SCR (Selective Catalytic Reduction): Kev Ua Haujlwm thiab Kev Pabcuam

Selective catalytic txo yog cov tshuaj tiv thaiv uas hloov cov nitrogen oxides rau hauv dej vapor thiab nitrogen. Ntawm cov tsheb uas muaj lub cav diesel, SCR (xaiv catalytic txo) qhov system nyob ntawm qhov tso pa tawm thiab txo cov pa phem raws li qhov yuav tsum tau ua ntawm Euro 6 tus qauv.

🔎 SCR system yog dab tsi?

tshuab scr, rau xaiv catalytic txo, kuj hu ua xaiv catalytic txo Hauv Fab Kis. Nws yog ib lub tshuab uas txo cov emissionsnitrogen oxides (NOx) tsheb, tsheb thauj khoom, thiab tsheb.

NOx yog cov tshuaj lom hauv tsev cog khoom. Lawv pab txhawb rau huab cua phem thiab tshwm sim tshwj xeeb los ntawm kev sib xyaw ntawm fossil fuels xws li roj av, tab sis tshwj xeeb tshaj yog cov roj diesel.

Txij li thaum nws pib Kev tiv thaiv cov pa phem Euro 6 Hauv xyoo 2015, qhov pib tshiab rau nitrogen oxide emissions tau teem caij rau tsheb. SCR system maj mam dhau los ua dav thiab tam sim no siv ntau lub tsheb.

Txij li xyoo 2008, txij li yav dhau los Euro 5 tus qauv tau siv, cov tsheb thauj khoom tau nruab nrog SCR system. Niaj hnub no yog qhov tig ntawm lub tsheb tshiab diesel uas tau tso cov nroj tsuag hauv xyoo tas los no.

Selective catalytic txo yog ib qho kev tso cai Kev hloov pauv ntawm NOx rau nitrogen thiab dej vapor, cov khoom xyaw uas tsis muaj teeb meem thiab ntuj tsim. Txhawm rau ua qhov no, SCR system ua cov tshuaj tiv thaiv hauv cov pa tawm, kev tso cai ntawm nitrogen oxides thiab ua ntej lawv tawm.

SCR system ces hloov catalyst classic, uas kuj yog siv los hloov cov pa phem thiab cov pa phem uas muaj nyob rau hauv cov pa pa tawm mus rau cov pa phem tsawg dua raws li lwm hom tshuaj tiv thaiv: redox lossis catalytic.

⚙️ SCR ua haujlwm li cas?

SCR yog ib hom catalyst. Kev xaiv catalytic txo qis yog tshuaj lom neeg cov tshuaj tiv thaiv uas hloov NOx rau nitrogen thiab dej vapor kom txo cov nitrogen oxide emissions thiab yog li muaj kuab paug los ntawm combustion nyob rau hauv lub tshav kub engine.

Rau qhov no, SCR ua haujlwm ua tsaug rauAdBlue, ib tug kua uas yog txhaj los ntawm lub system mus rau hauv lub pa. AdBlue muaj cov dej demineralized thiab urea. Cov cua kub los ntawm cov pa tso pa converts AdBlue rau hauv ammonia, uas tsim cov tshuaj tiv thaiv uas xav tau los hloov nitrogen oxides rau nitrogen thiab dej vapor.

SCR system xav tau kev teeb tsa AdBlue Tank... Lub tank no yog tsim los rau cov kua dej no thiab yog li nws yog xaiv tau rau lub tsheb: nws ntxiv rau lub tank roj. Nws tuaj yeem nyob ib sab ntawm lub tom kawg, ntawm qib cav lossis hauv lub cev ntawm lub tsheb.

Raws li AdBlue tau maj mam noj los ntawm SCR, nws yog qhov tsim nyog los sau cov kua dej ib ntus. Qhov no tuaj yeem ua tiav hauv lub kaus poom lossis nrog lub twj tso kua mis AdBlue ntawm lub rooj cob qhia.

Txij li xyoo 2019, qee lub tsheb tau nruab nrog evolution SCR system. Hloov ntawm ib qho catalyst, lub tsheb muaj ib qho. ob : ib qho ze ntawm lub cav, lwm qhov hauv qab. Qhov no tso cai rau kev tswj kom zoo dua ntawm kev tso pa tawm ntawm cov pa phem.

⚠️ Dab tsi ua rau SCR ntsej muag?

Ib qho SCR system tuaj yeem, tshwj xeeb, raug rau ob hom kev ua tsis tiav:

• Le tsis muaj AdBlue ;
• Tusclogged catalyst scr.

AdBlue muaj nyob rau hauv lub tank tshwj xeeb, uas nyob rau hauv lub tsheb tsis ntev los no feem ntau yog nyob rau ntawm ib sab ntawm lub tank roj, nrog ib tug cap nyob rau hauv lub muab tub lim cap. AdBlue noj yog kwv yees li 3% kev siv dieselthiab lub teeb ceeb toom los ntawm lub dashboard thaum koj tsuas muaj 2400 km sab laug ua ntej nws qhuav.

Yog tias koj tsis ntxiv AdBlue, SCR yuav tsum tsis ua haujlwm. Tab sis qhov tseeb, koj lub tsheb yuav raug immobilized. Koj txaus ntshai ua tsis tau pib.

Lwm qhov teeb meem nrog SCR system, fouling, yuav tsum ua nrog catalyst kev ua tau zoo ib yam li cov pa catalyst. Raws li qhov tshwm sim ntawm cov tshuaj tiv thaiv kab mob tshwm sim los ntawm lub cev, cyanuric acid yog tsim, uas tuaj yeem khaws cia hauv SCR. Tom qab ntawd nws yuav tsum tau muab tshem tawm los ntxuav cov pa tawm.

Yog tias koj qhov kev xaiv catalytic txo cov kab mob kis tau, koj yuav pom cov tsos mob hauv qab no:

• Lub cav fais fab poob ;
• Lub cav choking ;
• Kev siv roj ntau dhau.

Nyob rau hauv cov ntaub ntawv no, tsis txhob tos kom SCR system yuav tsum tau ntxuav. Txwv tsis pub, koj yuav tau hloov nws. Txawm li cas los xij, SCR tseem kim heev.

Qhov ntawd yog nws, koj paub txhua yam txog SCR! Raws li koj twb tau nkag siab lawm, qhov system no tau dhau los ua thoob plaws hauv lub tsheb ntawm cov tsheb diesel rau txo lawv cov pa phem... Niaj hnub no nws tau dhau los ua riam phom tseem ceeb hauv kev sib ntaus sib tua tiv thaiv nitrogen oxides, gases nrog lub tsev cog khoom muaj zog.