0.7~3.5 MMSCFD Njira yopangira makina ang'onoang'ono a LNG kapena malo opangira madzi a 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).

Mpweya wothira chakudya:

• ● Malo osungiramo gasi omwe ali ndi mpweya wochepa

• ● Mpweya wogwirizana / woyaka

• ● Biogas

• ● Gasi wa paipi

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.

4. Kuyerekeza ndi kusankha ukadaulo wa njira

Njira yothira mpweya wachilengedwe imaphatikizapo kuyeretsa mpweya wosaphika, kuyeretsa mpweya (kapena chomera chothira mpweya wa LNG), kupondereza kayendedwe ka mpweya mufiriji, kusungira zinthu, kukweza katundu ndi njira yothandizira, ndi zina zotero. Njira yaikulu imaphatikizapo kuyeretsa mpweya wosaphika ndi kuyeretsa mpweya woyeretsedwa.

Kusankha njira yoyeretsera gasi wachilengedwe

Monga mpweya wosaphika, mpweya wachilengedwe uyenera kuyeretsedwa bwino usanayambe kusungunuka. Izi zikutanthauza kuchotsa mpweya wa asidi, madzi ndi zinthu zosafunika mu mpweya wodyetsa, monga H2S, CO2, H2O, Hg ndi ma hydrocarbons onunkhira, kuti apewe kutsekeka ndi dzimbiri kwa zida ndi mapaipi chifukwa cha kuzizira pa kutentha kochepa. Tebulo lotsatirali likuwonetsa miyezo yokonzekera chithandizo ndi kuchuluka kwa zinthu zosafunika kwambiri mu mpweya wodyetsa mu fakitale ya LNG.

Mpweya woipa kwambiri wa LNG womwe ungathe kuipitsidwa