MDEA Physicochemical properties uyedecarburization musimbotizvegasi rechisikigo
MDEA, zita resainzi N -methyldiethanolamine, imvura isina ruvara kana zvishoma yero viscous fluid.
Molecular formula: CH3N(CH2CH2OH)2 ,
Boiling poindi: 246~249 ℃ /760mmhg ; chaiyo giravhiti: 1.0425g/ml (20 ℃);
Nzvimbo yechando: -21 ℃ (kuchena 99%); viscosity: 101Cp (20 ℃);
Inogona kusanganiswa nyore nyore nemvura, ethanol, ether, nezvimwewo; isina simba alkaline mumvura; chemical reaction ichaitika muacid carbon dioxide uye hydrogen sulfide gas, uye pakumanikidzika kwepamusoro, carbon dioxide nehydrogen sulfide gasi dzinenge dzakakwirira Saka kunyudzwa kwese ndiko kuita kwenyama nemakemikari.
Iyo MDEA yakapfuma mvura mushure mekutora hydrogen sulfide uye kabhoni dhaibhoni inopinda muflash tank yevacuum flash evaporation, uye yozotumirwa kune shongwe yekuvandudza. Mvura yakapfuma inodziya uye yakaora pasi peshongwe kuti ibudise zvachose carbon dioxide uye hydrogen sulfide. Panguva imwecheteyo, gasi riri pashongwe yepasi rinosimuka kuti riite chechipiri chekubvisa mhedzisiro pamvura yakapfuma pamusoro peshongwe.; saka iyo yese yekuzvarwa patsva maitiro zvakare ndeye yemuviri uye kemikari yekuvandudza maitiro. Iyo chaiyo Chemical reaction yakaita seinotevera:
R2R'N + H2S R2R'NH +HS (instant reaction)
R2R'N+CO2+ H2O R2R'NH +HCO3 (slow reaction)
Kutora uye kuvandudzwadecarburization musimbotizvegasi rechisikigo
Mushure mokunge gasi rekudya richipinda mumuganhu webheteri, tsvina uye madonhwe mugasi zvinobviswa nesefa separator, uye inopinda mushongwe yekutora kubva pasi. Mushongwe, inopesana yakasangana neMDEA mhinduro yakapfapfaidzwa kubva kumusoro. Iyo MDEA aqueous solution (amine lean solution) inotora hydrogen sulfide uye carbon dioxide mugasi rechisikigo, kuitira kuti hydrogen sulfide uye carbon dioxide mugasi rekudya zvinobviswa kuti zvizadzise zvinodiwa nemuridzi. Iyo gasi yakanatswa inotumirwa kunze kwemuganhu kuburikidza nechigadzirwa gasi separator mushure mekusiya pamusoro peiyo shongwe yekunyura.
Pasi pekutonga kweiyo fluid level regulating valve, iyo yemvura level iri pazasi peshongwe yekunyura inoendesa yakapfuma amine kune flash tank. Iyo yakapfuma amine kubva pasi peshongwe yekunyura inopinda mu flash tank. Mazhinji ema hydrocarbon akanyudzwa muamine yakapfuma anonyungudutswa kune iyo flash gasi chikamu. Pasi pekutonga kwevhavha inodzvinyirira, iyo flash steam inodzoserwa kumafuta gasi system. Iyo yakapfuma amine liquid inotumirwa kune yakaonda/yakapfuma amine heat exchanger. Iyo inopisa yakaonda amine kubva mushongwe yekuvandudza inopisa iyo yakapfuma amine kubva kune flash tank, uye ipapo mupfumi amine anopinda muamine regeneration tower.
Iyo steam inogadzirwa ne reboiler pazasi peamine regeneration tower inobata hupfumi hweamine solution countercurrent, ichibvisa gasi reasidhi kubva mairi, nokudaro kupedzisa kuvandudzwa kweamine yakapfuma. Pasi pekutonga kweyero yemvura inogadzirisa vharafu iri pazasi peamine regeneration tower, iyo inopisa yakaonda amine mhinduro inofashukira kune yakaonda/yakapfuma amine heat exchanger. Iyo yakaonda amine booster pombi inotsikirira amine muamine buffer tank ne 1.0mpa uye inoitumira kune shongwe yekunyura. Iyo inoyerera inodzora vharafu inoisirwa pane yakaonda amine pombi kune iyo inonyudza shongwe, kuburikidza iyo yakaonda amine inoyerera ichipinda mushongwe yekunyura inodzorwa.
