Ulwazi lwesixazululo esikhethekile se-urea

I-urea yemoto futhi ivame ukuthi i-urea yezolimo inomehluko. I-urea yemoto iwukunciphisa ukungcoliswa kwezinhlanganisela ze-nitrogen ne-hydrogen okukhishwa injini ye-diesel, futhi ibambe iqhaza ekuvikelweni kwemvelo. Inezidingo eziqinile zokufanisa, ezihlanganisa ngokuyisisekelo i-urea yokuhlanzeka okuphezulu namanzi akhishwe. Enye yezimpawu eziyinhloko zekhwalithi yizinga lokulawula ukungcola. Izinhlayiya, ama-ion ensimbi, amaminerali nokunye ukungcola ku-urea kuningi kakhulu, futhi ukulimala kusobala kakhulu. Uma i-urea engafanelekile seyengeziwe, izoholela ekuhlulekeni kwangemva kokucubungula, futhi iveze nokulimala okubulalayo okungenakulungiseka ekucutshungulweni kwayo. Futhi amashumi ezinkulungwane zama-yuan ngemva kokucubungula, noma ukukhetha i-urea yomkhiqizo enconywe umenzi.

Yiziphi izici?

Isixazululo se-urea esikhethekile se-Weichai sihlangabezana nezinga lamazwe ngamazwe le-ISO22241-1, i-DIN70070 evamile yaseJalimane kanye ne-GB29518 evamile kazwelonke, ikhwalithi yofakazi.

Ukulimala kwemikhiqizo engamanga nephansi: ikhwalithi yesisombululo se-urea ephansi ayifinyeleleki ezingeni elijwayelekile, ukuhlanzeka akwanele, ukungcola okuningi ku-urea, kulula ukucwebeza, ukuvimbela umlomo wombhobho we-urea, ngalesi sikhathi, umlomo we-urea ungaba zisusiwe, zishisiwe futhi zibiliswe ukuze zincibilike. Kodwa-ke, ukusetshenziswa kwesikhathi eside kwe-urea yemoto engahlangabezani nezindinganiso zokuhlola ikhwalithi ezishiwo nguhulumeni kuzonciphisa izinga lokuguqulwa kwe-NOx, kunciphise ukusebenza kahle kanye nempilo ye-catalyst, futhi kulimaze ngokungathí sina uhlelo lwe-SCR, okuholela ekuthunyelwe okungenakuhlehliswa. -ukwehluleka kokucubungula.

Ihlanzeke kakhulu

Ukuze kuzuzwe izidingo zekhwalithi ye-urea ephezulu kakhulu, isixazululo se-urea esikhethekile se-Weichai kufanele sidlule ezinhlobonhlobo zokuhlunga kanye nezinhlelo zokuhlunga ngokunemba enqubweni yokukhiqiza, futhi izinto zokupakisha kufanele zingabi nothuli. Isimiso sokusebenza esiyisisekelo sesistimu ye-SCR: i-exhaust ingena epayipini lokukhipha umoya lisuka ku-turbine yeshaja. Ngesikhathi esifanayo, ngeyunithi yomjovo we-urea efakwe ku-DPF, amaconsi e-urea athola i-hydrolysis kanye ne-pyrolysis reaction ngaphansi kwesenzo sokushisa okuphezulu kwegesi yokukhipha igesi, okukhiqiza i-NH3 edingekayo, i-NH3 inciphisa i-NOx ku-N2 ngaphansi kwesenzo se-catalyst. Kuhlelo lokunciphisa i-SCR, ukugxila kwesisombululo se-urea kungenye yezinto ezibalulekile, kodwa ukugxila okuphezulu kakhulu noma okuphansi kakhulu akukwazi ukuthuthukisa ukusebenza kahle kokuguqulwa kwe-NOx, kodwa kuzobangela ukushelela kwe-ammonia kanye nokwakhiwa kwe-ammonia yesibili engcolile.

Ukuguqulwa okuphezulu

Ngesixazululo esikhethekile se-urea ene-concentration ye-32.5% njenge-ejenti yokunciphisa; Njengokucushwa okujwayelekile kohlelo lwe-SCR lwangemva kokwelashwa, ukusetshenziswa kwe-urea kubala cishe u-5% wokusetshenziswa kukaphethiloli. Thatha umthamo we-23Lde urea tank njengesibonelo, i-mileage ingafinyelela kumakhilomitha ayi-1500-1800.

I-Urea yengeza amanzi: ngokuvamile othile uyabuza ukuthi i-urea ingakwazi yini ukwengeza amanzi amaminerali, amanzi angenalutho abilisiwe nezinye izinto. Lokhu akunakwenzeka neze, kukhona ukungcola okuningi emanzini kampompi, okungaphezu kwalokho esikubona ngamehlo enyama. I-calcium, i-magnesium, i-sodium nezinye izakhi emanzini kampompi kanye namanzi amaminerali kulula ukwakha izinto eziqinile, ngaleyo ndlela zivimbe umlomo we-urea, okuholela emaphutha ngemuva kokucubungula. I-liquid engezwe ku-urea, ingaba amanzi angcolile kuphela. Izinga loketshezi lwethangi le-urea kufanele ligcinwe phakathi kuka-30% no-80% wesamba sevolumu yethangi le-urea. Ukugcinwa kwe-Urea: Isixazululo se-Urea kufanele sigcinwe esitsheni esivaliwe endaweni epholile, eyomile, kude nama-oxidants aqinile. Lapho ugcwalisa, njengokuthi ngqo ethangini le-urea ulahla i-urea splashing, futhi ukhiqize ukungcoliswa kwemvelo. Kunconywa imishini yokugcwalisa yochwepheshe.

Inothi lokugcwalisa urea: Isixazululo se-urea siyagqwala esikhumbeni. uma isikhumba noma amehlo engeziwe, hlambulula ngamanzi ngokushesha ngangokunokwenzeka; uma ubuhlungu buqhubeka, sicela ufune usizo lwezokwelapha. Uma ugwinywe ngokunganaki, vimbela ukuhlanza, funa ukwelashwa ngokushesha