0.7 ~ 3.5 MMSCFD Cov neeg siv khoom me me LNG cov txheej txheem los yog LNG liquefaction cog

Liquefied natural gas (LNG) yog cov pa roj ntsha, feem ntau yog methane, uas tau ua kom txias rau hauv cov kua dej kom yooj yim thiab kev nyab xeeb ntawm kev khaws cia thiab thauj. Nws yuav siv li ntawm 1/600th qhov ntim ntawm cov pa roj hauv lub xeev gaseous.

Peb muab Natural Gas Liquefaction Plants hauv micro (mini) thiab me me. Lub peev xwm ntawm cov nroj tsuag npog los ntawm 13 mus rau ntau tshaj 200 Tons / hnub ntawm LNG ntau lawm (18,000 txog 300,000 Nm³/d).

Pub gas:

• ● Stranded gas teb

• ● Associated / flared gas

• ● Biogas

• ● Pipeline roj

Ib qho ua tiav LNG liquefaction cog suav nrog peb lub tshuab: txheej txheem txheej txheem, ntsuas ntsuas qhov system thiab kev siv hluav taws xob. Raws li cov huab cua sib txawv, nws tuaj yeem hloov tau.

Raws li qhov teeb meem tiag tiag ntawm cov roj av, peb txais yuav cov txheej txheem zoo tshaj plaws thiab cov phiaj xwm kev lag luam tshaj plaws kom tau raws li qhov sib txawv ntawm cov neeg siv khoom. Skid mounted khoom ua rau kev thauj mus los thiab kev teeb tsa yooj yim dua.

1. Txheej txheem txheej txheem

Cov pa roj noj yog pressurized tom qab pom, sib cais, kev tswj siab thiab ntsuas, thiab tom qab ntawd nkag mus rau hauv cov pa roj pretreatment system. Tom qab tshem tawm CO₂, H₂S, Hg, H₂ O thiab hnyav hydrocarbons, nws nkag mus rau lub liquefaction txias lub thawv. Tom qab ntawd nws yog txias rau hauv lub phaj fin heat exchanger, denitrified tom qab liquefaction, thiab tom ntej no subcooled, throttled thiab flashed mus rau lub flash tank, thiab kawg, lub cais kua theem nkag mus rau hauv lub LNG cia tank li LNG khoom.

Daim ntawv qhia txog kev caij tsheb kauj vab mounted LNG Plant yog raws li nram no:

Cov txheej txheem ntawm cryogenic LNG tsob nroj suav nrog:

• ● Pub roj pom, kev sib cais, kev tswj siab thiab ntsuas ntsuas;

• ● Pub roj cua siab chav tsev

• ● Pretreatment unit (xws lideacidification,lub cev qhuav dejthiab hnyav hydrocarbon tshem tawm, mercury thiab plua plav tshem tawm);

• ● MR proportioning unit thiab MR compression cycle unit;

• ● LNG liquefaction unit (nrog rau chav denitrification);

1.1 Nta ntawm cov txheej txheem system

1.1.1 Pub gas pretreatment unit

Cov txheej txheem ntawm pub roj pretreatment chav tsev muaj cov yam ntxwv hauv qab no:

• ●Deacidification nrog MDEA dawsmuaj qhov zoo ntawm me me foaming, tsawg corrosiveness thiab me me amine poob.

• ●Molecular sieve adsorptionyog siv rau lub cev qhuav dej sib sib zog nqus, thiab nws tseem muaj qhov zoo adsorption zoo txawm tias nyob rau hauv qis dej vapor ib nrab siab.

• ● Siv sulfur-impregnated activated carbon kom tshem tawm cov mercury yog pheej yig tus nqi. Mercury reacts nrog sulfur ntawm sulfur impregnated activated carbon los tsim mercury sulfide, uas yog adsorbed ntawm activated carbon kom ua tiav lub hom phiaj ntawm mercury tshem tawm.

• ● Precision lim ntsiab tuaj yeem lim cov molecular sieve thiab cov pa roj carbon activated hauv qab 5μm.

