Ukuqhathanisa nokukhethwa kobuchwepheshe
Inqubo ye uketshezi lwegesi yemvelo ngokuyisisekelo kufaka phakathi ukwelashwa kwangaphambili kwegesi yokuphakelwa (ukuhlanzwa), uketshezi, ukucindezela umjikelezo wesiqandisi, ukugcinwa komkhiqizo, ukulayisha kanye nezinhlelo ezisizayo. Ukugeleza kwenqubo eyinhloko kufaka phakathi ukuhlanzwa kwegesi yokuphakelwa kanye noketshezi lwegesi oluhlanziwe.
Ukukhethwa kwenqubo yokuhlanzwa kwegesi yemvelo
Igesi yemvelo njengegesi yokudla kumele ihlanzwe kahle ngaphambi kokuncibilikiswa. Okusho ukuthi, susa igesi ene-asidi, amanzi kanye nokungcola kugesi yokudla, njenge-H2S, i-CO2, i-H2O, i-Hg kanye nama-hydrocarbon aromatic, ukuze kuvinjelwe ukuthi kungaqandisi emazingeni okushisa aphansi futhi kuvimbe futhi kugqwale imishini namapayipi.
A) Ithebula 3.1-1 libala amazinga okwelashwa kwangaphambi kokwelashwa kwegesi yokuphakelwa esitshalweni se-LNG kanye nokuqukethwe okuphezulu kokungcola.
| Ukungcola | Umkhawulo wokuqukethwe | Isisekelo |
| H2I-THE | ＜1ppmV | A (kuvunyelwe ukudlula umkhawulo wokuqedwa ngaphandle kokunciphisa ukukhiqizwa) |
| I-CO2 | 50～100ppmV | B (Ukuncibilika Okuphelele) |
| H2S | ＜4ppmV | C (izimfuneko zobuchwepheshe zomkhiqizo) |
| Inani eliphelele lesibabule | 10～50mg/Nm3 | C |
| I-Hg | ＜0.01μg/Nm3 | A |
| I-hydrocarbon enuka kamnandi | ≤10ppmV | A noma B |
| Ama-hydrocarbon aphelele e-naphthenic | ≤10ppmV | A noma B |
Kusukela kudatha yegesi yokuphakelayo, okuqukethwe yi-carbon dioxide kugesi yokuphakelayo kudlula indinganiso futhi kumele kuhlanzwe.
Inqubo ye-MDEA amine liquid iyinqubo efaneleke kakhulu maqondana nokusetshenziswa kwamandla, isikali sokwelashwa kanye nezindleko zokutshalwa kwezimali kanye nokusebenza. Ngakho-ke, inqubo ye-MDEA amine liquid ikhethwa ukuze kukhishwe i-acidity gas kulolu hlelo.
B) Inqubo yokuphelelwa amanzi emzimbeni ukukhetha
Ukuba khona kwamanzi kugesi yemvelo kuvame ukuholela emiphumeleni emibi kakhulu: ngaphansi kwezimo ezithile, amanzi kanye negesi yemvelo kwakha i-hydrate ukuvimba ipayipi futhi kuthinte inqubo yokupholisa ukuncibilika; Ngaphezu kwalokho, ukuba khona kwamanzi kuzophinde kubangele ukusetshenziswa kwamandla okungadingekile; Ngenxa yokushisa okuphansi kokuncibilika kwegesi yemvelo kanye nokuba khona kwamanzi, imishini izoqandiswa futhi ivalwe, ngakho-ke kumele incishiswe amanzi.
Inqubo yokuphelelwa amanzi emzimbeni ngegesi yemvelo ngokuvamile kuhlanganisa izigaba ezintathu: ukuphelelwa amanzi emzimbeni okuphansi, ukumuncwa kwe-desiccant eqinile kanye nokumuncwa kwe-solvent. Ukuhlukaniswa kokuqandisa kusetshenziswa kakhulu ukugwema i-hydrate lapho izinga lokushisa legesi yemvelo liphansi. Kodwa-ke, izinga lokushisa eliphansi elikuvumelayo lilinganiselwe futhi alikwazi ukuhlangabezana nezidingo zoketshezi lwegesi yemvelo; Ukumuncwa kwe-solvent kuvame ukufaka i-acid egxilile (ngokuvamile i-organic acid efana ne-phosphoric acid egxilile), i-glycol (i-triethylene glycol esetshenziswa njalo), njll., kodwa lezi zindlela zinokujula okuphansi kokuphelelwa amanzi emzimbeni futhi azikwazi ukusetshenziswa kumayunithi e-cryogenic; Izindlela ezivamile zokuphelelwa amanzi emzimbeni ze-solid desiccant indlela ye-silica gel, indlela ye-molecular sieve noma inhlanganisela yezindlela ezimbili.
Indlela yokumunca okuqinile kumele isetshenziswe ekumunceni amanzi emzimbeni ngenxa yokuphelelwa ...
C) Ukukhethwa kwenqubo yokususa i-mercury
Njengamanje, kunezinqubo ezimbili eziyinhloko zokususa i-mercury: indlela ye-hgsiv molecular sieve adsorption yenkampani ye-UOP e-United States kanye ne-sulfur activated carbon efakwe i-sulfur ukuze i-mercury isabele ne-sulfur ukuze ikhiqize i-mercury sulfide futhi iyimunce ku-activated carbon. Eyokuqala inezindleko eziphezulu futhi ifaneleka ngezikhathi ezinokuqukethwe okuphezulu kwe-mercury; Eyokugcina inezindleko eziphansi zokusebenza futhi ifaneleka ngezikhathi ezinokuqukethwe okuphansi kwe-mercury.
Ngakolunye uhlangothi, izindleko zokusebenza zesihlungi sama-molecule se-hgsiv ziphakeme kakhulu; Ngakolunye uhlangothi, okuqukethwe yi-mercury kugesi yokuphakelayo yeyunithi kuphansi kakhulu. Ngakho-ke, inkampani inolwazi oluphumelelayo ekusebenziseni ikhabhoni esebenzayo efakwe i-sulfur ukuze kususwe i-mercury.
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Isikhathi sokuthunyelwe: Septhemba-11-2022