Umgangatho oPhezulu waseTshayina aBaboneleli beZityalo zeGesi eziNcinane ze-LNG-Inkqubo yokwenziwa kwe-LNG encinci yokutyibilika kwiplanti yeLNG-eRongteng

Irhasi eyiLiquefied natural gas (LNG) yirhasi yendalo, ubukhulu becala iyimethane, ethe yapholiswa yaya kutsho kulwelo ukuze kube lula kunye nokhuseleko lokugcinwa nokuthutha. Kuthatha malunga ne-1/600 umthamo wegesi yendalo kwimeko yegesi.

Sibonelela ngeZityalo zokuNyilwa kweGesi yeNdalo kwi-micro (mini) nakwizinga elincinci. Umthamo wezityalo ugubungela ukusuka kwi-13 ukuya ngaphezulu kwe-200 yeeToni / ngosuku lwemveliso ye-LNG (18,000 ukuya kwi-300,000 Nm³/d).

Igesi yokutya:

• ● Iindawo ezixineneyo zegesi
• ● Irhasi edibeneyo / evuthayo
• ● I-Biogas
• ● Irhasi yombhobho

Isityalo esipheleleyo sokunyibilikisa i-LNG sibandakanya iinkqubo ezintathu: inkqubo yenkqubo, inkqubo yokulawula izixhobo kunye nenkqubo yokusetyenziswa. Ngokwemithombo yomoya eyahlukeneyo, inokutshintshwa.

Ngokwemeko yokwenene yomthombo wegesi, samkela eyona nkqubo ilungileyo kunye neskimu esinoqoqosho kakhulu ukuhlangabezana neemfuno ezahlukeneyo zabathengi. Izixhobo ezifakwe kwi-Skid zenza ukuba uthutho kunye nofakelo lube lula ngakumbi.

1. Inkqubo yenkqubo kunye nenkqubo yokuvelisa i-LNG

Irhasi yendalo yokutya icinezelwa emva kokuhluzwa, ukwahlukana, ukulawulwa koxinzelelo kunye nemitha, kwaye emva koko ingene kwinkqubo yonyango yegesi yendalo. Emva kokususa i-CO₂, H₂S, Hg, H₂O kunye neehydrocarbons ezinzima, ingena kwibhokisi ebandayo ye-liquefaction. Emva koko Ipholile kwi-plate fin heat exchanger, i-denitrified emva kokutshitshiswa, kunye ne-subcooled elandelayo, i-throttled kunye ne-flash tank, kwaye ekugqibeleni, isigaba solwelo esahlukileyo singena kwi-tank yokugcina ye-LNG njengemveliso ye-LNG.

Itshati yokutyibilika ixhonyiweIsityalo se-LNGinjengoku kulandelayo:

Inkqubo yenkqubo ye-cryogenicIsityalo se-LNGiquka:

• ● Ukuhluzwa kwerhasi yokutya, ukwahlula, ukulawulwa koxinzelelo kunye neyunithi yokulinganisa;
• ● Iyunithi yoxinzelelo lwegesi yokutya
• ● Iyunithi yonyango lwangaphambili (kubandakanya ukukhutshwa kweasidi, ukuphelelwa ngamanzi emzimbeni kunye nokususwa kwehydrocarbon enzima, imekyuri nokususwa kothuli);
• ● Iyunithi yokulinganisa i-MR kunye neyunithi yomjikelo woxinzelelo lwe-MR;
• ● Iyunithi yokunyibilikisa kwe-LNG (kubandakanywa neyunithi yokukhutshwa kwe-denitrification);

1.1 Iimpawu zenkqubo yokwenziwa kweLNG

1.1.1 Iyunithi yegesi yokutya kwangaphambili

Indlela yenkqubo yeyunithi yokucocwa kwerhasi yokutya inezi mpawu zilandelayo:

• ● Ukukhutshwa kweasidi ngesisombululo se-MDEA kunento yokwenza nogwebu oluncinane, ukubola okuphantsi kunye nelahleko encinci ye-amine.
• ● I-molecular sieve adsorption isetyenziselwa ukuphelelwa ngamanzi emzimbeni, kwaye isenayo iadsorption ephezulu naphantsi komphunga ophantsi woxinzelelo oluyinxenye.
• ● Ukusebenzisa ikhabhoni efakwe isulfure efakwe kwi-activated ukususa imekyuri kunexabiso eliphantsi. I-Mercury iphendula kunye nesalfure kwisulfure efakwe kwikhabhoni esebenzayo ukuvelisa imekyuri sulfide, ebhengezwa kwikhabhoni esebenzayo ukufezekisa injongo yokususa imekyuri.
• ● Izinto zokucoca ezichanekileyo zinokuhluza i-molecular sieve kunye nothuli lwekhabhoni olusebenzayo ngaphantsi kwe-5μm.

