Uketshezi lwezinhlelo ze-SCR. Sinamathela ezindinganisweni zemvelo
Okuqukethwe
I-SCR ibizwa ngokuthi i-selective ngoba iklanyelwe ukunciphisa kuphela ama-oxide ayingozi e-nitrogen kumagesi aphuma ezinjinini zikadizili. Indlela iphumelela kakhulu, kodwa isisombululo se-urea siba yinto eyengeziwe yokugcwalisa.
Indlela uhlelo olusebenza ngayo
I-Urea ngokusebenzisa i-nozzle ingena kumagesi okukhipha ngemva kokukhipha okuningi kuya ku-catalyst. Uketshezi luvusa ukubola kwe-nitrogen oxide emanzini kanye ne-nitrogen - izinto zemvelo ezitholakala ezilwaneni zasendle.
Izidingo ze-New Environment Commission ku-European Union ziphoqa abakhiqizi bezimoto ukuthi balawule izindinganiso zokukhishwa kwezimoto futhi bafake ama-SCR ezimotweni ezinezinjini zikadizili.
Izakhiwo zomzimba nezamakhemikhali
Uketshezi lohlelo lwe-SCR Adblue, luqukethe isixazululo samanzi ne-urea:
- Amanzi ancibilikisiwe - isisombululo esingu-67,5%;
- Urea - 32,5% isixazululo.
I-Adblue itholakala kupulasitiki wayo noma ithangi lensimbi, ikakhulukazi eduze nethangi likaphethiloli. I-tank ifakwe i-cap eluhlaza okwesibhakabhaka entanyeni yokugcwalisa, inombhalo ohambisanayo we-Adblue. Izintamo zokugcwalisa ze-urea kanye namathangi kaphethiloli anama-diameter ahlukene ukuze asuse ukuthi kungenzeka iphutha lapho ufaka i-refueling.
Indawo eqandayo ye-urea ingu-11 °C, ithangi le-urea lifakwe isifudumezi salo. Futhi, ngemva kokumiswa kwenjini, iphampu ekwimodi ehlehlayo impompa i-reagent emuva ethangini. Ngemuva kweqhwa, i-urea encibilikisiwe igcina izakhiwo zayo zokusebenza futhi ilungele ukusetshenziswa okwengeziwe.
Ukugeleza kwamanzi kanye nezidingo zokusebenza
Isilinganiso esisetshenziswa uketshezi olusebenzayo lwe-SCR cishe singu-4% wokusetshenziswa kukaphethiloli wedizili ezimotweni zabagibeli, futhi cishe u-6% elolini.
Uhlelo lokuxilonga lwemoto olusebhodini lulawula imingcele eminingi yesisombululo se-urea:
- izinga ohlelweni.
- Izinga lokushisa le-urea.
- Ukucindezela kwesisombululo se-urea.
- Umthamo womjovo owuketshezi.
Iyunithi yokulawula ixwayisa umshayeli ngokukhanyisa isibani esingasebenzi kahle kudeshibhodi ukuthi isixazululo sidliwa ngokushesha futhi ithangi alinalutho ngokuphelele. Umshayeli unesibopho sokugcwalisa i-reagent phakathi nohambo. Uma izexwayiso zesistimu zishaywa indiva, amandla enjini ayancipha ukusuka ku-25% ukuya ku-40% kuze kugcwaliswe i-reagent. Iphaneli yensimbi ibonisa isibali samakhilomitha kanye nenombolo yenjini iyaqala; ngemva kokusetha kabusha isibali, ngeke kwenzeke ukuqalisa injini yemoto.
Kuyadingeka ukugcwalisa uketshezi lwezinhlelo ze-SCR kuphela kubakhiqizi abathembekile be-urea: BASF, YARA, AMI, Gazpromneft, Alaska. Ukugcwalisa ithangi ngamanzi noma olunye uketshezi kuzokhubaza isistimu yokukhipha umoya.
