Ikhwalithi Ephezulu YaseChina Abahlinzeki Bezimboni Zegesi Ye-LNG Encane - Inqubo yokukhiqiza ye-LNG encane efakwe i-LNG plant - Rongteng

I-Liquefied natural gas (LNG) igesi yemvelo, ikakhulukazi i-methane, epholiswe yaba uketshezi ukuze kube lula nokuphepha kwendawo yokugcina nokuhamba. Kuthatha cishe i-1/600th umthamo wegesi yemvelo esimweni segesi.

Sihlinzeka Ngezimboni Zokuxutshwa Kwegesi Yemvelo ngesilinganiso esincane (esincane) nangesilinganiso esincane. Umthamo wezitshalo uhlanganisa ukusuka ku-13 kuye kwangaphezu kwamathani angama-200 / usuku lokukhiqizwa kwe-LNG (18,000 kuya ku-300,000 Nm³/d).

Igesi yokuphakelayo:

• ● Izizinda zegesi ezimile
• ● Igesi ehlobene / evuthayo
• ● I-Biogas
• ● Igesi yamapayipi

Isitshalo esiphelele soketshezi lwe-LNG sihlanganisa amasistimu amathathu: uhlelo lwenqubo, uhlelo lokulawula izinsimbi kanye nesistimu yokusetshenziswa. Ngokusho kwemithombo yomoya ehlukene, ingashintshwa.

Ngokwesimo sangempela somthombo wegesi, samukela inqubo engcono kakhulu kanye nohlelo olunomnotho kakhulu ukuhlangabezana nezidingo ezahlukene zamakhasimende. Imishini efakwe kwi-skid yenza ukuthutha nokufaka kube lula.

1. Uhlelo lokucubungula kanye nenqubo yokukhiqiza ye-LNG

Igesi yemvelo ephakelayo icindezelwa ngemva kokuhlunga, ukuhlukaniswa, ukulawulwa kwengcindezi kanye nemitha, bese ingena ohlelweni lokwelapha igesi yemvelo. Ngemuva kokukhipha i-CO₂, H₂S, Hg, H₂O kanye nama-hydrocarbons asindayo, ingena ebhokisini elibandayo le-liquefaction. Bese Ipholiswa ku-plate fin heat exchanger, ikhishwe ngemuva kokukhishwa kwe-liquefaction, bese ipholile kancane, iphihlizwe futhi ikhanyise ku-flash tank, futhi ekugcineni, isigaba soketshezi esihlukanisiwe singena ethangini lokugcina le-LNG njengemikhiqizo ye-LNG.

I-flowchart ye-skid ifakiweI-LNG Plantinjengokulandelayo:

Uhlelo lwenqubo ye-cryogenicI-LNG Plantkuhlanganisa:

• ● Ukuhlunga kwegesi yesiphakeli, ukuhlukanisa, ukulawulwa kwengcindezi kanye neyunithi yokulinganisa;
• ● Iyunithi yokucindezela igesi yokuphakelayo
• ● Iyunithi yokwelapha ngaphambi kwesikhathi (okuhlanganisa ukukhishwa kweacid, ukuphelelwa amanzi emzimbeni kanye nokususwa kwe-hydrocarbon esindayo, ukususwa kwe-mercury nothuli);
• ● Iyunithi yokulinganisa ye-MR kanye neyunithi yomjikelezo wokucindezela we-MR;
• ● Iyunithi yokuncibilika kwe-LNG (kuhlanganise neyunithi yokukhishwa kwe-denitrification);

1.1 Izici zesistimu yenqubo yokukhiqiza ye-LNG

1.1.1 Iyunithi yegesi yokuphakelayo

Indlela yenqubo yeyunithi ye-feed gas pretreatment inezici ezilandelayo:

• ● Ukukhishwa kwe-asidi ngesisombululo se-MDEA kunokufaneleka kokukhihliza amagwebu okuncane, ukugqwala okuphansi nokulahlekelwa okuncane kwe-amine.
• ● I-adsorption ye-molecular sieve isetshenziselwa ukuphelelwa amanzi emzimbeni okujulile, futhi isenayo inzuzo ephezulu yokukhanga ngisho nangaphansi kokucindezela okuyingxenye komhwamuko ophansi.
• ● Ukusebenzisa ikhabhoni efakwe isulfure efakwe isibabule ukususa i-mercury ishibhile ngentengo. I-Mercury ihlangana nesulfure kukhabhoni ecushwe isibabule efakiwe ukuze ikhiqize i-mercury sulfide, ekhangiswa kukhabhoni ecushiwe ukuze kufezwe injongo yokususwa kwe-mercury.
• ● Izinto zokuhlunga ezinembayo zingasefa isisefo semolekyuli kanye nothuli lwekhabhoni olwenziwe lwasebenza ngaphansi kuka-5μm.

