Ikhwalithi Ephezulu Abahlinzeki Bendawo Yegesi ye-LNG yase-China - Ngokwezifiso i-2~10×104m3m3 / D imboni yokuncibilikisa igesi yemvelo - Rongteng

Isingeniso

Ukwakhiwa kwephrojekthi 50 × 10⁴m³/ D iphrojekthi yokuncibilika kwegesi yemvelo kanye nezinsiza ezisekelayo kanye nethangi elilodwa elingu-10000 m3 LNG eligcwele umthamo. Amayunithi enqubo eyinhloko ahlanganisa i-feed gas pressurization, i-decarbonization unit, i-dehydration unit, i-mercury neyunithi yokususwa kwe-hydrocarbon esindayo, iyunithi ye-liquefaction, isitoreji sefriji, i-flash steam pressurization, ipulazi le-LNG ithangi kanye nezindawo zokulayisha.

Ngabe kusebenza kanjani ukwelashwa kwegesi yemvelo ngaphambi kokuncibilika?

Umthombo wokudla kwezitshalo ufika ngendlela enegesi ngamapayipi. Igesi yemvelo ekhishwe emhlabathini iqukethe ukungcola, amanzi kanye nolunye uketshezi oluhambisanayo, ngakho-ke ngaphambi kokuba kuqhume uketshezi, igesi idinga ukudlula inqubo yokwelapha ukuze isuse izinto ezingafuneki. Igesi idlula ochungechungeni lwemikhumbi, ama-compressor namapayipi lapho igesi ihlukaniswa kancane kancane noketshezi olusindayo nokungcola.

Okokuqala, amanzi kanye ne-condensate ziyasuswa, kulandeleukususwa kwegesi ye-asidi(i-carbon dioxide, CO2), i-hydrogen sulfide (H2S) ne-mercury (Hg). Lezi zinto azifunwa, njengoba zingase zidale ukwakheka kweqhwa ngesikhathi sokuncibilika kanye nokugqwala kwamapayipi kanye nezishintshisi zokushisa ze-LNG. Ingxube esele iphole ngaphambi kwesikhathi, kanti ezinye, ezisindayo, uketshezi lwegesi yemvelo lube seluhlukaniswa nengxube ngaphambi kokuthi kuqhume uketshezi. Ama-hydrocarbon akhishiwe angagcinwa futhi athengiswe ngokuhlukana. Igesi esele ngokuvamile iqukethe i-methane kanye ne-ethane ethile, ekhishwa ekuxutshweni kwayo.

Ngabe isebenza kanjani i-LNG?

Ukuthutha igesi ecindezelwe amabanga amade ngamapayipi kungabiza futhi kudle isikhathi, kodwa ngokupholisa igesi yemvelo iye ku-162°C, iphenduka ibe uketshezi oluwuketshezi, futhi umthamo wayo uyancipha izikhathi ezingu-600. Lokhu kwenza kube nokwenzeka ukuthutha igesi ngomkhumbi, futhi le nqubo yenziwa yenzeka embonini ye-LNG. I-liquefaction kanye nenqubo yokupholisa ye-LNG isekelwe emijikelezweni yesiqandisi se-thermodynamic, futhi yenzeka kuma-cryogenic heat exchangers, abamba ukushisa kwegesi yemvelo. I-Flash gas ne-BOG ingasetshenziswa njengophethiloli wezinjini zomoya ezisetshenziselwa ukukhiqiza ugesi endaweni.

Sihlukanisa kakhulu phakathi kwezinhlobo ezimbili eziyinhloko zezinqubo zokuncibilika: inqubo ye-cascade yakudala lapho kusetshenziswa iziqandisi ezihlukene ezihwamuka kumazinga okushisa ahlukene, kanye nomjikelezo wesiqandisi oxubile lapho inhlanganisela eqhubekayo, eyodwa yeziqandisi ipholiswa khona. Noma iyiphi indlela, umkhiqizo wokugcina yi-LNG, egcinwa emathangini e-cryogenic esizeni ngaphambi kokuthunyelwa.