67 ~ 134 TPD skid e kentsoeng yuniti ea liquefaction ea khase ea tlhaho

Kakaretso ea sistimi

Phepelo ea khase ea tlhaho e kena tsamaisong ea khase ea tlhaho pele e hloekisa ka mor'a ho sefa, karohano, taolo ea khatello le metering. Ka mor'a hore CO₂, Hg le H₂ O tlosoa, e kena ka liquefaction batang lebokose le reng, e pholileng, liquefied le naetrojene tlosoa ka poleiti fin mocheso exchanger, 'me joale khutlela ho lebokose le batang ho tsoela pele tsidifatso, undercooling, throttling le ho benya ho tanka flash. Karolo e arohaneng ea mokelikeli e kena ka tanka ea polokelo ea LNG e le lihlahisoa tsa LNG.

Mekhoa ea mantlha le mekhoa ea tekheniki ea yuniti ke:

Sebelisa MDEA ho tlosa carbon dioxide;

Sebelisa sefe ea molek'hule ho tlosa metsi a mangata;

Sebelisa khabone e kentsoeng ka sebabole ho tlosa mercury;

Sebelisa lielemente tse nepahetseng ho sefa sefa sa molek'hule le lerole la khabone le kentsoeng

Ts'ebetso ea sehatsetsi sa MRC (motsoako oa sehatsetsing) e amoheloa ho ntša khase eohle ea tlhaho e hloekisitsoeng.

Liquefaction khase ea tlhaho, eo haufinyane e bitsoang LNG, e etsa hore khase ea tlhaho e be mokelikeli ka ho pholisa khase ea tlhaho tlas'a khatello e tloaelehileng ho -162 ℃. Liquefaction ea khase ea tlhaho e ka boloka haholo sebaka sa polokelo le lipalangoang, 'me e na le melemo ea boleng bo phahameng ba lik'halori, ts'ebetso e phahameng, e loketseng ho leka-lekana ha taolo ea mojaro oa litoropo, e loketseng ts'ireletso ea tikoloho, ho fokotsa tšilafalo ea litoropo joalo-joalo.

Sekema sa ts'ebetso se kenyeletsa haholo: taolo ea khatello ea khase ea phepelo le yuniti ea metering,yuniti ea tlhoekiso ea khase ea tlhahole yuniti ea mokelikeli oa khase ea tlhaho, sistimi ea polokelo ea sehatsetsing, sistimi e potolohang ea sehatsetsing, polokelo ea LNG le yuniti ea ho kenya.

Liquefied natural gas (LNG) ke khase ea tlhaho, eo boholo ba eona e leng methane, e pholileng hore e be mokelikeli bakeng sa boiketlo le polokeho ea polokelo le lipalangoang. E nka hoo e ka bang 1/600th bophahamo ba khase ea tlhaho sebakeng sa khase.

Re fana ka Lits'oants'o tsa Khase ea Tlhaho ka li-micro (mini) le tse nyane. Bokhoni ba limela bo akaretsa ho tloha ho 13 ho isa ho lithane tse fetang 200 ka letsatsi la tlhahiso ea LNG (18,000 ho isa ho 300,000 Nm).³/d).

Setsi se felletseng sa LNG se kenyelletsa lits'ebetso tse tharo: sistimi ea ts'ebetso, sistimi ea taolo ea lisebelisoa le sistimi ea ts'ebeliso. Ho ea ka mehloli e fapaneng ea moea, e ka fetoloa.

Ho ea ka boemo ba sebele ba mohloli oa khase, re nka mokhoa o motle ka ho fetisisa le moralo oa moruo ka ho fetisisa ho finyella litlhoko tse fapaneng tsa bareki. Thepa e kentsoeng ka skid e etsa hore lipalangoang le ho kenya li be bonolo haholoanyane.

1. Tsamaiso ea tsamaiso

Phepelo ea khase ea tlhaho e hatelloa ka mor'a ho sefa, karohano, taolo ea khatello le metering, ebe e kena tsamaisong ea pele ea khase ea tlhaho. Ka mor'a ho tlosa CO₂, H₂S, Hg, H₂ O le li-hydrocarbon tse boima, li kena ka lebokoseng le batang la liquefaction. Joale E pholile ka poleiti fin mocheso exchanger, denitrified ka mor'a liquefaction, 'me e latelang subcooled, throttled le ho benya ho tanka ea flash,' me qetellong, karolo e arohaneng ea mokelikeli e kena ka tanka ea polokelo ea LNG e le lihlahisoa tsa LNG.

