Makonda 50 × 10⁴m³ / D fakitale yopangira madzi a gasi wachilengedwe

Chiyambi

Kumanga kwa polojekitiyi 50 × 10⁴m³/ D pulojekiti yothira madzi a gasi lachilengedwe ndi malo othandizira ndi thanki imodzi ya LNG yokwana 10000 m3. Magawo akuluakulu ogwirira ntchito ndi monga kukakamiza mpweya wodyetsa, chipangizo chochotsa mpweya m'thupi, chipangizo chochotsera madzi m'thupi, chipangizo chochotsera mercury ndi hydrocarbon yolemera, chipangizo chothira madzi, malo osungiramo zinthu zoziziritsa kukhosi, kukakamiza nthunzi ya flash, famu ya thanki ya LNG ndi malo opatsira katundu.

Kodi njira yochiritsira mpweya wachilengedwe isanayambe kusungunuka imagwira ntchito bwanji?

Mpweya wa zomera umabwera mu mpweya pogwiritsa ntchito chitoliro. Mpweya wachilengedwe wochotsedwa pansi umakhala ndi zinthu zosafunika, madzi ndi zina zokhudzana nazo, kotero mpweyawo usanayambe kusungunuka, uyenera kudutsa mu njira yoyeretsera kuti uchotse zinthu zosafunikira. Mpweyawo umadutsa m'mitsempha, ma compressor ndi mapaipi angapo komwe mpweya umalekanitsidwa pang'onopang'ono ndi zinthu zolemera komanso zosafunika.

Choyamba, madzi ndi condensate zimachotsedwa, kenako kuchotsa mpweya wa asidi (carbon dioxide, CO2), hydrogen sulfide (H2S) ndi mercury (Hg). Zinthuzi sizimafunidwa, chifukwa zingayambitse ayezi panthawi ya liquefaction ndi dzimbiri m'mapaipi ndi LNG heat exchangers. Chosakaniza chotsalacho chimaziziritsidwa kale, ndipo madzi ena achilengedwe, olemera, amalekanitsidwa ndi chosakanizacho asanayambe liquefaction. Ma hydrocarbon ochotsedwa amatha kusungidwa ndikugulitsidwa padera. Mpweya wotsalawo umakhala ndi methane ndi ethane, yomwe imabweretsedwa ku liquefaction.

Mpweya wachilengedwe wothira madzi, womwe umatchedwa LNG posachedwa, umasungunula mpweya wachilengedwe kukhala madzi mwa kuziziritsa mpweya wachilengedwe wothira madzi pansi pa mphamvu yachibadwa kufika pa -162 ℃. Mpweya wachilengedwe wothira madzi umatha kusunga malo osungiramo zinthu ndi mayendedwe, ndipo uli ndi ubwino wa kukhala ndi mphamvu zambiri, kugwira ntchito bwino, kulimbikitsa malamulo a katundu m'mizinda, kulimbikitsa kuteteza chilengedwe, kuchepetsa kuipitsa kwa mizinda ndi zina zotero.

Ndondomeko ya ndondomekoyi ikuphatikizapo: kudyetsa mpweya woyendetsa kuthamanga kwa mpweya ndi chipangizo choyezera,chipangizo choyeretsera mpweya wachilengedwendi chipangizo choyeretsera mpweya wachilengedwe, njira yosungiramo zinthu zoziziritsira, njira yochepetsera mpweya wozizira, chipangizo chosungiramo ndi kukweza katundu cha LNG.

Mpweya wachilengedwe wosungunuka (LNG) ndi mpweya wachilengedwe, makamaka methane, womwe waziziritsidwa kukhala madzi kuti usungidwe mosavuta komanso mosamala. Umatenga pafupifupi 1/600th ya kuchuluka kwa mpweya wachilengedwe mu mpweya.

Timapereka zomera zoyeretsera mpweya wachilengedwe m'mafakitale ang'onoang'ono komanso ang'onoang'ono. Mphamvu ya zomerazi imafikira matani 13 mpaka 200 patsiku a LNG (18,000 mpaka 300,000 Nm).³/d).

Chomera chathunthu chothira madzi a LNG chili ndi machitidwe atatu: makina opangira, makina owongolera zida ndi makina ogwiritsira ntchito. Malinga ndi magwero osiyanasiyana a mpweya, imatha kusinthidwa.

Malinga ndi momwe gasi alili, timagwiritsa ntchito njira yabwino kwambiri komanso njira yotsika mtengo kwambiri kuti tikwaniritse zosowa zosiyanasiyana za makasitomala. Zipangizo zokwezedwa ndi skid zimapangitsa kuti mayendedwe ndi kuyika zikhale zosavuta.

1. Njira yogwirira ntchito

Mpweya wachilengedwe umapanikizika pambuyo posefedwa, kulekanitsidwa, kulamulira kuthamanga ndi kuyeza, kenako umalowa mu dongosolo lokonzekera mpweya wachilengedwe. Mukachotsa CO2, mpweya wachilengedwe umayikidwa mu dongosolo lokonzekera mpweya wachilengedwe.₂, H₂S ,Hg, H₂O ndi ma hydrocarbon olemera, amalowa mu bokosi lozizira la liquefaction. Kenako amaziziritsidwa mu chosinthira kutentha cha mbale, chosinthidwa kukhala nitrogen pambuyo pa liquefaction, kenako chimaziziritsidwa pang'ono, chimapindidwa ndikuyatsidwa ku thanki ya flash, ndipo pomaliza, gawo lolekanitsidwa lamadzimadzi limalowa mu thanki yosungiramo LNG ngati zinthu za LNG.