1.1.2 Liquefaction thiab tub yees chav tsev

Cov txheej txheem xaiv ntawm liquefaction thiab tub yees chav tsev yog MRC (mixed refrigerant) lub voj voog tub yees, uas yog siv hluav taws xob tsawg. Txoj kev no muaj kev siv hluav taws xob qis tshaj plaws ntawm cov txheej txheem siv tub yees, ua rau cov khoom lag luam sib tw hauv kev ua lag luam. Lub refrigerant proportioning unit yog tus kheej ntawm lub circulating compression unit. Thaum lub sij hawm ua hauj lwm, lub proportioning unit replenishes refrigerant mus rau lub circulating compression unit, tswj lub ruaj khov ua hauj lwm mob ntawm lub circulating compression unit; Tom qab lub tsev kaw lawm, lub proportioning unit tuaj yeem khaws cov tub yees los ntawm qhov siab-siab ntawm compression unit yam tsis tas tso cov tub yees. Qhov no tuaj yeem tsis tsuas yog txuag cov tub yees, tab sis kuj tseem ua rau lub sijhawm pib ua haujlwm tom ntej.

Tag nrho cov li qub hauv lub thawv txias yog welded, thiab tsis muaj flange kev twb kev txuas hauv lub thawv txias kom txo tau cov ntsiab lus to hauv lub thawv txias.

1.2 Cov khoom siv tseem ceeb ntawm txhua chav tsev

2. Cov cuab yeej tswj qhov system

Txhawm rau saib xyuas cov txheej txheem tsim khoom ntawm cov cuab yeej ua tiav, thiab kom ntseeg tau tias kev lag luam txhim khu kev qha thiab kev ua haujlwm yooj yim thiab kev saib xyuas, cov cuab yeej tswj hwm feem ntau suav nrog:

Distributed tswj system (DCS)

Safety Instrument System (SIS)

Fire Alarm thiab Gas Detector System (FGS)

Kaw-Circuit TV (CCTV)

Kev ntsuas qhov system

Thiab cov cuab yeej ua haujlwm siab (flowmeter, analyzer, thermometer, siab gage) uas ua tau raws li cov txheej txheem. Lub kaw lus no muab cov kev teeb tsa zoo tshaj plaws, commissioning thiab saib xyuas kev ua haujlwm, suav nrog cov txheej txheem tau txais cov ntaub ntawv, kaw-voj tswj, cov khoom siv ua haujlwm saib xyuas cov xwm txheej, tswb cuam tshuam thiab kev pabcuam, cov ntaub ntawv siv sijhawm thiab cov khoom siv, cov kev pabcuam sib txawv, cov duab kos duab, cov ntaub ntawv qhia txog kev ua haujlwm thiab lwm yam haujlwm. Thaum muaj xwm txheej ceev hauv chav tsim khoom lossis FGS qhov system xa lub tswb ceeb toom, SIS xa cov teeb liab thaiv kev tiv thaiv los tiv thaiv cov khoom siv ntawm qhov chaw, thiab FGS system qhia rau lub chaw tua hluav taws hauv zos tib lub sijhawm.

3. Kev siv hluav taws xob

Qhov system no feem ntau suav nrog: ntsuas cua chav tsev, chav nitrogen, chav hloov roj cua sov, chav dej desalted thiab chav dej txias.

4. Kev sib piv thiab xaiv cov txheej txheem thev naus laus zis

Cov txheej txheem ntawm cov roj liquefaction muaj xws li pretreatment (purification) ntawm cov roj nyoos, liquefaction (los yog LNG liquefaction cog), refrigerant ncig compression, cov khoom cia, loading thiab auxiliary system, thiab lwm yam. cov txheej txheem tseem ceeb muaj xws li purification ntawm raw roj thiab liquefaction ntawm purified gas. .

Kev xaiv cov txheej txheem ntawm cov roj purification

Raws li cov roj av nyoos, cov roj ntsha ntuj yuav tsum tau ua kom huv si ua ntej liquefaction.Qhov ntawd yog kom tshem tawm cov roj acid, dej thiab impurities hauv cov pa roj, xws li H2S, CO2, H2O, Hg thiab cov pa roj carbon monoxide, kom tsis txhob thaiv thiab corrosion ntawm cov khoom siv thiab cov kav dej vim yog khov ntawm qhov kub thiab txias. Cov lus hauv qab no teev cov qauv ua ntej thiab cov ntsiab lus siab tshaj plaws ntawm impurities ntawm pub roj hauv LNG cog.

Qhov siab tshaj plaws tso cai impurity cov ntsiab lus ntawm LNG pub ​​roj