MDEA Physicochemical Properties daka'idar decarburizationga iskar gas
MDEA, sunan kimiyya N-methyldiethanolamine, ruwa ne mara launi ko dan kadan.
Tsarin kwayoyin halitta: CH3N (CH2CH2OH) 2 ,
Tushen tafasa: 246 ~ 249 ℃ / 760mmhg; musamman nauyi: 1.0425g/ml (20 ℃);
Daskarewa: -21 ℃ (tsarki 99%); danko: 101Cp (20 ℃);
Yana iya zama sauƙi miscible tare da ruwa, ethanol, ether, da dai sauransu; rashin ƙarfi alkaline a cikin ruwa; sinadaran sinadaran zai faru a cikin acid carbon dioxide da hydrogen sulfide gas, kuma a mafi girma matsa lamba, carbon dioxide da hydrogen sulfide gas suna da mafi girma Saboda haka dukan sha tsari ne na jiki da kuma sinadaran sha.
Ruwan mai wadataccen ruwa na MDEA bayan ya sha hydrogen sulfide da carbon dioxide yana shiga cikin tankin walƙiya don ƙaurawar walƙiya, sannan a aika zuwa hasumiya ta sabuntawa. Ruwan da ke da wadataccen ruwa yana zafi kuma yana ruɓe a ƙasan hasumiya don sakin carbon dioxide da hydrogen sulfide gaba ɗaya. A lokaci guda, iskar gas a gindin hasumiya ya tashi don samar da sakamako na biyu na cirewa akan ruwa mai wadata a saman hasumiya; don haka gaba dayan tsarin farfadowa kuma shine tsarin farfadowar jiki da sinadarai. Takamammen halayen sinadaran kamar haka:
R2R'N + H2S R2R'NH + HS (aiki nan take)
R2R'N+CO2+ H2O R2R'NH+HCO3 (hannun ra'ayi)
Shayewa da sabuntawaka'idar decarburizationga iskar gas
Bayan iskar gas ɗin abinci ya shiga iyakar baturi, ƙazanta da ɗigon ruwa a cikin iskar gas ɗin ana cire su ta hanyar mai raba tacewa, kuma yana shiga hasumiya mai ɗaukar nauyi daga ƙasa. A cikin hasumiya, ana tuntuɓar ta tare da maganin MDEA da aka fesa daga sama. Maganin ruwa na MDEA (amine lean solution) yana ɗaukar hydrogen sulfide da carbon dioxide a cikin iskar gas, don haka an cire hydrogen sulfide da carbon dioxide a cikin iskar gas ɗin don biyan buƙatun fasaha na mai shi. Ana aika iskar gas ɗin da aka tsarkake daga kan iyaka ta hanyar mai raba iskar gas bayan barin saman hasumiya mai sha.
Ƙarƙashin ikon sarrafa matakin ruwa mai daidaita bawul, matakin ruwa a ƙasan hasumiya mai ɗaukar nauyi yana isar da amintaccen amine zuwa tankin walƙiya. Amine mai arziki daga kasan hasumiya ta sha ta shiga cikin tankin walƙiya. Yawancin hydrocarbons da ke shiga cikin amine mai arziƙi an lalata su zuwa lokacin walƙiya na iskar gas. Karkashin kula da bawul mai sarrafa matsa lamba, ana dawo da tururi mai walƙiya zuwa tsarin iskar gas. Ana aika ruwan amine mai wadata zuwa ga ma'aunin zafi na amine. Amine mai zafi mai zafi daga hasumiya na sabuntawa yana dumama amintaccen aminin daga cikin tankin walƙiya, sannan amintaccen amintaccen aminin ya shiga hasumiya ta sabuntar amin.
Tururuwar da injin sake sake ginawa a kasan hasumiyar amine ta hasumiya ta tuntubi arziƙin amintaccen maganin amine da ke ɓata lokaci, yana cire iskar acid ɗin daga gare ta, ta haka ya kammala farfadowar amine mai albarka. Ƙarƙashin ikon matakin ruwa mai daidaita bawul a kasan hasumiya ta sake haɓaka amine, maganin amine mai zafi yana malalowa zuwa ga mai musanya zafi na amine. Famfu na ƙaramar amine mai ɗanɗano yana matsar da aminin a cikin tankin ajiyar amine ta 1.0mpa kuma ya aika zuwa hasumiya ta sha. Ana shigar da bawul mai sarrafa kwarara akan bututun amine mai jingina zuwa hasumiya mai ɗaukar nauyi, ta inda ake sarrafa magudanar ruwan amine cikin hasumiya mai ɗaukar nauyi.
