Makonda 50 × 10⁴m³/ D gasi liquefaction chomera

Mawu Oyamba

Ntchito yomanga 50 × 10⁴m³ / D pulojekiti yowonongeka kwa gasi ndi malo othandizira ndi thanki imodzi ya 10000 m3 LNG. Njira zazikuluzikulu zogwirira ntchito zimaphatikizapo kuponderezedwa kwa gasi, decarbonization unit, dehydration unit, mercury ndi heavy hydrocarbon remover unit, liquefaction unit, refrigerant storage, flash steam pressurization, LNG tank famu ndi malo osungiramo katundu.

Kodi mankhwala a gasi asanayambe kumwa madzi amadzimadzi amagwira ntchito bwanji?

Chitsime cha chakudya cha zomera chimabwera mu mawonekedwe a mpweya ndi chitoliro. Gasi wachilengedwe wotengedwa pansi amakhala ndi zonyansa, madzi ndi madzi ena ogwirizana, kotero kuti liquefaction isanayambe, mpweya uyenera kudutsa njira yochizira kuchotsa zinthu zosafunikira. Mpweyawu umadutsa muzotengera zingapo, ma compressor ndi mapaipi pomwe mpweya umasiyanitsidwa ndi madzi olemera ndi zonyansa.

Choyamba, madzi ndi condensate amachotsedwa, kenakokuchotsa asidi asidi (carbon dioxide, CO2), hydrogen sulfide (H2S) ndi mercury (Hg). Zinthuzi ndizosafunika, chifukwa zimatha kuyambitsa madzi oundana panthawi ya liquefaction ndi dzimbiri m'mapaipi ndi zosinthira kutentha kwa LNG. Kusakaniza kotsalako kumasungunuka kale, ndipo zina, zolemera kwambiri, zamadzimadzi za gasi zachilengedwe zimasiyanitsidwa ndi kusakaniza kusanachitike. Ma hydrocarbon ochotsedwa amatha kusungidwa ndikugulitsidwa padera. Mpweya wotsalawo nthawi zambiri umakhala ndi methane ndi ethane, yomwe imalowetsedwa.

Mpweya wachilengedwe wa Liquefaction, womwe posachedwapa umatchedwa LNG, ukusandutsa gasi wachilengedwe kukhala wamadzimadzi poziziritsa mpweya wachilengedwe womwe umakhala ndi mpweya wabwino kwambiri mpaka - 162 ℃. Kuphatikizika kwa gasi wachilengedwe kumatha kupulumutsa kwambiri malo osungira ndi oyendetsa, ndipo kumakhala ndi ubwino wamtengo wapatali wa calorific, ntchito yapamwamba, yogwirizana ndi kayendetsedwe ka katundu wa m'tawuni, kuthandizira kuteteza chilengedwe, kuchepetsa kuipitsidwa kwa mizinda ndi zina zotero.

Ndondomekoyi imaphatikizapo: kayendedwe ka mpweya wa gasi ndi metering unit,gawo loyeretsa gasindi gasi zachilengedwe liquefaction unit, refrigerant storage system, refrigerant circulating compression system, LNG storage and loading unit.

Liquefied Natural Gas (LNG) ndi gasi wachilengedwe, makamaka methane, womwe udakhazikika kuti ukhale wamadzimadzi kuti ukhale wosavuta komanso wotetezeka pakusungirako ndi kuyendetsa. Zimatenga pafupifupi 1/600th kuchuluka kwa gasi wachilengedwe mugawo la mpweya.

Timapereka Zomera Zothirira Gasi Wachilengedwe pang'onopang'ono (mini) komanso pang'ono. Kuchuluka kwa zomera kumachokera ku 13 mpaka kupitirira 200 Matani / tsiku la kupanga LNG (18,000 mpaka 300,000 Nm).³/d).

Chomera chathunthu cha LNG liquefaction chimaphatikizapo machitidwe atatu: njira yoyendetsera, makina owongolera zida ndi makina ogwiritsira ntchito. Malingana ndi magwero osiyanasiyana a mpweya, zikhoza kusinthidwa.

Malinga ndi momwe zinthu zilili pagwero la gasi, timatengera njira yabwino kwambiri komanso njira yochepetsera ndalama kuti tikwaniritse zosowa zosiyanasiyana za makasitomala. Zida zoyika pa skid zimapangitsa mayendedwe ndi kukhazikitsa kukhala kosavuta.

1. Ndondomeko ya ndondomeko

Mpweya wachilengedwe umakanikizidwa pambuyo pa kusefera, kupatukana, kuwongolera kuthamanga ndi metering, kenako ndikulowa munjira yopangira gasi. Pambuyo pochotsa CO₂, H₂S, Hg, H₂ O ndi heavy hydrocarbons, amalowa mu liquefaction ozizira bokosi. Ndiye Iwo utakhazikika mu mbale zipsepse kutentha exchanger, denitrified pambuyo liquefaction, ndi lotsatira subcooled, throttled ndi kung'anima kwa kung'anima thanki, ndipo otsiriza, olekanitsidwa madzi gawo akulowa LNG yosungirako thanki monga LNG mankhwala.

