67 ~ 134 TPD skid yakaiswa gasi chaiyo liquefaction unit

System overview

Iyo yekudyisa gasi rechisikigo inopinda mune yakasikwa gasi pretreatment system mushure mekusefa, kupatsanurwa, kudzvanywa mutemo uye metering. Mushure meCO₂Hg uye H₂ O dzinobviswa, inopinda liquefaction inotonhora bhokisi, iyo yakatonhodzwa, liquefied uye nitrogen inobviswa mundiro fin kupisa exchanger, uye ipapo anodzokera kuchando bhokisi kuramba kutonhora, undercooling, throttling uye kupenya kuti flash tank. Iyo yakaparadzaniswa yemvura chikamu inopinda muLNG yekuchengetedza tangi sezvigadzirwa zveLNG.

Iyo huru maitiro uye tekinoroji nzira dzeyuniti ndeidzi:

Shandisa MDEA kubvisa carbon dioxide;

Shandisa Molecular sieve kubvisa trace water;

Shandisa sulfur impregnated activated carbon kubvisa mercury;

Shandisa chaiyo sefa zvinhu kusefa ma molecular sieve uye activated carbon dust

MRC (yakasanganiswa refrigerant) kutenderera firiji maitiro anogamuchirwa kunyungudutsa gasi rose rakacheneswa.

Liquefaction gasi rechisikigo, richangodaidzwa kuti LNG, riri kuita kuti gasi rechisikigo riite mvura nekutonhodza gasi rine gasi rechisikigo pasi pekumanikidzwa kwakajairika kusvika - 162 ℃. Natural gasi liquefaction inogona kuchengetedza zvakanyanya kuchengetedza uye nzvimbo yekufambisa, uye ine zvakanakira hombe calorific kukosha, kushanda kwepamusoro, kunobatsira kuenzana kwekutonga kwemutoro wemaguta, kunobatsira kuchengetedza kwezvakatipoteredza, kuderedza kusvibiswa kwemaguta uye zvichingodaro.

Iyo process scheme inonyanya kusanganisira: kufudza gasi kudzvanywa kudzora uye metering unit,gasi rekuchenesa unituye gasi rechisikigo liquefaction unit, refrigerant storage system, refrigerant circulating compression system, LNG kuchengetedza uye kurodha unit.

Liquefied natural gas (LNG) igasi rechisikigo, kunyanya methane, iro rakatonhodzwa kusvika pachimiro chemvura kuitira nyore uye kuchengetedzeka kwekuchengetedza uye kutakura. Zvinotora anenge 1/600th huwandu hwegasi rechisikigo munzvimbo ine gasi.

Isu tinopa Natural Gasi Liquefaction Zvidyarwa mune micro (mini) uye diki. Kugona kwezvidyarwa kunofukidza kubva pagumi nematatu kusvika kune anopfuura mazana maviri matani / zuva rekugadzirwa kweLNG (18,000 kusvika 300,000 Nm).³/d).

Iyo yakazara LNG liquefaction chirimwa inosanganisira matatu masisitimu: process system, chiridzwa chekudzora system uye utility system. Maererano nemhando dzakasiyana dzemhepo, inogona kuchinjwa.

Zvinoenderana nemamiriro chaiwo egasi sosi, isu tinotora yakanakisa maitiro uye yakanyanya hupfumi chirongwa chekusangana nezvinodiwa zvakasiyana zvevatengi. Skid yakaiswa michina inoita kuti zvekufambisa uye kuisirwa zvive nyore.

1. Process system

Iyo yekudyisa gasi rechisikigo inomanikidzwa mushure mekusefa, kupatsanurwa, kudzvanywa mutemo uye metering, uye yozopinda mugasi rechisikigo pretreatment system. Mushure mekubvisa CO₂, H₂S, Hg, H₂ O uye heavy hydrocarbons, inopinda mu liquefaction cold box. Zvadaro Inotonhodzwa mundiro fin heat exchanger, denitrified mushure mekuita liquefaction, uye inotevera subcooled, throttled uye kupenya kune flash tank, uye chekupedzisira, iyo yakaparadzaniswa yemvura chikamu inopinda muLNG yekuchengetedza tangi seLNG zvigadzirwa.

