MDEA fizikisikemikari hunhu uye musimboti wekubvisa kabhoniyegasi rechisikigo
MDEA, zita resainzi rekuti N -methyldiethanolamine, imvura isina ruvara kana kuti yero zvishoma ine viscous.
Fomura yemasero: CH3N(CH2CH2OH)2,
Pokufashaira: 246~249 ℃ /760mmhg; giravhiti chaiyo: 1.0425g/ml (20 ℃);
Nzvimbo yechando: -21 ℃ (kuchena 99%); viscosity: 101Cp (20 ℃);
Inogona kusanganiswa nyore nyore nemvura, ethanol, ether, nezvimwewo; alkaline shoma mumvura; makemikari anoitika mu acid carbon dioxide nehydrogen sulfide gas, uye kana paine kumanikidzwa kwakanyanya, carbon dioxide nehydrogen sulfide gas dzine zvakawanda. Saka nzira yese yekunyudzwa ndeyekunyudzwa kwemuviri nemakemikari.
Mvura ine hupfumi hweMDEA mushure mekunwa hydrogen sulfide necarbon dioxide inopinda muflash tank kuti iparadze flash, uye yozotumirwa ku regeneration tower. Mvura ine hupfumi inopiswa uye inoora pasi pe tower kuti ibudise carbon dioxide nehydrogen sulfide zvakakwana. Panguva imwe chete, gasi riri pasi pe tower rinokwira kuti riite secondary stripping effect pamvura ine hupfumi pamusoro pe tower. Saka maitiro ese e regeneration ndiwo maitiro e physical uye chemical regeneration. Maitiro chaiwo emakemikari ndeaya anotevera:
R2R'N + H2S R2R'NH +HS (kuita pakarepo)
R2R'N+CO2+ H2O R2R'NH +HCO3 (kuita zvishoma nezvishoma)
Kunyudzwa uye kudzorerwa patsvamusimboti wekubvisa kabhoniyegasi rechisikigo
Mushure mekunge gasi rekudya rapinda mumuganhu webhatiri, tsvina nemadonhwe ari mugasi zvinobviswa nemuchina wekuparadzanisa mafirita, uye zvinopinda mushongwe yekunyudza kubva pasi. Mushongwe, zvinosangana nemhinduro yeMDEA inopfapfaidzwa kubva kumusoro. Mhinduro yemvura yeMDEA (amine lean solution) inonyudza hydrogen sulfide necarbon dioxide mugasi rechisikigo, kuitira kuti hydrogen sulfide necarbon dioxide mugasi rekudya zvibviswe kuti zvienderane nezvinodiwa nemuridzi. Gasi rakacheneswa rinotumirwa kunze kwemuganhu kuburikidza nemuchina wekuparadzanisa gasi rechigadzirwa mushure mekubuda pamusoro peshongwe yekunyudza.
Pasi pekutonga kwevharuvhu rinodzora huwandu hwemvura, huwandu hwemvura huri pasi peshongwe yekunyudza hunoendesa amine yakapfuma kuflash tank. Amine yakapfuma inobva pasi peshongwe yekunyudza inopinda muflash tank. Mazhinji emahydrocarbon anonyudzwa muamine yakapfuma anobviswa kusvika kuflash gas phase. Pasi pekutonga kwevharuvhu rinodzora kumanikidzwa, steam inodzoserwa kusystem yemafuta. Mvura yakapfuma yeamine inotumirwa kune lean/rich amine heat exchanger. Amine inopisa ye lean inobva ku regeneration tower inopisa amine yakapfuma kubva kuflash tank, uye ipapo amine yakapfuma inopinda muamine regeneration tower.
Utsi hunogadzirwa ne reboiler iri pasi pe amine regeneration tower hunosangana ne rich amine solution countercurrent, huchibvisa acid gasi kubva mairi, nokudaro huchipedzisa regeneration ye rich amine. Pasi pekutonga kwe liquid level regulating valve iri pasi pe amine regeneration tower, hot lean amine solution inozadza kusvika kune lean/rich amine heat exchanger. Lean amine booster pombi inomanikidza amine iri mu amine buffer tank ne 1.0mpa uye inoitumira ku absorption tower. Flow regulating valve inoiswa pa lean amine pipeline kuenda ku absorption tower, iyo lean amine inoyerera ichipinda mu absorption tower inodzorwa.