Mayendedwe a skid wokwera LNG Plant ali motere:

Dongosolo la cryogenic LNG Plant limaphatikizapo:

• ● Kudyetsa gasi kusefera, kupatukana, kuwongolera kukakamiza ndi gawo la metering;

• ● Feed gasi pressurization unit

• ● Chigawo chokonzekera (kuphatikizadeacidification,kuchepa madzi m'thupindi kuchotsa heavy hydrocarbon, mercury ndi fumbi kuchotsa;

• ● MR proportioning unit ndi MR compression cycle unit;

• ● LNG liquefaction unit (kuphatikizapo denitrification unit);

1.1 Mawonekedwe a process system

1.1.1 Gawo lamafuta opangira mafuta

Njira yopangira gasi pretreatment unit ili ndi izi:

• ●Deacidization ndi yankho la MDEAali ndi ubwino wa kuchita thovu pang'ono, kuwononga pang'ono ndi kutaya pang'ono kwa amine.

• ●Maselo a sieve adsorptionamagwiritsidwa ntchito pochepetsa kuchepa kwa madzi m'thupi, ndipo amakhalabe ndi mwayi wokomera ngakhale pansi pa mpweya wochepa wa madzi.

• ● Kugwiritsa ntchito kaboni wa sulfure wopangidwa ndi sulfure kuchotsa mercury ndikotsika mtengo. Mercury imakhudzidwa ndi sulfure pa sulfure wolowetsedwa wopangidwa ndi mpweya kuti apange mercury sulfide, yomwe imatulutsidwa pa carbon activated kuti ikwaniritse cholinga chochotsa Mercury.

• ● Zinthu zosefera zolondola zimatha kusefa sieve ya mamolekyulu ndi fumbi loyatsidwa ndi kaboni pansi pa 5μm.

1.1.2 Chigawo cha Liquefaction ndi firiji

Njira yosankhidwa ya liquefaction ndi refrigeration unit ndi MRC (mixed refrigerant) refrigeration cycle refrigeration, yomwe imakhala yochepa mphamvu. Njirayi imakhala ndi mphamvu yochepa kwambiri yogwiritsira ntchito mphamvu pakati pa njira zomwe zimagwiritsidwa ntchito kwambiri mufiriji, zomwe zimapangitsa kuti mtengo wa malonda ukhale wopikisana pamsika. Gawo la refrigerant proportioning unit limakhala lodziyimira pawokha pagawo lozungulira. Panthawi yogwira ntchito, gawo lofananira limabwezeretsanso refrigerant ku gawo loponderezana lozungulira, kusunga magwiridwe antchito okhazikika agawo lozungulira; Chigawocho chikatsekedwa, gawo lolinganiza likhoza kusunga firiji kuchokera ku gawo loponderezedwa kwambiri la unit compression unit popanda kutulutsa firiji. Izi sizingangopulumutsa refrigerant, komanso kufupikitsa nthawi yotsatira yoyambira.

Mavavu onse mu bokosi lozizira amawotchedwa, ndipo palibe kugwirizana kwa flange mu bokosi lozizira kuti muchepetse kutayikira komwe kungatheke mubokosi lozizira.

1.2 Zida zazikulu za Unit iliyonse

2. Dongosolo lowongolera zida

Pofuna kuwunika bwino ntchito yopanga zida zonse, ndikuwonetsetsa kuti magwiridwe antchito odalirika komanso osavuta kugwiritsa ntchito ndi kukonza, zida zowongolera zida zimaphatikizapo:

Distributed control system (DCS)

Safety Instrument System (SIS)

Alamu yamoto ndi makina ojambulira gasi (FGS)

TV yotsekedwa (CCTV)

Analysis system

Ndipo zida zolondola kwambiri (flowmeter, analyzer, thermometer, gage pressure) zomwe zimakwaniritsa zofunikira. Dongosololi limapereka kasinthidwe koyenera, kuyitanitsa ndi kuyang'anira ntchito, kuphatikiza kupeza njira, kuwongolera kotseka, kuyang'anira zida zogwirira ntchito, kutsekereza ma alarm ndi ntchito, kukonza ndikuwonetsa zenizeni zenizeni, ntchito zamachitidwe, kuwonetsa zithunzi, ntchito ya lipoti lantchito ndi ntchito zina. Pakakhala zadzidzidzi mu gawo lopangira kapena FGS imatumiza chizindikiro cha alamu, SIS imatumiza chizindikiro chotchinga chitetezo kuti chiteteze zida zapamalo, ndipo FGS imadziwitsa dipatimenti yozimitsa moto nthawi yomweyo.

3. Dongosolo lothandizira

Dongosololi limaphatikizapo: chida cha mpweya, gawo la nayitrogeni, gawo lamafuta otengera kutentha, gawo lamadzi la desalted ndi kuziziritsa kozungulira madzi.