Iyo inoyerera ye skid yakamisikidzwa LNG Chidyara yakaita seinotevera:

Iyo process system ye cryogenic LNG Plant inosanganisira:

• ● Kudyisa gasi filtration, kupatsanurwa, pressure regulation uye metering unit;

• ● Feed gasi pressurization unit

• ● Pretreatment unit (kusanganisiradeacidification,kupera mvura mumuviriuye inorema hydrocarbon kubviswa, mercury uye kubvisa guruva;

• ● MR proportioning unit uye MR compression cycle unit;

• ● LNG liquefaction unit (kusanganisira denitrification unit);

1.1 Zvimiro zve process system

1.1.1 Feed gasi pretreatment unit

Iyo nzira yekudyira gasi pretreatment unit ine zvinotevera maitiro:

• ●Deacidification neMDEA mhinduroine hunhu hwekupupa hudiki, kuderera kwekuora uye kurasikirwa kweamine diki.

• ●Molecular sieve adsorptioninoshandiswa kudzikisa mvura yakadzika, uye ichiri nepamusoro adsorption mukana kunyangwe pasi pemvura yakadzika mhute chikamu chekumanikidza.

• ● Kushandisa sulfur-impregnated activated carbon kubvisa mercury kwakachipa pamutengo. Mercury inopindirana nesarufa pane sarufa yakaitwa activated kabhoni kuti ibudise mercury sulfide, iyo inoshambadzirwa payakagadzirwa kabhoni kuzadzisa chinangwa chekubvisa mecury.

• ● Precision sefa zvinhu zvinogona kusefa molecular sieve uye activated carbon dust pazasi 5μm.

1.1.2 Liquefaction uye firiji unit

Iyo yakasarudzwa maitiro nzira ye liquefaction uye refrigeration unit ndeye MRC (mixed refrigerant) cycle refrigeration, iyo yakaderera simba rekushandisa. Iyi nzira ine yakaderera simba rekushandisa pakati pezvinowanzo shandiswa firiji nzira, zvichiita kuti mutengo wechigadzirwa ukwikwidze pamusika. Iyo refrigerant proportioning unit yakasununguka pane inotenderera yekumanikidza unit. Munguva yekushanda, chikamu chekuenzanisa chinozadza refrigerant kune inotenderera yekumanikidza unit, kuchengetedza yakagadzikana yekushanda mamiriro ekutenderera anotenderera kumanikidza; Mushure mokunge chikwata ichivharwa, chikamu chekuenzanisa chinogona kuchengetedza firiji kubva kune chikamu chepamusoro-soro chechikwata chekugadzirisa pasina kubvisa firiji. Izvi hazvigone chete kuchengetedza firiji, asiwo kupfupisa inotevera yekutanga nguva.

Ese mavharuvhu mubhokisi rinotonhora akaiswa welded, uye hapana flange yekubatanidza mubhokisi rinotonhora kuti kuderedze zvinokwanisika kubuda mubhokisi rinotonhora.

1.2 Midziyo mikuru yechikamu chimwe nechimwe

2. Instrument control system

Kuti unyatso tarisisa maitiro ekugadzirwa kweseti yakakwana yemidziyo, uye kuve nechokwadi chekushanda kwakavimbika uye nyore kushanda nekugadzirisa, chiridzwa chekudzora sisitimu inonyanya kusanganisira:

Distributed control system (DCS)

Safety Instrument system (SIS)

Moto Alarm uye Gasi Detector System (FGS)

Yakavharwa-inotenderera terevhizheni (CCTV)

Analysis system

Uye yakakwirira-chaiyo zviridzwa (flowmeter, analyzer, thermometer, pressure gage) inosangana nezvinodiwa maitiro. Iyi sisitimu inopa yakakwana kumisikidzwa, yekumisikidza uye yekutarisa mabasa, anosanganisira maitiro ekutora data, yakavharwa-loop control, midziyo yekutarisa mamiriro ekutarisa, alarm interlocking uye sevhisi, chaiyo-nguva data kugadzirisa uye kuratidza, maitiro sevhisi, graphic kuratidza, kushanda rekodhi rekodhi sevhisi uye mamwe mabasa. Kana paine emergency muchikamu chekugadzira kana FGS system inotumira chiratidzo chealarm, iyo SIS inotumira chiratidzo chekudzivirira chekudzivirira kuchengetedza midziyo yepa-site, uye FGS system inozivisa dhipatimendi remoto wenzvimbo panguva imwe chete.

3. Utility system

Iyi sisitimu inonyanya kusanganisira: chiridzwa mhepo unit, nitrogen unit, kupisa kupisa mafuta unit, desalted mvura unit uye inotonhorera inotenderera mvura unit.