I-SCR (Ukuncishiswa Kwe-Catalytic Okukhethiwe): Ukusebenza Nezinzuzo
Akuhlukaniswe

I-SCR (Ukuncishiswa Kwe-Catalytic Okukhethiwe): Ukusebenza Nezinzuzo

26.05.2022 /

Ukunciphisa okukhethiwe kwe-catalytic ukusabela kwamakhemikhali okuguqula ama-nitrogen oxide abe umhwamuko wamanzi kanye ne-nitrogen. Ezimotweni ezinenjini ye-diesel, uhlelo lwe-SCR (selective catalytic reduction) lutholakala exhaust futhi lunciphisa ukungcola ngokuhambisana nezidingo ze-Euro 6 standard.

🔎 Luyini uhlelo lwe-SCR?

I-SCR (Ukuncishiswa Kwe-Catalytic Okukhethiwe): Ukusebenza Nezinzuzo

uhlelo SCR, ngokunciphisa okukhethiwe kwe-catalytic, okubizwa nangokuthi ukunciphisa okukhethiwe kwe-catalytic NgesiFulentshi. Ubuchwepheshe obunciphisa ukukhishwa kwegesii-nitrogen oxides (NOx) izimoto, amaloli, kanye nezimoto.

Ama-NOx angamagesi anobuthi abamba ukushisa. Banikela kakhulu ekungcolisweni komkhathi futhi bavela ikakhulukazi ekushisweni kwezibaseli ezimbiwa phansi njengophethiloli, kodwa ikakhulukazi uphethiloli wedizili.

Selokhu yasungulwa izinga lokuvikela ukungcoliswa kwe-Euro 6 Ngo-2015, imingcele emisha yokukhishwa kwe-nitrogen oxide yabekwa ezimotweni. Isistimu ye-SCR kancane kancane yanda futhi manje isetshenziswa ezimotweni eziningi.

Kusukela ngo-2008, kusukela kwasetshenziswa indinganiso yangaphambilini ye-Euro 5, amaloli afakwe uhlelo lwe-SCR. Namuhla sekuyithuba lezimoto ezintsha zikadizili ezishiye lesi sikhungo eminyakeni edlule.

Ukunciphisa okukhethiwe kwe-catalytic wuhlelo oluvumelayo ukuguqulwa kwe-NOx ku-nitrogen nomhwamuko wamanzi, izithako ezingenabungozi futhi ezingokwemvelo ngokuphelele. Ukwenza lokhu, uhlelo lwe-SCR lwenza ukusabela kwamakhemikhali ekuphumeni, ukudlula kwama-nitrogen oxides nangaphambi kokuba akhululwe.

Isistimu ye-SCR ibe isingena esikhundleni okudala yakudala, ephinde isetshenziselwe ukuguqula amagesi angcolisayo namagesi anobuthi aqukethwe kumagesi akhipha imfucumfucu abe ukungcola okungayingozi kangako ngokuya kolunye uhlobo lokusabela kwamakhemikhali: i-redox noma i-catalytic.

⚙️ Isebenza kanjani i-SCR?

I-SCR (Ukuncishiswa Kwe-Catalytic Okukhethiwe): Ukusebenza Nezinzuzo

I-SCR iwuhlobo lwe-catalyst. Ukunciphisa okukhethiwe kwe-catalytic ukusabela kwamakhemikhali okuguqula i-NOx ibe yinitrogen nomhwamuko wamanzi ukuze kuncishiswe ukukhishwa kwe-nitrogen oxide futhi ngenxa yalokho ukungcoliswa okuvela ekushisweni enjinini yokushisa.

Ngalokhu, i-SCR isebenza ngokubongaI-AdBlue, uketshezi olujovwe yisistimu ku-exhaust. I-AdBlue iqukethe amanzi akhishwe amaminerali kanye ne-urea. Ukushisa okuvela kugesi ophumayo kuguqula i-AdBlue ibe i-ammonia, okudala ukusabela kwamakhemikhali okudingekayo ukuguqula ama-nitrogen oxide abe yi-nitrogen nomhwamuko wamanzi.

Uhlelo lwe-SCR ludinga ukufakwa Ithangi le-AdBlue... Leli thangi lenzelwe lolu ketshezi ngakho-ke liyimoto ozikhethela yona: yengezwa ethangini likaphethiloli. Ingatholakala eduze kweyakamuva, ezingeni lenjini noma esiqwini semoto.

Njengoba i-AdBlue idliwe kancane kancane yi-SCR, kuyadingeka ukugcwalisa uketshezi ngezikhathi ezithile. Lokhu kungenziwa ku-canister noma ngepompo ye-AdBlue endaweni yokusebenzela.

Kusukela ngo-2019, ezinye izimoto zifakwe uhlelo lwe-evolution SCR. Esikhundleni se-catalyst eyodwa, imoto inayo. два : omunye eduze kwenjini, omunye phansi. Lokhu kuvumela ukulawula okungcono nakakhulu ukukhishwa kwezinto ezingcolile.

⚠️ Yiziphi izinkinga i-SCR ezingabhekana nazo?

I-SCR (Ukuncishiswa Kwe-Catalytic Okukhethiwe): Ukusebenza Nezinzuzo

Uhlelo lwe-SCR, ikakhulukazi, lungaba lula ezinhlotsheni ezimbili zokwehluleka:

  • Le ukuntuleka kwe-AdBlue ;
  • Thei-catalyst evaliwe SCR.

I-AdBlue iqukethwe ethangini elikhethekile, okuthi ezimotweni zakamuva ngokuvamile libekwe eduze kwethangi likaphethiloli, elinekepisi ngaphansi kwesivalo sokugcwalisa. Ukusetshenziswa kwe-AdBlue cishe 3% ukusetshenziswa kukadizilinelambu eliyisixwayiso liyakhanya kudeshibhodi uma usalelwe ngu-2400 km kuphela ngaphambi kokuthi yome.

Uma ungengezi i-AdBlue, i-SCR izoyeka ukusebenza. Kodwa ngokungathí sina, imoto yakho izobe inganyakazi. Uzifaka engozini ngeke isiqalo.

Enye inkinga ngohlelo lwe-SCR, ukona, ihlobene nokusebenza kwe-catalyst njenge-catalyst evamile. Njengomphumela wokusabela kwamakhemikhali okubangelwa uhlelo, i-cyanuric acid ikhiqizwa, engaqongelela ku-SCR. Khona-ke idinga ukuchithwa ukuze kuhlanzeke i-exhaust.

Uma isistimu yakho yokunciphisa i-catalytic ingcolile, uzoqaphela izimpawu ezilandelayo:

  • Amandla enjini ayehla ;
  • Injini iyaklinya ;
  • Ukusetshenziswa kukaphethiloli ngokweqile.

Kulokhu, ungalindi ukuthi uhlelo lwe-SCR luhlanzwe. Uma kungenjalo, uzodinga ukukushintsha. Nokho, i-SCR ibiza kakhulu.

Yilokho nje, wazi konke nge-SCR! Njengoba senizwile, lolu hlelo selusabalele kakhulu emotweni ezimotweni zikadizili ukunciphisa ukungcoliswa kwazo... Namuhla isibe isikhali esibalulekile ekulweni ne-nitrogen oxides, amagesi anomphumela oqinile we-greenhouse.

Engeza amazwana