Musamman 50×10⁴m³/ D na'ura mai sarrafa iskar gas

Gabatarwa

Gina aikin 50 × 10⁴m³ / D aikin samar da iskar gas da kayan tallafi da tanki mai cikakken 10000 m3 LNG. Babban raka'o'in aiwatarwa sun haɗa da matsi na iskar gas, na'urar kashe kuzari, rukunin bushewa, mercury da naúrar cirewar hydrocarbon mai nauyi, rukunin ruwa, ajiyar firiji, matsi mai walƙiya, filayen tanki na LNG da wuraren lodi.

Yaya pre-liquefaction maganin iskar gas ke aiki?

Ruwan rijiyar ciyarwar shuka yana zuwa cikin sigar gas ta bututu. Iskar iskar gas da ake hakowa daga kasa tana dauke da datti, ruwa da sauran abubuwan da ke hade da su, don haka kafin a samu ruwa, iskar ta bukaci a bi hanyar da za a bi don kawar da abubuwan da ba a so. Gas yana bi ta cikin jerin tasoshin ruwa, damfara da bututu inda aka ware iskar gas a mataki na gaba da ruwa mai nauyi da datti.

Da farko, ana cire ruwa da condensate, sannan a biyo bayakawar da acid gas (carbon dioxide, CO2), hydrogen sulfide (H2S) da mercury (Hg). Wadannan abubuwan ba a so, saboda suna iya haifar da ƙanƙara a yayin da ake yin ruwa da lalata a cikin bututun da masu musayar zafi na LNG. Sauran abin da ya rage an sanyaya shi, sannan a raba sauran, mafi nauyi, ruwan iskar gas daga gaurayawan kafin a yi ruwa. Ana iya adana abubuwan da aka cire na hydrocarbons kuma a sayar da su daban. Ragowar iskar gas galibi ya ƙunshi methane da wasu ethane, wanda ake kawo ruwa.

Liquefaction na iskar gas, wanda ake kira da ɗan gajeren lokaci LNG, yana tattara iskar gas zuwa ruwa ta hanyar sanyaya iskar gas ɗin ƙarƙashin matsi na al'ada zuwa - 162 ℃. Ruwan iskar iskar gas na iya adana sararin ajiya da sufuri, kuma yana da fa'idodi na babban darajar calorific, babban aiki, mai dacewa da daidaiton ka'idojin ɗaukar kaya na birni, mai dacewa da kariyar muhalli, rage gurɓataccen birni da sauransu.

Tsarin tsari ya haɗa da: ciyarwar iskar gas mai daidaitawa da na'ura mai aunawa,naúrar tsarkake iskar gasda na'ura mai ba da iskar gas, tsarin ajiya mai sanyi, tsarin matsawa na refrigerant, ajiyar LNG da na'ura mai kaya.

Liquefied Natural Gas (LNG) iskar gas ne, galibi methane, wanda aka sanyaya shi ya zama sifar 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 Tons / rana na samar da LNG (18,000 zuwa 300,000 Nm).³/d).

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.

Dangane da ainihin halin da ake ciki na tushen iskar gas, muna ɗaukar tsari mafi kyau da kuma tsarin tattalin arziki don saduwa da bukatun 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 ya 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.

Jadawalin kwarara na skid wanda aka ɗora LNG Plant shine kamar haka:

Tsarin tsari na Cryogenic Plant LNG ya haɗa da:

• ● Feed gas tacewa, rabuwa, matsa lamba ka'idar da metering naúrar;

• ● Ciyar da matsewar iskar gas

• ● Sashin magani (ciki har dadeacidification,rashin ruwada kuma kawar da ruwa mai nauyi, mercury da kura;

• ● MR proportioning unit da MR compression cycle unit;

• ● LNG naúrar liquefaction (ciki har da sashin denitrification);

1.1 Features na 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 MDEAyana da fa'ida na ƙananan kumfa, ƙarancin lalacewa da ƙarancin amine.

• ●Molecular sieve adsorptionana amfani da shi don bushewa mai zurfi, kuma har yanzu yana da fa'ida mai yawa ko da a ƙarƙashin ƙarancin ƙarancin tururi na 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 ramin 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 ɓacin rai 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 firij 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

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 haɗa da: naúrar iska na kayan aiki, naúrar nitrogen, rukunin mai na canja wurin zafi, rukunin ruwa da aka ƙera da sashin ruwa mai sanyaya.