1.1.2 Iyunithi yokuncibilika kanye nesiqandisi

Indlela yenqubo ekhethiwe yeyunithi ye-liquefaction kanye nesiqandisi i-MRC (i-mixed refrigerant) yesiqandisi somjikelezo, okusetshenziswa kancane kwamandla. Le ndlela inokusetshenziswa kwamandla okuphansi kakhulu phakathi kwezindlela zesiqandisi ezisetshenziswa kakhulu, okwenza intengo yomkhiqizo ibe nokuncintisana emakethe. Iyunithi yokulinganisa yesiqandisi izimele ngokuqhathaniswa neyunithi yokucindezela ejikelezayo. Ngesikhathi sokusebenza, i-proportioning unit igcwalisa isiqandisisi ku-circulating compression unit, igcina isimo sokusebenza esizinzile seyunithi yokucindezela ejikelezayo; Ngemuva kokuthi iyunithi ivaliwe, iyunithi yokulinganisa ingagcina isiqandisi kusukela engxenyeni ephezulu yokucindezela kweyunithi yokucindezela ngaphandle kokukhipha isiqandisi. Lokhu akukwazi nje ukusindisa isiqandisi, kodwa futhi kunciphise isikhathi sokuqalisa esilandelayo.

Wonke ama-valve asebhokisini elibandayo ashiselwe, futhi akukho ukuxhumana kwe-flange ebhokisini elibandayo ukuze kuncishiswe amaphuzu okuvuza okungenzeka ebhokisini elibandayo.

1.2 Impahla esemqoka yoPhiko ngalunye

2. Uhlelo lokulawula izinsimbi

Ukuze kuqashwe ngempumelelo inqubo yokukhiqiza yesethi ephelele yemishini, kanye nokuqinisekisa ukusebenza okuthembekile nokusebenza okulula nokugcinwa, uhlelo lokulawula izinsimbi lubandakanya ikakhulukazi:

Isistimu yokulawula esabalalisiwe (DCS)

I-safety Instrument system (SIS)

I-alamu yomlilo kanye nohlelo lomtshina wegesi (FGS)

Umabonakude wesekethe evaliwe (CCTV)

Uhlelo lokuhlaziya

Futhi amathuluzi anembe kakhulu (i-flowmeter, i-analyzer, i-thermometer, i-pressure gage) ehlangabezana nezidingo zenqubo. Lolu hlelo luhlinzeka ngokucushwa okuphelele, ukugunyazwa kanye nemisebenzi yokuqapha, okuhlanganisa ukutholwa kwedatha yenqubo, ukulawulwa kwe-loop evaliwe, isimo sokuqapha ukusebenza kwemishini, ukuvala i-alamu kanye nesevisi, ukucubungula idatha yesikhathi sangempela kanye nesibonisi, isevisi yethrendi, isibonisi sezithombe, isevisi yombiko werekhodi lokusebenza neminye imisebenzi. Uma kunesimo esiphuthumayo kuyunithi yokukhiqiza noma isistimu ye-FGS ithumela isignali ye-alamu, i-SIS ithumela isignali ye-interlock yokuvikela ukuze ivikele izinto ezisebenza endaweni, futhi uhlelo lwe-FGS lwazisa umnyango wendawo wesicishamlilo ngesikhathi esifanayo.

3. Uhlelo olusetshenziswayo

Lolu hlelo luhlanganisa ikakhulukazi: iyunithi yomoya wensimbi, iyunithi ye-nitrogen, iyunithi kawoyela yokudlulisa ukushisa, iyunithi lamanzi ane-desalted kanye neyunithi yokupholisa yamanzi ajikelezayo.