KUCHEPETSA MPISI WA CHIFUWA CHONYAMATA NDI LULURRY WA LAYIMU/LIMESTONE

Mawonekedwe

• Kuchotsa sulfure bwino kuposa 99% kungathe kuchitika
• Kupezeka kwa oposa 98% kungapezeke
• Uinjiniya sudalira malo enaake
• Zinthu zogulitsidwa
• Kugwira ntchito kopanda malire kwa magawo
• Njira yokhala ndi maumboni ambiri padziko lonse lapansi

Magawo a Njira

Magawo ofunikira kwambiri a njira yonyowa yochotsera sulphurization ndi awa:

• Kukonzekera ndi kugawa kwa mankhwala oletsa kuyamwa
• Kuchotsa SOx (HCl, HF)
• Kuchotsa madzi ndi kukonza bwino mankhwalawo

Mu njira iyi, miyala yamchere (CaCO3) kapena quicklime (CaO2) ingagwiritsidwe ntchito ngati choyamwitsa. Kusankha chowonjezera chomwe chingawonjezedwe chouma kapena ngati slurry kumapangidwa kutengera momwe polojekiti ikuyendera. Kuti muchotse sulfure oxides (SOx) ndi zigawo zina za acidic (HCl, HF), mpweya wa flue umalumikizidwa kwambiri ndi slurry yokhala ndi chowonjezeracho m'dera loyamwitsa. Mwanjira imeneyi, malo akuluakulu otheka amapezeka kuti asamutsidwe. M'dera loyamwitsa, SO2 kuchokera ku mpweya wa flue imachitapo kanthu ndi choyamwitsa kuti ipange calcium sulphite (CaSO3).

Dothi la miyala yamchere lomwe lili ndi calcium sulphite limasonkhanitsidwa mu dothi loyamwitsa. Dothi la miyala yamchere lomwe limagwiritsidwa ntchito poyeretsa mpweya wa flue limawonjezeredwa nthawi zonse ku dothi loyamwitsa kuti zitsimikizire kuti mphamvu yoyeretsera ya dothi loyamwitsayo ikhalebe yofanana. Dothilo limapopedwanso m'dera loyamwitsa.

Mwa kuuzira mpweya mu sump yoyamwitsa, gypsum imapangidwa kuchokera ku calcium sulphite ndipo imachotsedwa mu ndondomekoyi ngati gawo la slurry. Kutengera ndi zofunikira za mtundu wa chinthu chomaliza, chithandizo china chimachitika kuti apange gypsum yogulitsidwa.

Uinjiniya wa Zomera

Mu mpweya wonyowa wotulutsa mpweya, ma open spray tower absorption agwiritsidwa ntchito kwambiri, omwe amagawidwa m'magawo awiri akuluakulu. Awa ndi malo omwe amayamwa mpweya wotulutsa mpweya ndi madzi onyowa, momwe madzi a laimu amatsekeredwa ndikusonkhanitsidwa. Pofuna kupewa kuyika mu madzi onyowa, madziwo amapachikidwa pogwiritsa ntchito njira zosakaniza.

Mpweya wotuluka umalowa mu choyamwitsa pamwamba pa mlingo wa madzi kenako kudzera m'dera loyamwitsa, lomwe limaphatikizapo kuchuluka kwa kupopera komwe kumafanana ndi chochotsera nthunzi.

Dothi la miyala yamchere lomwe limayamwa kuchokera mu dothi loyamwa madzi limapopedwa bwino pamodzi ndi mpweya wotuluka kudzera mu milingo yopopera. Kapangidwe ka ma nozzles mu nsanja yopopera madzi ndikofunikira kwambiri pakugwira bwino ntchito kwa absorber. Chifukwa chake, kukonza bwino kayendedwe ka madzi ndikofunikira kwambiri. Mu chochotsera nthunzi, madontho omwe amatengedwa kuchokera kumalo oyamwa ndi mpweya wotuluka madzi amabwezedwa ku ndondomekoyi. Pamalo otulukira a absorber, mpweya woyera umadzazidwa ndipo ukhoza kuchotsedwa mwachindunji kudzera mu nsanja yozizira kapena mulu wonyowa. Mwanjira ina, mpweya woyera ukhoza kutenthedwa ndikutumizidwa ku mulu wouma.

Madzi otuluka mu chubu choyamwa madzi amayamba kuchotsedwa madzi kudzera mu hydrocyclones. Kawirikawiri madzi oundanawa omwe amakhalapo kale amachotsedwanso madzi kudzera mu kusefa. Madzi, omwe amapezeka kuchokera mu njirayi, amatha kubwezeretsedwa kwambiri ku chubu choyamwa madzi. Gawo laling'ono limachotsedwa mu njira yoyendera magazi m'njira ya madzi otayika.

Kuchotsa mpweya woipa m'mafakitale, m'mafakitale opanga magetsi kapena m'mafakitale owotcha zinyalala kumadalira ma nozzle omwe amatsimikizira kuti amagwira ntchito molondola kwa nthawi yayitali komanso kupirira nyengo yoipa kwambiri. Ndi makina ake otulutsa mpweya, Lechler imapereka njira zaukadaulo komanso zogwiritsira ntchito zotsukira zopopera kapena zopopera komanso njira zina zochotsera mpweya woipa m'mafakitale (FGD).

Kuchotsa sulfure m'madzi