Tuam Tshoj Mini LNG cog Hoobkas - 0.7 ~ 3.5 MMSCFD Cov neeg siv khoom me me LNG cov txheej txheem los yog LNG liquefaction cog - Rongteng

Kev sib piv thiab kev xaiv cov txheej txheem technology

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, khoom cia, loading thiab auxiliary system, thiab lwm yam 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.Table 5.1-1 impurities ntawm cov khoom noj khoom haus thiab cov khoom noj khoom haus.

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

Raws li cov ntaub ntawv ntawm cov pa roj, cov dej hauv cov pa roj ntau tshaj li tus qauv thiab yuav tsum tau ua kom huv.

A) Kev xaiv cov txheej txheem deacidification

H2S thiab CO2 muaj nyob rau hauv cov pa roj carbon monoxide yog ua ke hu ua acid gas. Lawv lub neej yuav ua rau cov hlau corrosion thiab ua paug rau ib puag ncig.Ntxiv rau, yog tias cov ntsiab lus CO2 siab dhau lawm, tus nqi calorific ntawm cov pa roj carbon monoxide yuav raug txo.Yog li ntawd, cov ntsiab lus ntawm cov kua qaub hauv cov pa roj carbon monoxide yuav tsum nruj me ntsis tswj kom tau raws li cov txheej txheem thiab cov khoom zoo.

Muaj txoj kev nqus dej hnyav, txoj kev nqus lub cev, oxidation-txo txoj kev thiab molecular sieve adsorption txoj kev rau tshem tawm cov kua qaub los ntawm cov nkev roj.Tam sim no, hnyav nqus txoj kev yog dav lees paub thiab dav siv. Cov kuab tshuaj reacts nrog acid Cheebtsam (tsuas yog CO2) nyob rau hauv pub gas los tsim cov tebchaw. Cov kua roj nplua nuj absorbing kua qaub tuaj yeem decompose thiab tso cov pa roj acid nyob rau hauv cov xwm txheej ntawm qhov kub thiab txias thiab txo qhov siab, thiaj li kom paub txog kev rov tsim dua tshiab thiab siv cov kuab tshuaj.

Hais txog kev siv hluav taws xob, kev kho mob, kev nqis peev thiab cov nqi lag luam, MDEA amine kua txoj kev yog cov txheej txheem tsim nyog tshaj plaws, yog li MDEA amine kua txoj kev xaiv rau deacidification hauv cov tswv yim no.

B) Xaiv cov txheej txheem lub cev qhuav dej

Natural gas dehydration txheej txheem feem ntau suav nrog qhov kub thiab txias dehydration, khoom desiccant adsorption thiab hnyav nqus. Kev sib cais khov yog siv los ua kom tsis txhob muaj cov pa roj carbon monoxide thaum qhov kub thiab txias, tab sis nws qhov kev tso cai qis qis yog txwv, uas tsis tuaj yeem ua tau raws li qhov yuav tsum tau muaj ntawm cov roj liquefaction; Kev nqus cov kuab tshuaj feem ntau suav nrog cov kua qaub (feem ntau concentrated phosphoric acid thiab lwm cov organic acids), glycol (feem ntau siv triethylene glycol), thiab lwm yam, tab sis cov txheej txheem no muaj lub cev qhuav dej tsawg, uas tsis tuaj yeem siv hauv chav tsev cryogenic; Cov txheej txheem desiccant lub cev qhuav dej yog silica gel txoj kev, molecular sieve txoj kev los yog ua ke ntawm ob txoj kev.

Natural gas liquefaction thiab lub cev qhuav dej yuav tsum tau txais cov txheej txheem adsorption khoom. Vim hais tias molecular sieve muaj zog adsorption selectivity, siab adsorption yam ntxwv nyob rau hauv qis dej vapor ib nrab siab, thiab muaj peev xwm ntxiv tshem tawm residual acid roj nyob rau tib lub sij hawm, 4A molecular sieve yog siv raws li lub cev qhuav dej adsorbent nyob rau hauv cov tswv yim no.

C) Kev xaiv cov txheej txheem tshem tawm mercury

Tam sim no, feem ntau yog ob hom kev tshem tawm cov mercury: HGSIV molecular sieve adsorption txoj kev ntawm UOP tuam txhab nyob rau hauv lub tebchaws United States thiab cov tshuaj tiv thaiv ntawm mercury thiab sulfur los ntawm kev siv sulfur impregnated activated carbon los tsim mercury sulfide, uas yog adsorbed ntawm activated carbon. Tus qub yog tus nqi siab thiab haum rau lub sijhawm nrog cov ntsiab lus mercury siab; tom kawg yog tus nqi qis thiab tsim nyog rau lub sijhawm nrog cov ntsiab lus mercury tsawg.

Ntawm qhov tod tes, tus nqi ua haujlwm ntawm HGSIV molecular sieve yog siab heev; Ntawm qhov tod tes, cov ntsiab lus mercury nyob rau hauv cov roj pub ntawm chav tsev no kuj tsawg. Yog li ntawd, kev siv cov sulfur impregnated activated carbon mercury tshem tawm cov txheej txheem, lub tuam txhab muaj kev vam meej.