1.1.2 Iyunithi yokunyibilikisa kunye nefriji

Indlela ekhethiweyo yenkqubo yokucima kunye neyunithi yefriji yi-MRC (i-mixed refrigerant) i-refrigeration cycle cycle, ukusetyenziswa kwamandla aphantsi. Le ndlela ineyona ndlela iphantsi yokusetyenziswa kwamandla phakathi kweendlela zefriji ezisetyenziswa ngokuqhelekileyo, okwenza ixabiso lemveliso likhuphisane kwiimarike. Iyunithi yokulinganisa i-refrigerant izimele ngokulinganayo kwiyunithi yoxinzelelo olujikelezayo. Ngethuba lokusebenza, iyunithi yokulinganisa iphinda izalise ifriji kwiyunithi yokunyanzeliswa okujikelezayo, igcine imeko ezinzileyo yokusebenza kweyunithi yokunyanzeliswa okujikelezayo; Emva kokuba iyunithi ivaliwe, iyunithi yokulinganisa inokugcina ifriji ukusuka kwindawo ephezulu yoxinzelelo lweyunithi yoxinzelelo ngaphandle kokukhupha ifriji. Oku akunako ukugcina kuphela ifriji, kodwa kwakhona kunciphise ixesha lokuqalisa elilandelayo.

Zonke iivalve ezikwibhokisi ebandayo zidityanisiwe, kwaye akukho ludibaniso lweflange kwibhokisi ebandayo ukunciphisa iindawo ezivuzayo ezinokubakho kwibhokisi ebandayo.

1.2 Izixhobo eziphambili zeYunithi nganye

2. Inkqubo yokulawula izixhobo

Ukwenzela ukubeka iliso ngempumelelo inkqubo yokuvelisa iseti epheleleyo yezixhobo, kunye nokuqinisekisa ukusebenza okuthembekileyo kunye nokusebenza kakuhle kunye nokugcinwa, inkqubo yokulawula isixhobo ikakhulu ibandakanya:

Inkqubo yolawulo olusasazwayo (DCS)

Inkqubo yesixhobo sokhuseleko (SIS)

I-Alam yoMlilo kunye neNkqubo yeGesi yokubona (FGS)

Umabonakude ovaliweyo (CCTV)

Inkqubo yohlalutyo

Kwaye izixhobo ezichanekileyo eziphezulu (i-flowmeter, i-analyzer, i-thermometer, i-gage yoxinzelelo) ehlangabezana neemfuno zenkqubo. Le nkqubo inikezela ngokufanelekileyo ukucwangciswa, ukugunyazisa kunye nemisebenzi yokubeka iliso, kubandakanywa ukufunyanwa kwedatha yenkqubo, ukulawulwa kwe-loop evaliweyo, imeko yokubeka iliso yokusebenza kwezixhobo, i-alarm interlocking kunye nenkonzo, ukusetyenzwa kwexesha langempela kunye nokubonisa, inkonzo ye-trend, umboniso wegraphic, inkonzo yengxelo yokusebenza kunye neminye imisebenzi. Xa kukho imeko engxamisekileyo kwiyunithi yokuvelisa okanye inkqubo ye-FGS ithumela isignali ye-alamu, i-SIS ithumela isignali ye-interlock yokukhusela ukukhusela izixhobo ezikwi-site, kwaye inkqubo ye-FGS ikwazisa isebe lomlilo wendawo ngexesha elifanayo.

3. Inkqubo eluncedo

Le nkqubo ibandakanya ikakhulu: iyunithi yomoya wesixhobo, iyunithi yenitrogen, iyunithi ye-oyile yokuhambisa ubushushu, iyunithi yamanzi enziwe ngetyuwa kunye neyunithi yokupholisa ejikelezayo yamanzi.