Gasi rechisikigo segasi rekudyisa rinofanira kucheneswa zvakakwana risati ranyungudutswa. Kureva, kubvisa gasi rine acid, mvura netsvina mugasi rekudyisa, zvakaita seH2S, CO2, H2O, Hg uye mahydrocarbon anonhuhwirira, kuitira kuti asaome nechando pakupisa kwakaderera uye kudzivirira nekuora kwemidziyo nemapaipi. Tafura 3.1-1 inotsanangura mwero wekugadzirisa gasi rekudyisa mufekitari yeLNG uye huwandu hwakanyanya hwetsvina.
Tafura ine huwandu hwakanyanya hwekusvibiswa hunobvumidzwa hwegasi reLNG feed
| Kusachena | Muganho wezviri mukati | Hwaro |
| H2ZVINO | 1ppmV | A (inotenderwa kudarika muganho wekuparadzwa, pasina kuganhurira kugadzirwa) |
| CO2 | 50～100ppmV | B (Kunyunguduka kwekupedzisira) |
| H2S | ＜4ppmV | C (zvinodiwa zvehunyanzvi zvechigadzirwa) |
| Zvose zviri mu sarufa | 10～50mg/NM3 | C |
| Hg | ＜0.01μg/NM3 | A |
| Hydrocarbon inonhuhwirira | ≤10ppmV | A kana B |
| Mahydrocarbon ese e naphthenic | ≤10ppmV | A kana B |
Kubva padata regasi rekudyisa, huwandu hwekabhoni dhayokisaidhi mugasi rekudyisa hunodarika mwero wezvinodiwa uye hunofanira kucheneswa.
Maitiro emvura yeMDEA amine ndiyo nzira yakakodzera zvakanyanya maererano nekushandiswa kwesimba, chiyero chekurapa, mari yekudyara uye mari yekushandisa. Saka, maitiro emvura yeMDEA amine anosarudzwa kuti abvise acidity muchirongwa ichi.
B) Kusarudzwa kwemaitiro ekushaya mvura mumuviri
Kuvapo kwemvura mugasi rechisikigo kunowanzo konzera migumisiro yakakomba: pasi pemamwe mamiriro ezvinhu, mvura negasi rechisikigo zvinoumba hydrate kuti zvivhare pombi uye zvinokanganisa maitiro ekutonhodza kwemvura; Pamusoro pezvo, kuvapo kwemvura kuchakonzerawo kushandiswa kwesimba risingakoshi; Nekuda kwekupisa kwakaderera kwegasi rechisikigo uye kuvapo kwemvura, michina yacho ichaomeswa nechando uye kuvharwa, saka inofanira kuomeswa nemvura.
Maitiro ekubvisa mvura kubva mugasi rechisikigo anowanzo sanganisira mapoka matatu: kupera mvura kubva mugasi rechisikigo patembiricha yakaderera, kunyudzwa kwedesiccant yakasimba uye kunyudzwa kwe solvent. Kupatsanurwa kwechando kunonyanya kushandiswa kudzivirira hydrate kana tembiricha yegasi rechisikigo yakaderera. Zvisinei, tembiricha yakaderera yainobvumira yakaganhurirwa uye haigone kusangana nezvinodiwa zve liquefaction yegasi rechisikigo; Kunyudzwa kwe solvent kunowanzo sanganisira concentrated acid (kazhinji organic acid senge concentrated phosphoric acid), glycol (inowanzoshandiswa TEG), nezvimwewo, asi nzira idzi dzine kudzika kwakaderera kwemvura uye hadzigone kushandiswa mumayuniti e cryogenic; Nzira dzakajairika dzekubvisa mvura kubva mugasi rechisikigo inzira ye silica gel, nzira ye molecular sieve kana musanganiswa wenzira mbiri idzi.
Nzira yekunyudza yakasimba inofanira kushandiswa pakuderedza mvura kubva mugasi rechisikigo. Nekuti sefa yemamorekuru ine zvakanakira zvekusarudza kwakasimba kwekunyudza, hunhu hwepamusoro hwekunyudza mvura pasi pekumanikidzwa kwakaderera kwemweya wemvura uye kubviswa kwegasi reasidhi rakasara, sefa yemamorekuru ye4A inoshandiswa senzira yekunyudza mvura kubva mugasi rechisikigo muchirongwa ichi.
C) Kusarudzwa kwenzira yekubvisa mercury
Parizvino, kune nzira mbiri huru dzekubvisa mercury: HgSIV molecular sieve adsorption method yekambani yeUOP muUnited States uye sulfur impregnated activated carbon kuti mercury iite sarferi kuti igadzire mercury sulfide uye iite sorbed pa activated carbon. Yekutanga inodhura zvakanyanya uye yakakodzera zviitiko zvine mercury yakawanda; Yekupedzisira inodhura zvishoma uye yakakodzera zviitiko zvine mercury shoma.
Kune rumwe rutivi, mari yekushandisa yeHgSIV molecular sieve yakakwira zvikuru; Kune rumwe rutivi, huwandu hwemercury mugasi rekudyisa reyuniti hwakaderera. Nokudaro, kambani iyi ine ruzivo rwakabudirira mukushandisa sarufa yakaisirwa activated carbon kuti ibvise mercury.
Nguva yekutumira: Ndira-14-2022