Ukukhethwa kwenqubo yokuncibilikisa igesi yemvelo yesitshalo se-LNG
Kuze kube manje, kunezinqubo ezintathu ezivuthiwe zokwenziwa koketshezi emkhakheni wokwenziwa koketshezi lwegesi yemvelo: inqubo yomjikelezo wokuqandisa we-cascade, inqubo yomjikelezo wokuqandisa oxubile kanye nenqubo yomjikelezo wokuqandisa we-expander.
A) Inqubo yomjikelezo wokuqandisa we-Cascade
Umjikelezo wokuqandisa we-cascade uwumjikelezo wokuqandisa onezigaba ezintathu oneziqandisi ezifana ne-propane (noma i-propylene), i-ethane (noma i-ethylene), i-methane (noma i-nitrogen) (amazinga okushisa ahwamukayo angu-100 °F, - 121 °F, - 256 °F, ngokulandelana). Ukuqandisa kwesigaba kwenza igesi yemvelo ikwazi ukushintshanisa ukushisa neziqandisi ezihambisanayo ezibangeni eziningi zokushisa, ngaleyo ndlela ipholise futhi iyenze ibe uketshezi.
B) Inqubo yomjikelezo wokuqandisa oxubile
I umjikelezo wokuqandisa wefriji exubile inqubo esebenzisa ingxube ye-N 2 kanye no-C 1 kuya ku-C 5 ama-hydrocarbon njengesiqandisi esijikelezayo.
C) Inqubo yokwandisa umjikelezo wokuqandisa
Umjikelezo wokuqandisa ubhekisela ekuqandisweni komjikelezo we-Crowder lapho i-refrigerant enomfutho ophezulu ikhula khona ngokushesha nge-turbo expander ukuze kutholakale uketshezi lwegesi yemvelo. Ngenkathi igesi ikhula futhi iphola ku-expander, ingakhipha umsebenzi, ongasetshenziswa ukushayela i-compressor enkambisweni.
Ngokusho kwama-refrigerant ahlukene, umjikelezo wokuqandisa ungahlukaniswa kanje: umjikelezo wokuqandisa we-nitrogen expander, umjikelezo wokuqandisa we-nitrogen-methane expander, umjikelezo wokuqandisa wegesi yemvelo.
D) Ukuqhathaniswa kobuchwepheshe nomnotho kwezinqubo ezintathu
Ukusetshenziswa kwamandla komjikelezo wokuqandisa we-cascade kusethwe njengo-1, ukuqhathaniswa kwemijikelezo ehlukahlukene yokuqandisa kubalwe kuThebula 5.1-2, kanti izici zemijikelezo ehlukahlukene yokuqandisa ziqhathaniswa kuThebula 5.1-3.
Ithebula 5.1-2 Ukuqhathaniswa Kokusebenza Kahle Kwemijikelezo Ehlukahlukene Yesiqandisi
| Inqubo yokuqandisa | Ukusetshenziswa Kwamandla Okuhlobene Nokupholisa Kwe-Cascade |
| umjikelezo wokuqandisa we-cascade | 1.00 |
| umjikelezo wokuqandisa wefriji exubile | 1.15 |
| Ukupholisa Kwangaphambi Kwesikhathi R22 N 2 -CH 4 Umjikelezo Wokukhulisa Isiqandisi | 1.35 |
Ithebula 5.1-3 Ukuqhathaniswa kwezimpawu ezahlukene zomjikelezo wokuqandisa
| inkomba | ukupholisa kwe-cascade | isiqandisi esixubile | Ukuqandisa isiqandisi |
| ukusebenza kahle | phezulu | phakathi | Phansi |
| Ubunzima | phezulu | phakathi | phakathi |
| Imishini yokuthutha eyinhloko | Ama-compressor angu-3 | I-compressor eyodwa | i-compressor + i-expander |
| uhlobo lwesishintshi sokushisa | iphiko lepuleti | Iphiko lepuleti noma ipayipi lesilonda | iphiko lepuleti |
| indawo yokushintshanisa ukushisa | mkhulu | mkhulu | Okuncane |
| ukuzivumelanisa nezimo | phezulu | phakathi | phakathi |
| umthombo wesiqandisi | Kudingeka amafriji amathathu | Kudingeka amafriji angu-3 kuya kwangu-6, futhi ifriji ingakhishwa ngqo kugesi we-Feed | Kudingeka i-refrigerant eyodwa kuphela: i-nitrogen, engakhishwa emoyeni |
| tshala imali | phezulu | phakathi | Kuphezulu ngokumaphakathi |
Ilinganisa ngokuphelele izici ezifana nokutshalwa kwezimali, ukusetshenziswa kwamandla kanye nokusebenza kanye nokugcinwa, inqubo yokuncibilikisa uketshezi yale divayisi isebenzisa inqubo yokuqandisa ehlanganisiwe yesiqandisi.
URongteng ugxile ekwelapheni izinsiza zemithombo yegesi, ukuhlanzwa kwegesi yemvelo, ukubuyiselwa kwe-LPG, isitshalo se-LNG kanye nemvelo isethi yejeneretha yegesi.
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