Iimpawu ze-MDEA zePhysicochemical kunyeumgaqo we-decarburizationyegesi yendalo
I-MDEA, igama lezenzululwazi i-N -methyldiethanolamine, lulwelo lwe-viscous olungenambala okanye olutyheli kancinane.
Ifomula yemolekyuli: CH3N(CH2CH2OH)2 ,
Indawo yokubilisa: 246 ~ 249 ℃ / 760mmhg; ubunzima obuthile: 1.0425g/ml (20 ℃);
Indawo yomkhenkce: -21 ℃ (ubunyulu 99%); viscosity: 101Cp (20 ℃);
Iyakwazi ukuxutywa ngokulula ngamanzi, i-ethanol, i-ether, njl.; i-alkaline ebuthathaka emanzini; Ukusabela kweekhemikhali kuya kwenzeka kwi-asidi ye-carbon dioxide kunye negesi ye-hydrogen sulfide, kwaye kuxinzelelo oluphezulu, i-carbon dioxide kunye ne-hydrogen sulfide gas ziphezulu Ngoko ke yonke inkqubo yokufunxa yinkqubo yokufunxa ngokomzimba kunye neekhemikhali.
Ulwelo olutyebileyo lwe-MDEA emva kokufunxa ihydrogen sulfide kunye nekharbon diokside ingena kwitanki ye-flash ye-vacuum flash evaporation, kwaye emva koko ithunyelwe kwinqaba yokuhlaziya. Ulwelo olutyebileyo lufudunyezwa kwaye luboliswe emazantsi enqaba ukukhulula ngokupheleleyo i-carbon dioxide kunye ne-hydrogen sulfide. Kwangaxeshanye, irhasi esezantsi kwenqaba iyenyuka ukuze yenze isiphumo sokuhluthwa kwesibini kulwelo olutyebileyo kumphezulu wenqaba.; ngoko ke yonke inkqubo yokuhlaziya kwakhona yinkqubo yokuvuselela umzimba kunye neekhemikhali. Ukusabela kweekhemikhali okuthe ngqo kolu hlobo lulandelayo:
R2R'N + H2S R2R'NH +HS (ukusabela kwangoko)
R2R'N+CO2+ H2O R2R'NH +HCO3 (impendulo ecothayo)
Ukufunxa kunye nokuvuselelwaumgaqo we-decarburizationyegesi yendalo
Emva kokuba igesi yokutya ingena kumda webhetri, ukungcola kunye namaconsi kwigesi asuswe ngumhluli wokucoca, kwaye ingena kwinqaba yokufunxa ukusuka ezantsi. Kwinqaba, i-countercurrent idibene nesisombululo se-MDEA esitshizwe ukusuka phezulu. Isisombululo samanzi se-MDEA (isisombululo se-amine esithambileyo) sithatha i-hydrogen sulfide kunye ne-carbon dioxide kwigesi yendalo, ukuze i-hydrogen sulfide kunye ne-carbon dioxide kwigesi yokutya isuswe ukuhlangabezana neemfuno zobugcisa zomnini. Irhasi ecocekileyo ithunyelwa ngaphandle komda ngokusebenzisa isahluli segesi yemveliso emva kokushiya phezulu kwinqaba yokufunxa.
Phantsi kolawulo lwenqanaba lolwelo ivelufa elawulayo, inqanaba lolwelo ezantsi kwinqaba yokufunxa lihambisa i-amine etyebileyo kwitanki ekhanyayo. I-amine ecebileyo esuka ezantsi kwinqaba yokufunxa ingena kwi-flash tank. Uninzi lwee-hydrocarbons ezifunxwe kwi-amine etyebileyo zichithwa kwinqanaba legesi ekhanyayo. Ngaphantsi kolawulo lwevalve yokulawula uxinzelelo, i-flash steam ibuyiselwa kwinkqubo yegesi yamafutha. Ulwelo olutyebileyo lwe-amine luthunyelwa kumtshintshisi wobushushu obhityileyo/otyebileyo we-amine. I-amine eshushu ebhityileyo esuka kwinqaba yokuvuselela itshisa i-amine ecebileyo kwi-flash tank, kwaye ke i-amine ecebileyo ingena kwinqaba yokuvuselela i-amine.
I-steam eyenziwa yi-reboiler ephantsi kwe-amine regeneration tower idibanisa isisombululo se-amine esicebileyo, ihlutha i-asidi ye-asidi kuyo, ngaloo ndlela igqibezela ukuhlaziywa kwe-amine ecebileyo. Phantsi kolawulo lwenqanaba lolwelo ivelufa elawulayo ezantsi kwinqaba yokuvuselela i-amine, isisombululo esishushu se-amine siphuphuma kwi-amine ebhityileyo / etyebileyo yokutshintsha ubushushu. Ipompo ye-amine ebhityileyo ye-booster icinezela i-amine kwitanki ye-amine buffer nge-1.0mpa kwaye iyithumele kwinqaba yokufunxa. Ivalve elawula ukuqukuqela ifakwe kumbhobho obhityileyo we-amine ukuya kwinqaba yokufunxa, apho i-amine ebhityileyo iqukuqela ukuya kwinqaba yokufunxa ilawulwa.
