Kuenzanisa kwehunyanzvi uye kusarudzwa
Maitiro e kunyungudutsa gasi rechisikigo Zvinonyanya kusanganisira kucheneswa kwegasi rekudyisa (kuchenesa), kunyungudutsa mvura, kudzvanywa kwemhepo inotonhorera, kuchengetwa kwezvigadzirwa, kurodha zvinhu uye masisitimu ekubatsira. Kuyerera kukuru kunosanganisira kucheneswa kwegasi rekudyisa uye kunyungudutsa mvura inotonhorera.
Kusarudzwa kwemaitiro ekuchenesa gasi rechisikigo
Gasi rechisikigo segasi rekudyisa rinofanira kucheneswa zvakakwana risati ranyungudutswa. Kureva kuti, bvisa gasi rine acid, mvura netsvina mugasi rekudyisa, zvakaita seH2S, CO2, H2O, Hg uye aromatic hydrocarbons, kuitira kuti risaome nechando patembiricha yakaderera uye kudzivirira nekuora kwemidziyo nemapaipi.
A) Tafura 3.1-1 inotsanangura mwero wekushandiswa kwegasi rekudyisa mufekitori yeLNG uye huwandu hwakanyanya hwetsvina.
| Kusachena | Muganho wezviri mukati | Hwaro |
| H2ZVINO | 1ppmV | A (zvinotenderwa 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 acid mugasi muchirongwa ichi.
B) Maitiro ekushaya mvura mumuviri sarudzo
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 ekuderedza mvura mumuviri negasi rechisikigo Kazhinji inosanganisira zvikamu zvitatu: kupera mvura mumuviri panguva yekupisa kwakaderera, kunyudzwa kwe desiccant 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 (triethylene glycol inowanzoshandiswa), nezvimwewo, asi nzira idzi dzine kudzika kwakaderera kwe hydration uye hadzigone kushandiswa mumayuniti e cryogenic; Nzira dzakajairika dze desiccant ye solid desiccant ndeye silica gel method, molecular sieve method 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 absorbed pa activated carbon. Yekutanga inodhura zvakanyanya uye yakakodzera zviitiko zvine mercury yakawanda; Yekupedzisira inodhura zvishoma uye yakakodzera zviitiko zvine mercury shoma.
Kune rumwe rutivi, mutengo wekushandisa hgsiv molecular sieve wakakwira zvikuru; Kune rumwe rutivi, huwandu hwemercury mugasi rekudyisa reyuniti hwakaderera. Nokudaro, kambani iyi ine ruzivo rwakabudirira mukushandisa sarufa yakanyudzwa muactivated carbon kuti ibvise mercury.
Bata nesu:
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Nguva yekutumira: Gunyana-11-2022