Ụlọ ọrụ ihe ọkụkụ dị elu nke China LNG - 0.7 ~ 3.5 MMSCFD ahaziri obere usoro osisi LNG ma ọ bụ osisi liquefaction LNG - Rongteng

Ntụle na nhọrọ nke teknụzụ usoro

Usoro nke ikuku gas na-agụnye pretreatment (ọcha) nke raw gas, liquefaction (ma ọ bụ LNG liquefaction osisi), refrigerant mgbasa mkpakọ, ngwaahịa nchekwa, loading na inyeaka usoro, wdg isi usoro na-agụnye ọcha nke raw gas na liquefaction nke dị ọcha gas.

Nhọrọ nke usoro nchacha gas

Dị ka raw gas, eke gas ga-nke ọma ọcha tupu liquefaction. Nke ahụ bụ iji wepụ acid gas, mmiri na adịghị ọcha na nri gas, dị ka H2S, CO2, H2O, Hg na aromatic hydrocarbons, ka zere igbochi na corrosion nke ngwá na pipelines n'ihi kefriza na ala okpomọkụ.Table 5.1-1 depụtara na pretreat gas na ọdịnaya nke kasị elu nke gas.

Ọdịnaya adịghị ọcha kacha mma nke gas nri LNG

Dị ka data nke nri gas si dị, ihe dị n'ime mmiri dị na gas nri karịrị ụkpụrụ na a ghaghị ime ka ọ dị ọcha.

A) Nhọrọ nke usoro nkwụsị

H2S na CO2 dị na gas sitere n'okike ka a na-akpọkọta ọnụ dị ka gas acid. Ịdị adị ha ga-eme ka ọkpụkpụ ígwè na-emetọ gburugburu ebe obibi. Tụkwasị na nke ahụ, ọ bụrụ na ọdịnaya CO2 dị oke elu, a ga-ebelata uru calorific nke gas sitere n'okike. Ya mere, a ghaghị ịchịkwa ọdịnaya nke ihe ndị dị na acid na gas gas na-achịkwa iji mezuo ihe achọrọ nke usoro na àgwà ngwaahịa.

E nwere ihe mgbaze absorption usoro, anụ ahụ absorption usoro, ọxịdashọn-mbelata usoro na molekụla sieve adsorption usoro maka iwepu acid gas si eke gas.Ut now, ihe mgbaze absorption usoro bụ ọtụtụ ebe ghọtara na ọtụtụ ebe na-eji.It bụ a desulfurization usoro dabeere reversible chemical mmeghachi omume na iji alkaline mgbaze dị ka absorbent. Ihe mgbaze na-emeghachi omume na akụkụ acid (karịsịa CO2) na gas nri iji mepụta ogige. Ọgaranya mmiri mmiri na-amịkọrọ acid gas nwere ike decompose na hapụ acid gas n'okpuru ọnọdụ nke na-amụba okpomọkụ na mbenata nrụgide, nke mere na-aghọta mmụghachi na itinye n'ọrụ nke ihe mgbaze.

N'ihe gbasara oriri ike, ọnụ ọgụgụ ọgwụgwọ, ntinye ego na ụgwọ ọrụ, usoro mmiri mmiri MDEA amine bụ usoro kachasị mma, ya mere a na-ahọrọ usoro mmiri mmiri MDEA amine maka deacidification na atụmatụ a.

B) Nhọrọ nke usoro akpịrị ịkpọ nkụ

Usoro akpịrị ịkpọ nkụ nke ikuku gas na-agụnyekarị akpịrị ịkpọ nkụ dị ala, mgbasa ozi desiccant siri ike na nnabata ihe mgbaze. Kefriza nkewa na-tumadi iji zere hydrate nke eke gas mgbe okpomọkụ dị ala, ma ya allowable ala okpomọkụ dị oke, nke na-apụghị izute chọrọ eke gas liquefaction; absorption ihe mgbaze na-agụnyekarị acid concentrated (n'ozuzu lekwasịrị phosphoric acid na ndị ọzọ organic acids), glycol (a na-ejikarị triethylene glycol), wdg, ma ndị a ụzọ nwere ala dehydration omimi, nke na-enweghị ike iji na cryogenic unit; Ụzọ nkụda mmụọ siri ike bụ usoro silica gel, usoro sieve molecular ma ọ bụ ngwakọta nke ụzọ abụọ ahụ.

Mmiri mmiri na-ekpo ọkụ na ikuku gas ga-enwerịrị usoro mgbasa ozi siri ike. N'ihi na molecular sieve nwere ike adsorption selectivity, elu adsorption e ji mara n'okpuru ala mmiri vapor akụkụ nrụgide, na ike n'ihu wepụ ihe fọdụrụ acid gas n'otu oge, 4A molecular sieve na-eji dị ka akpịrị ịkpọ nkụ adsorbent na atụmatụ a.

C) Nhọrọ nke usoro iwepụ mercury

Ka ọ dị ugbu a, enwere usoro mwepụ nke mercury abụọ: HGSIV molecular sieve adsorption usoro nke ụlọ ọrụ UOP dị na United States na mmeghachi omume kemịkalụ n'etiti mercury na sọlfọ site na iji sọlfọ impregnated carbon activated iji mepụta mercury sulfide, nke na-adsorbed na carbon arụ ọrụ. Nke mbụ bụ ọnụ ahịa dị elu ma dabara maka oge ahụ nwere ọdịnaya mercury dị elu; nke ikpeazụ bụ ọnụ ala dị ala ma dabara maka mmemme ahụ nwere ọdịnaya mercury dị ala.

N'otu aka ahụ, ụgwọ ọrụ nke HGSIV molecular sieve dị oke elu; n'aka nke ọzọ, mercury ọdịnaya na nri gas nke unit a dịtụ ala. Ya mere, iji sọlfọ impregnated arụ ọrụ carbon mercury usoro, ụlọ ọrụ nwere ihe ịga nke ọma ahụmahụ.