A ga-asacha gas sitere n'okike nke ọma tupu e wepụ ya n'ime mmiri. Ya bụ, iwepụ gas acid, mmiri na ihe ndị na-adịghị ọcha dị na gas nri, dịka H.2S, Kọntinent2, H2O, Hg na hydrocarbons na-esi ísì ụtọ, iji gbochie ha ịjụ oyi na obere okpomọkụ ma gbochie ma mebie akụrụngwa na paịpụ. Tebụl 3.1-1 depụtara ụkpụrụ tupu ọgwụgwọ nke gas nri na osisi LNG na ọdịnaya kachasị nke ihe na-adịghị ọcha.
Oke ọdịnaya adịghị ọcha nke gas nri LNG a na-anabata na tebụl
| adịghị ọcha | Oke ọdịnaya | Ntọala |
| H2IHE | ＜1ppmV | A (a na-ekwe ka ọ gafere oke mgbasa, na-enweghị oke mmepụta) |
| Kọlọ2 | 50～100ppmV | B (Ngwakọta kachasị mma) |
| H2S | ≥4ppmV | C (ihe achọrọ maka teknụzụ ngwaahịa) |
| Mkpokọta ọdịnaya sọlfọ | 10~50mg/NM3 | C |
| Hg | 3 | A |
| Hydrocarbon na-esi ísì ụtọ | ≤10ppmV | A ma ọ bụ B |
| Mkpokọta hydrocarbons naphthenic | ≤10ppmV | A ma ọ bụ B |
Site na data nke gas nri, ọdịnaya nke carbon dioxide dị na gas nri gafere ọkọlọtọ ma a ghaghị ịsacha ya.
Usoro mmiri mmiri MDEA amine bụ usoro kachasị mma n'ihe gbasara oriri ike, nha ọgwụgwọ na itinye ego na ọnụ ahịa ọrụ. Ya mere, a na-ahọrọ usoro mmiri mmiri MDEA amine maka gas deacidification na atụmatụ a.
B) Nhọrọ usoro nkụchi mmiri
Mmiri dị n'ime gas eke na-ebutekarị nnukwu nsogbu: n'ọnọdụ ụfọdụ, mmiri na gas eke na-emepụta mmiri mmiri iji gbochie ọkpọkọ mmiri ma metụta usoro mmiri oyi; Na mgbakwunye, ịdị adị nke mmiri ga-akpatakwa oriri ike na-enweghị isi; N'ihi obere okpomọkụ mmiri mmiri nke gas eke na ịdị adị nke mmiri, akụrụngwa ahụ ga-akpọnwụ ma gbochie ya, yabụ a ga-akpọnwụ ya.
Usoro mmịpụta gas sitere n'okike na-agụnyekarị ụdị atọ: mmịpụta okpomọkụ dị ala, mmịpụta mmiri siri ike na mmịpụta mmiri mmiri. A na-ejikarị nkewa oyi eme ihe iji zere mmịpụta mmiri mgbe okpomọkụ gas sitere n'okike dị ala. Agbanyeghị, obere okpomọkụ ọ na-ekwe ka ọ dị oke ma ọ nweghị ike imezu ihe achọrọ maka mmịpụta gas sitere n'okike; mmịpụta mmiri mmiri na-agụnyekarị acid concentrated (na-abụkarị acid organic dị ka phosphoric acid concentrated), glycol (TEG a na-ejikarị eme ihe), wdg, mana usoro ndị a nwere obere omimi mmịpụta mmiri mmiri ma enweghị ike iji ya na nkeji cryogenic; Ụzọ mmịpụta mmiri mmiri nkịtị nke mmịpụta mmiri mmiri siri ike bụ usoro silica gel, usoro mmịpụta mmiri mmiri ma ọ bụ njikọta nke ụzọ abụọ ahụ.
A ga-eji usoro adsorption siri ike mee ihe maka mmiri gas sitere n'okike. Ebe ọ bụ na sieve molekul nwere uru nke nhọrọ adsorption siri ike, njirimara adsorption dị elu n'okpuru obere nrụgide akụkụ nke mmiri na iwepụ gas acid fọdụrụnụ, a na-eji sieve molekul 4A dị ka adsorbent dehydration na atụmatụ a.
C) Nhọrọ nke usoro mwepụ mercury
Ugbu a, e nwere ụzọ abụọ isi wepụ mercury: usoro HgSIV molecular sieve adsorption nke ụlọ ọrụ UOP na United States na sọlfọ a na-etinye carbon arụ ọrụ iji mee ka mercury meghachi omume na sọlfọ iji mepụta mercury sulfide ma tinye ya na carbon arụ ọrụ. Nke mbụ nwere ọnụ ahịa dị elu ma dabara adaba maka oge nwere nnukwu ọdịnaya mercury; nke ikpeazụ nwere obere ọnụ ahịa ọrụ ma dabara adaba maka oge nwere obere ọdịnaya mercury.
N'otu aka, ọnụ ahịa ọrụ nke HgSIV molekul sieve dị oke elu; N'aka nke ọzọ, ọdịnaya mercury dị na gas nri nke unit ahụ dị obere. Ya mere, ụlọ ọrụ ahụ nwere ahụmịhe na-aga nke ọma n'iji carbon e tinyere na sulfur maka iwepụ mercury.
Oge ozi: Jenụwarị-14-2022