I-liquefaction yegesi yemvelo iyinqubo yokushisa ephansi. Igesi yemvelo eluhlaza ehlanziwe ingena emshinini wokushisa ukuze ipholise izinga lokushisa eliphansi, i-condensation kanye ne-undercooling, idonse futhi icindezele izinga lokushisa elingu--160 ~ 165 ℃, futhi ingena ethangini lokugcina le-LNG.
Ubudlelwano phakathi kokushisa nezinga lokushisa lokupholisa igesi yemvelo, ukufingqa kanye nokupholisa okungapholi kahle bumi kanje:
1) Izinhlobo zomjikelezo wesiqandisi
Ukuze kuncibilike igesi yemvelo, ukushisa enqubweni yokupholisa igesi yemvelo, ukufingqa kanye ne-supercooling kufanele kususwe, okungukuthi, amandla okupholisa ahambisanayo adingekayo ukushintshanisa nawo.
Isistimu yesiqandisi efakwe enqubweni ye-liquefaction ukwenza isishintshi sokushisa sifinyelele umehluko omncane wokushisa phakathi kokubandayo nokugeleza kokushisa, ukuze kutholwe ukusebenza kahle kwesiqandisi.
Uhlelo lwesiqandisi lokuncibilika kwegesi yemvelo luvuthwe kakhulu, futhi izinqubo ezivame ukusetshenziswa zihlanganisa:
Isinyathelo sesiqandisi umjikelezo
Umjikelezo wesiqandisi oxubile
Umjikelezo wesiqandisi oxubile one-Precooling
Umjikelezo obandayo wendlela yokwandisa
2) Isinyathelo sesiqandisi umjikelezo
Isinyathelo somjikelezo wesiqandisi saqala ukusetshenziswa emikhiqizweni yegesi yemvelo ewuketshezi ngo-1939. Yafakwa 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 ibe ngu-35 ~ - 40 ℃ ku-propane noma epholile ye-Freon. Ngemva kokuhlukanisa ama-hydrocarbon asindayo ngaphezu kwe-pentane, ingena esigabeni sesibili sokupholisa. Igesi ye-propane ehwamukile ku-cooler ye-propane icindezelwa yi-compressor, iphinde ifakwe uketshezi ngemva kokupholisa ngamanzi, bese igaywa kabusha ku-cooler ye-propane.
Esigabeni sesibili, i-ethane noma i-ethylene isetshenziswa njengesiqandisi, kanti igesi yemvelo ipholiswa ibe ngu-90 ~ – 100 ℃ esigabeni sesibili bese ifakwa uketshezi esigabeni sesithathu ukuze iphole. Ngemva kokucindezela nokupholisa amanzi, igesi ehwamuka ku-ethane noma i-ethylene cooler iyapholiswa futhi ifakwe uketshezi ku-propane cooler bese igaywa kabusha ukuze i-ethane noma i-ethylene cooler.
Esigabeni sesithathu, i-methane isetshenziswa njengesiqandisi. Igesi yemvelo ewuketshezi ipholile kancane ibe ngu-150 ~ - 160 ℃ ku-cooler ye-methane, bese icindezeleka nge-throttle valve. Ngemuva kokuthi izinga lokushisa lehle liye ku-162 ℃, liphonswa ethangini lokugcina le-LNG. Igesi ehwamukayo emshinini wokupholisa i-methane iyacindezelwa futhi ipholiswe ngamanzi, ipholiswe ku-propane cooler, ifakwe uketshezi ku-ethane noma i-ethylene cooler, bese igaywa kabusha kwisipholile se-methane.
Umjikelezo wesiqandisi wesinyathelo sakudala uhlanganisa izigaba zokupholisa ezimbalwa ezizimele futhi ezixhumene. Njengoba isiqandisi sivamise ukucindezelwa yi-compressor enezigaba eziningi, esigabeni ngasinye sokupholisa, isiqandisi singahwamuka ngaphansi kwezingcindezi ezimbalwa futhi sihlukaniswe sibe amazinga okushisa amaningana ukuze sipholise igesi yemvelo, futhi isiqandisi esihwamuka ngaphansi kwengcindezi ngayinye singena esiteji se-compressor esihambisanayo. ukucindezela. Esigabeni ngasinye sokupholisa, isiqandisi kuphela esihlukile, futhi inqubo yokusebenza iyafana ngokuyisisekelo.
Izinzuzo zomjikelezo wesiqandisi wesinyathelo yizi:
① Ukusetshenziswa kwamandla okuphansi;
② Isiqandisi sihlanzekile futhi asinankinga yokulinganisa;
③ Ubuchwepheshe obuvuthiwe nokusebenza okuzinzile
Ukungalungi komjikelezo wesiqandisi wesinyathelo yizi:
① Kunamayunithi amaningi futhi inqubo iyinkimbinkimbi;
② Ziningi izinto ezisizayo, futhi kufanele kube khona okokusebenza okukhethekile ekukhiqizeni nasekugcineni izinhlobonhlobo zeziqandisi;
③ Amapayipi kanye nesistimu yokulawula kuyinkimbinkimbi futhi akulula ukuyinakekela
Isikhathi sokuthumela: Sep-26-2021
