Mpweya wodyetsa gawo lochotsa asidi
Mpweya wothira mpweya wopanikizika umalowa mu chipangizo chochotsa asidi, chomwe chimagwiritsa ntchito njira ya MDEA kuchotsa CO2, H2S ndi mpweya wina wa asidi mu mpweya wothira.
Mpweya wachilengedwe umalowa kuchokera pansi pa choyatsira mpweya ndikudutsa mu choyatsira mpweya kuchokera pansi kupita pamwamba; Yankho la MDEA lokonzedwanso mokwanira (yankho lopanda mafuta) limalowa kuchokera pamwamba pa choyatsira mpweya ndikudutsa mu choyatsira mpweya kuchokera pamwamba kupita pansi. Yankho la MDEA loyenda mozungulira ndi mpweya wachilengedwe zimakhudzidwa kwathunthu mu choyatsira mpweya. CO2 mu mpweya imayamwa ndikulowa mu gawo lamadzimadzi. Zigawo zosayamwa zimatulutsidwa kuchokera pamwamba pa choyatsira mpweya ndikulowa mu choziziritsira mpweya ndi cholekanitsa mpweya. Mpweya wochokera ku choyatsira mpweya choyamwa mpweya umalowa mu unit yoyatsira mpweya wodyetsa, ndipo condensate imapita ku thanki ya flash.
Mpweya wachilengedwe wokonzedwa ndi CO2 wochuluka kuposa 50ppmv.
Yankho la MDEA lomwe limayamwa CO2 limatchedwa yankho lolemera, lomwe limatumizidwa ku flash tower, ndipo mpweya wachilengedwe wopangidwa ndi depressurization flash umatumizidwa ku dongosolo la mafuta. Pambuyo pa kusinthana kwa kutentha pakati pa madzi olemera omwe amawala ndi yankho (madzimadzi osalimba) omwe amatuluka pansi pa regeneration tower, kwezani kutentha kufika ~ 98 ℃ kumtunda kwa regeneration tower, ndikuchita regeneration stripping mu regeneration tower mpaka lean fluid ya lean ifike pa index.
Madzi osalimba ochokera mu nsanja yokonzanso zinthu amadutsa mu chosinthira kutentha chamadzimadzi cholemera komanso chosauka komanso choziziritsira madzi chosalimba. Madzi osalimbawo amaziziritsidwa mpaka ~ 40 ℃, ndikukakamizidwa ndi pampu yamadzimadzi osalimba ndipo amalowa kuchokera kumtunda kwa nsanja yoyamwitsa.
Mpweya wotuluka pamwamba pa nsanja yokonzanso umalowa mu cholekanitsa mpweya wa asidi kudzera mu choziziritsira mpweya wa asidi, mpweya wochokera ku cholekanitsa mpweya wa asidi umatumizidwa ku dongosolo lotulutsa mpweya wa asidi, ndipo condensate imatumizidwa ku cholekanitsa cha flash pambuyo poti pampu yobwezeretsa yapanikizika.
Gwero la kutentha la reboiler la nsanja yokonzanso limatenthedwa ndi mafuta osamutsa kutentha.
Zipangizo zazikulu zogwirira ntchito za chipangizochi ndi nsanja yoyamwitsa ndi nsanja yokonzanso.
Mpweya wodyetsa chipangizo chowumitsira
Chipangizochi chimagwiritsa ntchito ukadaulo wothira mpweya wosinthasintha kutentha kuti chilekanitse ndi kuyeretsa mpweya. Ukadaulo wothira mpweya wosinthasintha kutentha umachokera ku kuthira mpweya wozungulira mkati mwa chinthu chothira mpweya (zinthu zolimba zokhala ndi porous), ndipo umagwiritsa ntchito makhalidwe omwe mphamvu yothira mpweya wodutsa mpweya imasintha ndi kutentha ndi kupanikizika kosiyanasiyana. Ngati chinthucho chimathira mpweya mosankha, chimathira mpweya wosakanikirana pa kutentha kochepa komanso kuthamanga kwambiri. Zinthu zomwe sizimathira mpweya zimatuluka kudzera mu adsorber layer ndikuthira mpweya wodutsa mpweya pa kutentha kwakukulu komanso kuthamanga pang'ono kuti chizitha kuthira mpweya wocheperako komanso kuthamanga kwambiri. Nsanja zingapo zothira mpweya zingagwiritsidwe ntchito kuti zikwaniritse cholinga chothira mpweya mosalekeza.
Chipangizo chowumitsira mpweya wothira chakudya chili ndi zokoka ziwiri zosinthira, kuphatikizapo chimodzi chokoka mpweya, china chokoka mpweya wozizira.
Mpweya wothira chakudya wochokera ku chipangizo chochotsera asidi m'mpweya wothira chakudya umalowa pamwamba pa chipangizo chochotsera asidi m'mpweya. Madzi akachotsedwa kudzera mu sieve ya molecular, amatuluka pansi pa chipangizocho. Mpweya wachilengedwe ukatha madzi m'mpweya wothira chakudya umalowa mu chipangizo chochotsera asidi m'mpweya wothira chakudya.
Chida chochotsera mpweya wochuluka wa hydrocarbon chimagwiritsa ntchito mpweya wochepa woyeretsedwa wa feed ngati njira yozizira komanso yobwezeretsanso.
Mpweya wobwezeretsa umadutsa koyamba kudzera mu adsorber yozizira kuchokera pansi kupita pamwamba, kenako mpweya wobwezeretsa umatenthedwa kufika kutentha kwa 180 ~ 220 ℃ kudzera mu chotenthetsera chobwezeretsa, kenako umalowa kuchokera pansi pa adsorber kuti upange hydrolyze ndikuyamwa adsorbent. Mpweya wobwezeretsa umatuluka pamwamba pa choumitsira ndikulowa mu cholekanitsa mpweya wobwezeretsa utaziziritsidwa ndi choziziritsira chobwezeretsa. Pambuyo polekanitsa madzi, umalowa mu khomo la nsanja yosungira madzi.
Madzi mu mpweya wachilengedwe wouma akadutsa mu chipangizocho, amakhala ≤ 1ppm.
Zipangizo zazikulu ndi nsanja yothira madzi, chotenthetsera chobwezeretsanso, choziziritsira mpweya wobwezeretsanso, cholekanitsa mpweya wobwezeretsanso ndi chokometsera mpweya wobwezeretsanso.
Nthawi yotumizira: Juni-03-2022