Chidzitiro chezvirimwa cheLNG chakasungirirwa paTPD chine 13~67

Gasi rechisikigo rinonyungudutsa mvura, iro rinodaidzwa kuti LNG, rinoita kuti gasi rechisikigo rive mvura nekutonhodza gasi rechisikigo rinonyungudutsa mvura pasi pekumanikidzwa kwakajairika kusvika -162 ℃. Kunyungudutsa kwegasi rechisikigo kunogona kuchengetedza nzvimbo yekuchengetera nekufambisa, uye kune mabhenefiti ekuva nemafuta akawanda, kushanda kwepamusoro, kunobatsira pakuyera mutoro wemaguta, kunobatsira pakuchengetedzwa kwezvakatipoteredza, kuderedza kusvibiswa kwemaguta nezvimwewo.

Chirongwa chemaitiro acho chinosanganisira: kudzorwa kwesimba remhepo inodyisa uye metering unit, chikamu chekuchenesa gasi rechisikigo uye chikamu chegasi rechisikigo, sisitimu yekuchengetera mafiriji, sisitimu yekumanikidza inotenderera mufiriji, chikamu chekuchengetera nekutakura zvinhu neLNG.

Gasi rechisikigo rinopinda muchiteshi rinotanga rapfuura nepakati pechikamu chinotonga kumanikidzwa uye chekuyera, icho chinoita kuti gasi rechisikigo rigadzirwe uye rigadzirwe; Gasi rechisikigo rinopinda muchikamu chinochenesa gasi rechisikigo, uko gasi rechisikigo rinobviswa CO2, kubviswa H2S uye kurapwa kwekushaya mvura mumuviri. Maitiro eMDEA anokurudzirwa kuti abvise kabhoni uye abvise H2S, maitiro ekubvisa kabhoni nemasero ane shongwe nhatu KANA maitiro ekubvisa mvura mumuviri neTEG anokurudzirwa kuti abvise mvura mumuviri; Uye Zvinokurudzirwa kushandisa BOG yakadzorerwa uye yakamanikidzwa kuti igadzire gasi rekugadzirisa;

Gasi rechisikigo rakacheneswa muchikamu chegasi rechisikigo, musanganiswa we refrigerant (MRC liquefaction process) inokurudzirwa pakunyungudutsa gasi rechisikigo; LNG yakanyungudutswa inochengetwa mutangi rekuchengetera, uye nzira yekuchengetedza mumhepo netembiricha yakaderera inokurudzirwa pakuchengetera LNG. Tangi rimwe rekuchengetera mumhepo rine tembiricha yakaderera rine BG compressor, uye BOG compressor inoshandiswa kudzvanya BOG isati yapinda mu molecular sieve dryer Regeneration, zvichienderana nepombi ye cryogenic kuti iiswe.

Gasi rechisikigo rakanyungudika (LNG) igasi rechisikigo, rinonyanya kushandiswa semethane, rakatonhodzwa kuita semvura kuti rive nyore uye rakachengeteka pakuchengetwa nekutakurwa. Rinotora chikamu chimwe muzvitanhatu chehuwandu hwegasi rechisikigo kana riri mugasi.

Tinopa mafekitori eNatural Gas Liquefaction Plants mudiki (mini) uye mudiki. Kugona kwemafekitori aya kunofukidza kubva pa13 kusvika pa200 matani pazuva ekugadzirwa kweLNG (18,000 kusvika 300,000 Nm).³/d).

Chivako chose cheLNG chinonyungudutsa mvura chinosanganisira masisitimu matatu: sisitimu yekugadzira, sisitimu yekudzora michina uye sisitimu yekushandisa. Zvichienderana nemhepo dzakasiyana, inogona kuchinjwa.

Zvichienderana nemamiriro chaiwo egasi, tinoshandisa nzira yakanakisisa uye hurongwa husingadhuri zvakanyanya kuti tisangane nezvinodiwa nevatengi. Midziyo inosungirirwa paskid inoita kuti kutakurwa nekuiswa zvive nyore.

1. Sisitimu yemaitiro

Gasi rechisikigo rinodzvinyirirwa mushure mekusefa, kupatsanurwa, kudzorwa kwekumanikidzwa uye kuyerwa, uye rozopinda mugadziriro yekurapa gasi rechisikigo. Mushure mekubvisa CO2, gasi rechisikigo rinodzvinyirirwa mushure mekusefa, kupatsanurwa, kudzorwa kwekumanikidzwa uye kuyera, uye rozopinda mugadziriro yekurapa gasi rechisikigo.₂, H₂S ,Hg, H₂O2 nemahydrocarbon anorema, inopinda mubhokisi rinotonhora remvura inonyunguduka. Yobva yatonhodzwa muplate fin heat exchanger, yozoiswa nitrogen mushure mekunyunguduka, yozotonhodzwazve, yozoiswa muflash tank, uye pakupedzisira, chikamu chemvura chakaparadzaniswa chinopinda muLNG storage tank sezvigadzirwa zveLNG.

