Mpweya wa mchira wochokera ku makampani oyeretsera mpweya wachilengedwe ukhoza kuthetsedwa mwa kuchepetsa kuyamwa. Mfundo yochepetsera ndi kuyamwa ndi kuyika hydrogenation mu mpweya wa mchira, kuchepetsa zigawo za sulfure mu mpweya wa mchira kukhala H2S, kuyamwa H2S yopangidwa mwanzeru pogwiritsa ntchito njira ya amine, kenako nkubweretsanso kapena kutulutsa mpweyawo, kenako nkulowa mu Claus unit kuti igwiritsidwe ntchito. Njira ya hydrogenation ili ndi ndalama zambiri komanso ndalama zambiri zogwirira ntchito. Komabe, imatha kupeza zokolola zambiri za sulfure, monga zoposa 99.8%, zomwe zimagwiritsidwa ntchito kwambiri m'maiko ndi madera omwe ali ndi zofunikira zambiri zoteteza chilengedwe.
Njira yochepetsera kuyamwa imaphatikizapo njira zotsatirazi: Njira ya Scot, njira ya HCR, njira yobwezeretsanso, njira ya bsrp ndi njira ya RAR.
Njira ya Scot yotchedwa Scot imatanthauza ukadaulo wochizira mpweya wamchira wa chomera cha Claus sulfur cha Dutch Shell. Kawirikawiri, njira yachikhalidwe ya Claus (magawo awiri kapena atatu) imagwiritsidwa ntchito pochizira sulfure. Kuchuluka kwa sulfure pa njira iyi ndi pafupifupi 95% ~ 97%. Masiku ano, zofunikira zotetezera chilengedwe zimakhala zapamwamba kwambiri, ndipo kutulutsa kovomerezeka kumakhala kochepa kwambiri. Ngati chipangizo chochizira sulfure chili ndi mphamvu zambiri, kuchuluka kwa kuchira kumakhala kwakukulu kwambiri (99% kapena kupitirira apo). Pankhaniyi, njira yochizira mpweya wa super Claus kapena Scot tail iyenera kuganiziridwa. Komabe, ngati kuchuluka kwa kuchira kukufunika kuti kupitirire 99.5%, scot ingagwiritsidwe ntchito kokha.
Njira ya HCR, ukadaulo wa njira ya HCR womwe unapangidwa ndi kampani ya ku Italy ya nigi, ndi mtundu wa njira yochepetsera hydrogenation. Chinthu chachikulu cha njirayi ndikugwiritsa ntchito kuchedwa kwa incinerator ndi kutentha kwa mapapo kwa process gasi wa sulfure kupanga ng'anjo kuti itenthe mpweya wammbuyo, kotero palibe chifukwa chowonjezera kutentha, kuti tipeze kubwezeretsanso kutentha kwa zinyalala ndikuchepetsa kwambiri mtengo. Kuphatikiza apo, njirayi sifunikira hydrogen yowonjezera. H2 yomwe yawonongeka ndi Claus section high temperature heavy heating floor ndi yokwanira kuchepetsa sulfure yotsalayo kukhala H2S.
Njira yobwezeretsanso mphamvu ya mpweya (resulf process) yomwe kampani ya TPA imapanga, imaphatikizapo mitundu itatu: njira yobwezeretsanso mphamvu ya mpweya (resulf process), njira yobwezeretsanso mphamvu ya mpweya (resulf-10 process) ndi njira yobwezeretsanso mphamvu ya mpweya (resulf mm process). Mofanana ndi njira ya Scot, mpweya wammbuyo wa Claus unit umatenthedwa kaye, kenako umasakanizidwa ndi mpweya wochepetsera mpweya (reducing gas) wosakanikirana ndi H2 kuti uchepetse mpweya wokhala ndi sulfure mu reactor kukhala H2S. Njirayi ingagwiritsidwe ntchito kukweza kuchuluka kwa sulfure yomwe ilipo ya Claus unit.
Njira ya Brp imapangidwa pamodzi ndi UOP ndi Parsons. Njira ya Brp imagwiritsidwa ntchito makamaka pochiza mpweya wam'mbuyo wa Claus unit. Njirayi yakhala ikugwiritsidwa ntchito kwambiri padziko lonse lapansi.
Chiŵerengero chonse cha sulfure chobwezeredwa cha Claus / bsrp unit chikhoza kufika pa 99.8%. Bsrp imagwiritsa ntchito njira ya anthrone kuti itenge H2S. Kuchuluka kwa H2S mu mpweya wammbuyo wotulutsidwa ndi kochepa, koma pali mavuto ambiri ogwirira ntchito.
Ukadaulo wa Rar KTI wapanga njira yochizira mpweya wam'mbuyo yotchedwa rar (kuchepetsa, kuyamwa ndi kubwezeretsanso). Njirayi imachokera ku ma amine osankha ochepetsa: mfundo ya njirayi imadziwika bwino m'makampani, zomwe zimakhala zofanana ndi zomwe zimagwiritsidwa ntchito m'njira zina zofanana. Njira ya Rar ili ndi magwiridwe antchito odalirika komanso ogwira ntchito bwino, ndipo kuchuluka kwake kobwezeretsa sulfure kumatha kufika 99.9%. Ndi njira yobwezeretsa sulfure yogwira ntchito kwambiri muukadaulo womwe ulipo.
Nthawi yotumizira: Januwale-21-2022