Chithunzi cha malo oyeretsera a LNG omwe ali ndi skid ndi awa:

Njira yogwiritsira ntchito chomera cha cryogenic LNG ikuphatikizapo:

• ● Kusefa mpweya wa chakudya, kulekanitsa, kulamulira kuthamanga kwa mpweya ndi chipangizo choyezera;

• ● Chipangizo chothandizira mpweya woipa

• ● Chipinda chothandizira odwala (kuphatikizapokuchepetsa asidi,kutaya madzi m'thupindi kuchotsa mafuta olemera a hydrocarbon, mercury ndi fumbi);

• ● Gawo lowerengera MR ndi gawo la kuzungulira kwa MR;

• ● Chipangizo choyeretsera madzi cha LNG (kuphatikizapo chipangizo choyeretsera madzi);

1.1 Makhalidwe a dongosolo la ndondomeko

1.1.1 Chida chokonzera mpweya wothira chakudya

Njira yogwiritsira ntchito chipangizo chokonzekera mpweya wothira mpweya ili ndi makhalidwe awa:

• ●Kuchepetsa acidity pogwiritsa ntchito njira ya MDEAili ndi ubwino wa thovu laling'ono, kuwononga pang'ono komanso kutayika pang'ono kwa amine.

• ●Kulowetsedwa kwa sieve ya molekyuluimagwiritsidwa ntchito pochotsa madzi m'thupi kwambiri, ndipo ikadali ndi ubwino waukulu wothira madzi ngakhale ikapanikizika pang'ono ndi nthunzi ya madzi.

• ● Kugwiritsa ntchito mpweya wopangidwa ndi sulfure pochotsa mercury ndi kotsika mtengo. Mercury imakumana ndi sulfure pa mpweya wopangidwa ndi sulfure kuti ipange mercury sulfide, yomwe imayamwa mpweya wopangidwa kuti ikwaniritse cholinga chochotsa mercury.

• ● Zinthu zosefera bwino zimatha kusefa sieve ya molekyulu ndi fumbi la kaboni loyatsidwa pansi pa 5μm.

1.1.2 Chipinda chothira madzi ndi choziziritsira

Njira yosankhidwa yogwiritsira ntchito liquefaction ndi refrigerant unit ndi MRC (mixed refrigerant) cycle refrigerant, yomwe ndi yotsika mphamvu. Njirayi ili ndi mphamvu zochepa zomwe zimagwiritsidwa ntchito kwambiri pakati pa njira zozizira zomwe zimagwiritsidwa ntchito kwambiri, zomwe zimapangitsa kuti mtengo wazinthu ukhale wopikisana pamsika. Refrigerant proportioning unit imakhala yosiyana ndi circular compression unit. Panthawi yogwira ntchito, recording unit imadzaza refrigerant ku circular compression unit, kusunga malo ogwirira ntchito okhazikika a circular compression unit; Pambuyo poti unit yatsekedwa, recording unit imatha kusunga refrigerant kuchokera ku high-pressure ya unit compression unit popanda kutulutsa refrigerant. Izi sizingopulumutsa refrigerant yokha, komanso zimafupikitsa nthawi yotsatira yoyambira.

Ma valve onse omwe ali mu bokosi lozizira ali ndi welded, ndipo palibe kulumikizana kwa flange mu bokosi lozizira kuti muchepetse malo omwe angatulukire mu bokosi lozizira.

1.2 Zipangizo zazikulu za gawo lililonse

2. Dongosolo lowongolera zida

Pofuna kuyang'anira bwino njira yopangira zida zonse, ndikuwonetsetsa kuti zikugwira ntchito bwino komanso kuti zikhale zosavuta kugwiritsa ntchito komanso kukonza, makina owongolera zida amaphatikizapo:

Dongosolo lolamulira logawidwa (DCS)

Dongosolo la Zida Zachitetezo (SIS)

Dongosolo Lodziwira Moto ndi Gasi (FGS)

Televizioni yotsekedwa (CCTV)

Dongosolo losanthula

Ndi zida zolondola kwambiri (flowmeter, analyzer, thermometer, pressure gage) zomwe zimakwaniritsa zofunikira pa ndondomekoyi. Dongosololi limapereka ntchito zabwino kwambiri zokonzera, kuyambitsa ndi kuyang'anira, kuphatikizapo kupeza deta ya ndondomekoyi, kuwongolera kotsekedwa, kuyang'anira momwe zida zimagwirira ntchito, kutseka ndi kutumikira alamu nthawi yeniyeni, kukonza ndi kuwonetsa deta nthawi yeniyeni, ntchito yoyendera, kuwonetsa zithunzi, ntchito yolemba malipoti a ntchito ndi ntchito zina. Pakakhala vuto lalikulu mu gawo lopanga kapena dongosolo la FGS likatumiza chizindikiro cha alamu, SIS imatumiza chizindikiro cha chitetezo cha interlock kuti chiteteze zida zomwe zili pamalopo, ndipo dongosolo la FGS limadziwitsa dipatimenti yozimitsa moto yapafupi nthawi yomweyo.

3. Dongosolo lamagetsi

Dongosololi limaphatikizapo makamaka: chipangizo choyezera mpweya, chipangizo cha nayitrogeni, chipangizo choyezera mafuta otenthetsera, chipangizo cha madzi osungunuka mchere ndi chipangizo choziziritsira madzi ozungulira.