Liquefied Natural gas (LNG) iskar gas ne, galibi methane, wanda aka sanyaya shi zuwa nau'in ruwa don sauƙi da amincin ajiya da sufuri. Yana ɗaukar kusan 1/600th ƙarar iskar gas a cikin yanayin gaseous.
Muna samar da Tsirrai na Ruwan Gas a cikin ƙaramin (mini) da ƙaramin sikelin. Ƙarfin tsire-tsire ya rufe daga 13 zuwa fiye da 200 Ton / rana na samar da LNG (20,000 zuwa 300,000 Nm).3/d).
Feed gas:
- ● Filayen iskar gas
- ● Haɗaɗɗen iskar gas
- ● Gas
- ● iskar gas
Cikakken injin liquefaction na LNG ya haɗa da tsarin uku: tsarin tsari, tsarin sarrafa kayan aiki da tsarin amfani. Dangane da hanyoyin iska daban-daban, ana iya canza shi.
Bisa ga ainihin halin da ake ciki na tushen gas, muɗauki mafi kyawun tsari da tsarin tattalin arziki don saduwa da buƙatun abokan ciniki daban-daban.Kayan aikin skid da aka ɗora yana sa sufuri da shigarwa ya fi dacewa.
1. Tsarin tsari
Ana matsar da iskar gas ɗin abinci bayan tacewa, rabuwa, ƙa'idodin matsa lamba da ƙididdigewa, sa'an nan kuma shiga tsarin pretreatment na iskar gas. Bayan cire CO2, H2S, Hg, H2 O da manyan hydrocarbons, yana shiga cikin akwati mai sanyi. Sa'an nan kuma a sanyaya a cikin farantin fin zafi Exchanger, denitrified bayan liquefaction, na gaba subcooled, throttled da flashed zuwa flash tank, da kuma na karshe, da rabuwa ruwa lokaci shiga cikin LNG tank tank matsayin LNG kayayyakin.
Taswirar kwararar skid mai hawa LNG Plant kamar haka:
Tsarin tsari na Cryogenic Plant LNG ya haɗa da:
- ● Feed gas tacewa, rabuwa, matsa lamba ka'idar da metering naúrar;
- ● Ciyar da matsi na iskar gas
- ● Naúrar riga-kafi (ciki har da deacidification, dehydration da nauyi cire hydrocarbon, mercury da kura);
- ● MR proportioning unit da MR compression cycle unit;
- ● LNG naúrar liquefaction (ciki har da sashin denitrification);
1.1 Fasalolin tsarin tsari
1.1.1 Ciyar da iskar gas pretreatment
Hanyar hanyar ciyar da iskar iskar gas tana da halaye masu zuwa:
- ● Deacidification tare da maganin MDEA yana da cancantar ƙananan kumfa, ƙananan lalata da ƙananan amine.
- Ana amfani da adsorption sieve na ƙwayoyin cuta don zurfafawar bushewa, kuma har yanzu yana da fa'ida mai yawa ko da a ƙarƙashin ƙarancin ƙarancin ruwa.
- ● Yin amfani da sulfur-impregnated carbon kunnawa don cire mercury yana da arha a farashi. Mercury yana amsawa tare da sulfur akan sulfur mai kunna carbon da aka kunna don samar da mercury sulfide, wanda aka tallata akan carbon da aka kunna don cimma manufar kawar da mercury.
- ● Madaidaicin abubuwan tacewa na iya tace gwangwadon kwayoyin halitta da kunna ƙurar carbon da ke ƙasa da 5μm.
1.1.2 Liquefaction da refrigeration naúrar
Hanyar da aka zaɓa na shayarwa da naúrar refrigeration shine MRC (mixed refrigerant) refrigeration sake zagayowar, wanda shine ƙarancin kuzari. Wannan hanya tana da mafi ƙarancin amfani da makamashi a cikin hanyoyin da ake amfani da su na firji, wanda ke sa farashin samfur ya zama gasa a kasuwa. Naúrar daidaita firij ɗin tana da ɗan ƙwaƙƙwaran mai zaman kanta daga naúrar matsawa mai yawo. A lokacin aiki, naúrar daidaitawa tana sake cika refrigerant zuwa naúrar matsawa, yana riƙe da ingantaccen yanayin aiki na sashin matsawa mai kewayawa; Bayan an rufe naúrar, naúrar da ake daidaitawa zata iya adana firijin daga ɓangaren matsa lamba na naúrar matsawa ba tare da fitar da na'urar ba. Wannan ba zai iya ajiye firji kawai ba, har ma yana rage lokacin farawa na gaba.
Duk bawuloli a cikin akwatin sanyi suna waldasu, kuma babu haɗin flange a cikin akwatin sanyi don rage yuwuwar ɗigogi a cikin akwatin sanyi.
1.2 Babban kayan aiki na kowane Raka'a
| S/N | Sunan naúrar | Manyan kayan aiki | |
| 1 | Feed gas tacewa rabuwa da regulating naúrar | Feed gas tace separator, flowmeter, matsa lamba regulator, feed gas compressor | |
| 2 | Sashin magani | Naúrar ragewa | Absorber da regenerator |
| Naúrar rashin ruwa | Hasumiya ta adsorption, hita mai sabuntawa, mai sanyaya iskar gas da mai raba iskar gas | ||
| Naúrar kawar da ruwa mai nauyi | Hasumiyar Adsorption | ||
| Kauwar Mercury da sashin tacewa | Mai cire Mercury da tace kura | ||
| 3 | Naúrar ruwan sha | Akwatin sanyi, farantin zafi mai zafi, mai raba, hasumiya ta denitrification | |
| 4 | Na'urar firiji mai gauraye | Refrigerant kewayawa kwampreso da refrigerant daidaita tanki | |
| 5 | LNG naúrar lodi | Tsarin lodawa | |
| 6 | Naúrar dawo da Bog | Bog regenerator | |
2. Tsarin sarrafa kayan aiki
Don sa ido sosai kan tsarin samar da cikakken tsarin kayan aiki, da kuma tabbatar da ingantaccen aiki da aiki mai dacewa da kiyayewa, tsarin sarrafa kayan aikin ya ƙunshi:
Tsarin sarrafawa Rarraba (DCS)
Tsarin Kayan Aiki (SIS)
Ƙararrawar Wuta da Tsarin Gano Gas (FGS)
Gidan Talabijin na Rufe (CCTV)
Tsarin nazari
Kuma kayan aiki masu inganci (flowmeter, analyzer, thermometer, matsa lamba gage) waɗanda suka dace da buƙatun tsari. Wannan tsarin yana ba da cikakkiyar tsari, ƙaddamarwa da ayyuka na saka idanu, gami da sayan bayanan tsari, rufaffiyar madauki, matsayi na saka idanu na kayan aiki, haɗawar ƙararrawa da sabis, sarrafa bayanai na ainihin lokaci da nuni, sabis na haɓakawa, nunin hoto, sabis ɗin rahoton rikodin aiki da sauran ayyuka. Lokacin da akwai gaggawa a cikin sashin samarwa ko tsarin FGS ya aika da siginar ƙararrawa, SIS ta aika da siginar kulle-kullen kariya don kare kayan aikin da ke wurin, kuma tsarin FGS yana sanar da ma'aikatan kashe gobara na gida a lokaci guda.
3. Tsarin amfani
Wannan tsarin ya ƙunshi: naúrar iska na kayan aiki, naúrar nitrogen, rukunin mai na canja wurin zafi, rukunin ruwa da aka ƙera da sashin ruwa mai sanyaya.
