Imiterere ya MDEA ya fizikikemike na ihame ryo gukuraho karuboneku bijyanye na gaze karemano
MDEA, izina rya siyansi N -methyldiethanolamine, ni amazi adafite ibara cyangwa umuhondo muto afite viscous.
Formule ya molekile: CH3N(CH2CH2OH)2,
Aho ubushyuhe bushyuha: 246~249 ℃ /760mmhg; uburemere bwihariye: 1.0425g/ml (20 ℃);
Aho ubukonje bugera: -21 ℃ (ubuziranenge 99%); ubushyuhe: 101Cp (20 ℃);
Bishobora kuvangwa byoroshye n'amazi, etanoli, eteri, nibindi; alkaline nkeya mu mazi; imikorere ya shimi izabaho muri aside karubone dioxyde na hydrogen sulfide gaze, kandi iyo umuvuduko mwinshi, carbon dioxide na hydrogen sulfide gaze biba byinshi. Bityo inzira yose yo kwinjiza ni inzira yo kwinjiza fiziki na shimi.
Amazi akungahaye kuri MDEA nyuma yo kwinjiza sulfide ya hidrojeni na dioxyde de carbone yinjira muri tanki ya flash kugira ngo ihindure umwuka wa flash, hanyuma yoherezwe mu munara wo kuvugurura. Amazi akungahaye arashyuha kandi agashonga hasi ku munara kugira ngo arekure burundu dioxyde de carbone na sulfide ya hidrojeni. Muri icyo gihe, gazi iri hasi ku munara irazamuka kugira ngo ikore ingaruka zo gukuraho amazi akungahaye hejuru y'umunara; bityo inzira yose yo kuvugurura ni inzira yo kuvugurura imiterere n'imiti. Uburyo bwihariye bwa shimi ni ubu bukurikira:
R2R'N + H2S R2R'NH + HS (uburyo bwo guhita ubikora)
R2R'N+CO2+ H2O R2R'NH +HCO3 (gukora buhoro buhoro)
Kunywa no kongera kubyaraihame ryo gukuraho karuboneku bijyanye na gaze karemano
Nyuma y’uko umwuka w’ibiryo winjira mu rugero rwa batiri, imyanda n’ibitonyanga biri muri uwo mwuka bikurwaho n’icyuma gitandukanya ibyuma, maze kikinjira mu munara wo kubikuramo uhereye hasi. Mu munara, gihuzwa n’umuyoboro wa MDEA uva hejuru. Umuti w’amazi wa MDEA (umuti w’amine lean) ufata hydrogen sulfide na carbon dioxide muri gazi karemano, bityo hydrogen sulfide na carbon dioxide biri muri gazi bikurwaho kugira ngo huzuzwe ibisabwa na nyirabyo. Umuti w’ibiryo wisukuye woherezwa hanze y’umupaka unyuze mu gitandukanya gazi nyuma yo kuva hejuru y’umunara wo kubikuramo.
Mu gihe cy’igenzura rya valve igenzura urwego rw’amazi, urugero rw’amazi ruri hasi y’umunara wo kwinjiza umwuka rujyana amine ikungahaye kuri flash tank. Amine ikungahaye iva hasi y’umunara wo kwinjiza umwuka yinjira muri flash tank. Hydrocarbon nyinshi zinjira muri amine ikungahaye zishyirwa muri flash gaze phase. Mu gihe cy’igenzura rya valve igenzura umuvuduko, umwuka wa flash usubizwa muri sisitemu ya lisansi. Amine ikungahaye yoherezwa kuri lean/rich amine heat exchanger. Amine ishyushye iva muri regeneration tower ishyushya amine ikungahaye iva muri flash tank, hanyuma amine ikungahaye ijya muri amine regeneration tower.
Umwotsi uva mu cyuma gishyushya amazi kiri hasi mu munara wo kuvugurura amine uhura n’umuyoboro w’amazi urimo amine nyinshi, bigakuraho umwuka wa aside, bityo bikarangiza kuvugurura amine nyinshi. Mu gihe cy’ubuyobozi bwa valve igenzura urwego rw’amazi iri hasi mu munara wo kuvugurura amine, umuti wa amine ushyushye wuzuye ukagera ku cyuma gihindura ubushyuhe cya amine nyinshi. Pompe itera imbaraga amine ishyira ingufu kuri amine iri mu kigega cy’amazi ku gipimo cya 1.0mpa hanyuma ikayohereza mu munara wo kuvugurura. Valve igenzura ubwiyongere bw’amazi ishyirwa ku muyoboro wa amine ugana ku munara wo kuvugurura, aho amine inyura mu munara wo kuvugurura amazi igenzurwa.
