Igesi yemvelo njengegesi yokuphakelayo kumele ihlanzwe kahle ngaphambi kokuyincibilikisa. Okusho ukuthi, ukususa igesi ene-asidi, amanzi kanye nokungcola kugesi yokuphakelayo, njenge-H2S, CO2, H2O, Hg kanye nama-hydrocarbon aromatic, ukuze kuvinjelwe ukuthi angaqandisi ekushiseni okuphansi futhi kuvimbe futhi kugqwale imishini namapayipi. Ithebula 3.1-1 libala amazinga okwelashwa kwangaphambi kokwelashwa kwegesi yokudla esitshalweni se-LNG kanye nokuqukethwe okuphezulu kokungcola.
Ithebula okuqukethwe okuphezulu kokungcola okuvunyelwe kwegesi yokuphakelayo ye-LNG
| 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) Ukukhetha inqubo yokuphelelwa amanzi emzimbeni
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 yigesi yemvelo ngokuvamile ihlanganisa izigaba ezintathu: ukuphelelwa amanzi yigesi ekushiseni 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-TEG evame ukusetshenziswa), njll., kodwa lezi zindlela zinokujula okuphansi kokuphelelwa amanzi futhi azikwazi ukusetshenziswa kumayunithi e-cryogenic; Izindlela ezivamile zokuphelelwa amanzi yigesi ye-solid desiccant yindlela 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 yokumunca i-HgSIV molecular sieve 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 yokuphakelwa kweyunithi kuphansi kakhulu. Ngakho-ke, inkampani inolwazi oluphumelelayo ekusebenziseni ikhabhoni esebenzayo efakwe isibabule ukuze kususwe i-mercury.
Isikhathi sokuthunyelwe: Jan-14-2022