Chati yemafambiro echigadzirwa cheLNG chakasungirirwa pa skid ndeiyi inotevera:

Maitiro ekugadzira cryogenic LNG Plant anosanganisira:

• ● Kusefa kwegasi rekudyisa, kupatsanura, kudzorwa kwekumanikidzwa uye kuyera kwegasi;

• ● Chigadziko chekumanikidza gasi

• ● Chigadzirwa chekurapa chisati chatanga (kusanganisirakubvisa asidhi mumuviri,kupera mvura mumuviriuye kubviswa kwemahydrocarbon akawanda, kubviswa kwemercury neguruva);

• ● Chikamu cheMR proportioning uye chikamu cheMR compression cycle;

• ● Chigadziko cheLNG chinonyungudutsa mvura (kusanganisira chikamu chekuchenesa mvura);

1.1 Zvinhu zviri muhurongwa hwekuita

1.1.1 Chigadziko chekugadzirisa gasi rinodyisa chikafu

Nzira yekushandiswa kwechikamu chekugadzirisa gasi rekudya ine hunhu hunotevera:

• ●Kubvisa acidization neMDEA solutionine zvakanakira kubuda furo diki, kukora kushoma uye kurasikirwa neamine kudiki.

• ●Kunyudzwa kwesefa yemolecularinoshandiswa pakuderedza mvura mumuviri, uye ichiri nebhenefiti yakakura yekunyungudutsa mvura kunyangwe kana mvura ine simba shoma.

• ● Kushandisa kabhoni yakasanganiswa nesarufa kubvisa mercury mutengo wakaderera. Mercury inopindirana nesarufa pane kabhoni yakasanganiswa nesarufa kuti igadzire mercury sulfide, iyo inonyungudutswa pane kabhoni yakasanganiswa kuti ibudise chinangwa chekubvisa mercury.

• ● Zvinhu zvinogadzirisa firita zvinogona kusefa sipo yemolecular uye guruva rekabhoni rakagadziriswa pasi pe5μm.

1.1.2 Chikamu chekugadzira mvura nefiriji

Nzira yakasarudzwa yekushandisa liquefaction uye firiji ndeye MRC (mixed refrigerant) cycle refrigeration, inova simba shoma rinoshandiswa. Iyi nzira ine simba shoma rinoshandiswa pakati penzira dzinowanzo shandiswa dzefiriji, zvichiita kuti mutengo wechigadzirwa ukwikwidzane pamusika. Refrigerant proportional unit haina kuenzana ne circulating compression unit. Panguva yekushanda, dividending unit inozadza refrigerant kune circulating compression unit, ichichengetedza mamiriro ekushanda akagadzikana e circulating compression unit; Mushure mekunge unit yadzimwa, dividending unit inogona kuchengeta refrigerant kubva muchikamu chekumanikidzwa kwakanyanya che compression unit pasina kuburitsa refrigerant. Izvi hazvingogone kuchengetedza refrigerant chete, asi zvakare kupfupisa nguva inotevera yekutanga.

Mavharuvhu ese ari mubhokisi rinotonhora akasungirirwa, uye hapana kubatana kweflange mubhokisi rinotonhora kuderedza nzvimbo dzinogona kubuda mvura mubhokisi rinotonhora.

1.2 Midziyo mikuru yeYuniti yega yega

2. Sisitimu yekudzora midziyo

Kuti tinyatso tarisa maitiro ekugadzira michina yese, uye kuve nechokwadi chekuti inoshanda zvakanaka uye inoshanda zviri nyore uye inogadzirisa zviri nyore, sisitimu yekudzora michina inosanganisira:

Sisitimu yekudzora yakaparadzirwa (DCS)

Sisitimu yeZvishandiso Zvekuchengetedza (SIS)

Sisitimu yeAlarm yeMoto neGasi (FGS)

Terevhizheni yeClosed-circuit (CCTV)

Sisitimu yekuongorora

Uye zvishandiso zvine hungwaru hwepamusoro (flowmeter, analyzer, thermometer, pressure gage) zvinosangana nezvinodiwa zvemaitiro. Sisitimu iyi inopa mabasa akakwana ekugadzirisa, kuraira uye kutarisa, kusanganisira kutora data reprocess, closed-loop control, mamiriro ekutarisa mashandiro emidziyo, alarm interlocking uye service, real-time data processing and display, trend service, graphic display, operation record report service nezvimwe. Kana paine emergency muproduction unit kana FGS system ikatumira alarm signal, SIS inotumira protection interlock signal kuchengetedza michina iri panzvimbo, uye FGS system inozivisa dhipatimendi refirefighter remunharaunda panguva imwe chete.

3. Sisitimu yekushandisa

Sisitimu iyi inonyanya kusanganisira: mudziyo wemhepo, nitrogen unit, heat transfer oil unit, desalted water unit uye cooling circulating water unit.