa, i-refrigerant inganyamalala ngaphansi kwezingcindezi eziningana futhi ihlukaniswe ngamazinga okushisa amaningana ukuze ipholise igesi yemvelo, kanti i-refrigerant enyamalala ngaphansi kwengcindezi ngayinye ingena esigabeni se-compressor esifanele sokucindezela. Esigabeni ngasinye sokupholisa, i-refrigerant kuphela ehlukile, futhi inqubo yokusebenza iyafana ngokuyisisekelo.
Izinzuzo zomjikelezo wokuqandisa wesinyathelo yilezi:
① Ukusetshenziswa kwamandla okuphansi;
② Isiqandisi sihlanzekile futhi asinankinga yokulinganisa;
③ Ubuchwepheshe obuvuthiwe kanye nokusebenza okuzinzile
Izinkinga zomjikelezo wokuqandisa wesinyathelo yilezi:
① Kunezinhlobo eziningi futhi inqubo iyinkimbinkimbi;
② Kunemishini eminingi yokusiza, futhi kufanele kube nemishini ekhethekile ekukhiqizeni nasekugcineni izinhlobo ezahlukene zeziqandisi;
③ Uhlelo lwamapayipi kanye nokulawula luyinkimbinkimbi futhi alulungele ukugcinwa
Isikhathi sokuthunyelwe: Septhemba-26-2021