Susa ukungcola okuyingozi kugesi yokuphakelayo nezinto ezingase ziqine ngesikhathi senqubo ye-cryogenic. Njenge-hydrogen sulfide, i-carbon dioxide, amanzi, i-hydrocarbon esindayo kanye ne-mercury. Igesi yokuphakelayo ephathwa izinhlobo ezahlukene zezitshalo ze-LNG ihlukile, ngakho-ke izindlela zokwelashwa nezinqubo nazo zihlukile.
Igesi ye-asidi ngokuvamile i-H2S, CO2, cos, RSH kanye nezinye izinto ezingcolile zesigaba segesi. Ukususwa kwegesi ye-asidi kuvame ukubizwa ngokuthi i-desulfurization kanye ne-decarbonization, noma i-desulfurization ngokwesiko. Lapho kuhlanzwa igesi yemvelo, i-H2S kanye ne-CO2 kungasuswa ngesikhathi esisodwa, ngoba lezi zingxenye ezimbili zingasuswa ndawonye ngendlela ye-alcohol amine kanye nokuhlanzwa kwe-molecular sieve adsorption.
2.3.2 Ukukhetha indlela yokususa i-sulfurization
Eyunithi yokuncibilikisa igesi yemvelo, kunezindlela ezintathu ezivamile zokuhlanza, okuyi-alcohol amine method, hot potash method (benfied) kanye ne-sulfonol amine method.
I-Mercury: ukuba khona kwe-mercury kungalimaza kakhulu imishini ye-aluminium. Uma i-Mercury (kufaka phakathi i-mercury elemental, ama-ion e-mercury kanye nama-organic mercury compounds) ikhona, i-aluminium izosabela namanzi ukuze ikhiqize imikhiqizo yokugqwala emhlophe eyimpuphu, okuzolimaza kakhulu izakhiwo ze-aluminium. Inani elincane kakhulu le-mercury lanele ukubangela umonakalo omkhulu imishini ye-aluminium, kanti i-Mercury izophinde ibangele ukungcola kwemvelo kanye nokulimala kwabasebenzi ngesikhathi sokulungiswa. Ngakho-ke, okuqukethwe kwe-mercury kufanele kulinganiselwe ngokuqinile. Ukususwa kwe-mercury kusekelwe ekusabeleni kwe-mercury ne-sulfur ku-reactor ye-catalytic.
I-hydrocarbon esindayo: ibhekisela kuma-hydrocarbon angaphezu kuka-C5+. Kuma-hydrocarbon, lapho isisindo sama-molecule sishintsha sisuka kokuncane siye kokukhulu, iphuzu laso lokubila liyashintsha lisuka kokuphansi liye kokuphezulu. Ngakho-ke, emjikelezweni wokujiya kwegesi yemvelo, ama-hydrocarbon esindayo ahlala ejiya kuqala. Uma i-hydrocarbon esindayo ingahlukaniswanga kuqala, noma ihlukaniswe ngemva kokujiya, i-hydrocarbon esindayo ingase iqine futhi ivimbe imishini. Ama-hydrocarbon esindayo asuswa kancane ngesihlungo sama-molecule kanye nezinye izinto ezifaka amanzi emzimbeni ngesikhathi sokuphelelwa amanzi emzimbeni, kanti okunye kuhlukaniswa ngokuhlukaniswa kwe-cryogenic.
I-Cos: ingamanziswa ngamanzi amancane kakhulu ukuze yakhe i-H2S ne-CO2, okubangela ukugqwala emishinini. Kulula ukuyixuba ne-propane etholakele. Ngokuvamile isuswa kanye ne-H2S ne-CO2 ngesikhathi sokunciphisa i-acid.
I-Helium: igesi yemvelo ingumthombo oyinhloko we-helium futhi kufanele ihlukaniswe futhi isetshenziswe. Inenani eliphezulu lokusetshenziswa ngokuhlanganiswa kokuhlukaniswa kwe-membrane kanye nokuhlukaniswa kwe-cryogenic.
I-nitrogen: ukwanda kokuqukethwe kwayo kuzokwenza kube nzima kakhulu uketshezi lwegesi yemvelo. Indlela yokugcina ye-flash ivame ukusetshenziswa ekususweni okukhethekile ku-LNG.
Ingxenye eyinhloko yegesi yemvelo yi-methane (CH4), kanti izinga layo lokubila elijwayelekile lingu-111k (-162 ℃).
Ubuningi be-methane ewuketshezi endaweni yokubila ejwayelekile bungu-426kg / m3, kanti ubuningi be-methane ewugesi esimweni esijwayelekile bungu-0.717kg / m3, ngomehluko ophindwe izikhathi ezingaba ngu-600. Umehluko omkhulu ngevolumu yisona sizathu esiyinhloko sokugcina kanye nokuthuthwa kwegesi yemvelo encibilikisiwe.
Isikhathi sokuthunyelwe: Disemba-03-2021