Chate ea phallo ea Semela sa LNG e kentsoeng ka skid e tjena:

Sistimi ea ts'ebetso ea cryogenic LNG Plant e kenyelletsa:

• ● Feed gase filtration, karohano, khatello ea khatello le metering unit;

• ● Fepa yuniti ea khatello ea khase

• ● Setsi sa ho phekola pele (ho kenyeletsoadeacidization,ho felloa ke metsile ho tlosoa ha hydrocarbon e boima, mercury le ho tlosa lerōle);

• ● MR proportioning unit le MR compression cycle cycle;

• ● LNG liquefaction unit (ho kenyeletsoa le denitrification unit);

1.1 Likarolo tsa sistimi ea ts'ebetso

1.1.1 Setsi sa phepelo ea khase ea phepelo

Mokhoa oa ts'ebetso oa yuniti ea phepelo ea khase ea phepelo e na le litšobotsi tse latelang:

• ●Deacidization ka tharollo ea MDEAe na le melemo ea ho phophoma ha lekoeba le lenyenyane, ho bola ho fokolang le tahlehelo e nyane ea amine.

• ●Mokhabiso oa limolek'hule tsa sieveE sebelisoa bakeng sa dehydration e tebileng, 'me e ntse e na le monyetla o moholo oa ho ba le monyetla oa ho ba le khatello e tlase ea mouoane oa metsi.

• ● Ho sebelisa k'habone e kentsoeng ka sebabole ho tlosa mercury ho theko e tlaase. Mercury e kopana le sebabole holim'a khabone e kentsoeng ea sebabole ho hlahisa mercury sulfide, e hlahisoang ka khabone e kentsoeng ho fihlela sepheo sa ho tlosa mercury.

• ● Lielemente tse nepahetseng tsa sefe li ka sefa sieve ea molek'hule le lerole la khabone le kentsoeng ka tlase ho 5μm.

1.1.2 Setsi sa metsi le sehatsetsi

Mokhoa o khethiloeng oa mokhoa oa liquefaction le sehatsetsing ke MRC (mixed refrigerant) cycle refrigeration, e leng tšebeliso e tlaase ea matla. Mokhoa ona o na le tšebeliso e tlaase ka ho fetisisa ea matla har'a mekhoa e tloaelehileng ea sehatsetsing, e leng se etsang hore theko ea sehlahisoa e be le tlhōlisano 'marakeng. The refrigerant proportioning unit e batla e ikemetse ho potoloha compression unit. Nakong ea ts'ebetso, karolo e lekanang e tlatsa sehatsetsing ho ea ho potoloha mochine oa khatello, ho boloka boemo bo tsitsitseng ba ts'ebetso ea mochine oa ho potoloha; Ka mor'a hore yuniti e koaloe, karolo e lekanang e ka boloka sehatsetsing ho tloha karolong e phahameng ea khatello ea mochine oa khatello ntle le ho ntša sehatsetsing. Sena se ka se boloke sehatsetsi feela, empa hape se khutsufatsa nako e latelang ea ho qala.

Li-valve tsohle tse ka lebokoseng le batang li cheselitsoe, 'me ha ho na khokahano ea flange ka lebokoseng le batang ho fokotsa lintlha tse ka bang teng tsa ho lutla ka lebokoseng le batang.

1.2 Thepa ea mantlha ea Yuniti ka 'ngoe

2. Mokhoa oa ho laola lisebelisoa

Bakeng sa ho lekola ts'ebetso ea tlhahiso ea lisebelisoa tse felletseng, le ho netefatsa ts'ebetso e tšepahalang le ts'ebetso e bonolo le tlhokomelo, sistimi ea taolo ea lisebelisoa e kenyelletsa haholo:

Distributed control system (DCS)

Sistimi ea lisebelisoa tsa polokeho (SIS)

Sistimi ea Alamo ea Mollo le Sebui sa Khase (FGS)

Thelebishene ea potoloho e koetsoeng (CCTV)

Sistimi ea tlhahlobo

Le lisebelisoa tse phahameng tse nepahetseng (flowmeter, analyzer, thermometer, gage ea khatello) e finyellang litlhoko tsa ts'ebetso. Sistimi ena e fana ka tlhophiso e phethahetseng, ts'ebetso le ts'ebetso ea ho beha leihlo, ho kenyelletsa ho fumana data ea ts'ebetso, taolo e koetsoeng, boemo ba ho lekola ts'ebetso ea lisebelisoa, ho koaloa ha alamo le ts'ebeletso, ts'ebetso ea data ea nako ea nnete le ponts'o, ts'ebeletso ea sejoale-joale, ponts'o ea litšoantšo, ts'ebeletso ea tlaleho ea ts'ebetso, mesebetsi e meng. Ha ho e-na le ts'ohanyetso setsing sa tlhahiso kapa tsamaiso ea FGS e romela letšoao la alamo, SIS e romela letšoao la tšireletso ho sireletsa lisebelisoa tsa sebaka sa marang-rang, 'me tsamaiso ea FGS e tsebisa lefapha la mollo oa lehae ka nako e le' ngoe.

3. Sistimi ea lisebelisoa

Sistimi ena haholo-holo e kenyelletsa: yuniti ea moea ea sesebelisoa, yuniti ea naetrojene, yuniti ea oli ea phetisetso ea mocheso, yuniti ea metsi a desalted le yuniti ea metsi a potolohang a pholileng.