Nrog rau qib ntawm kev siv ntawm urea, cov neeg muaj ntau thiab ntau dua ntawm qhov tseem ceeb ntawm qhov zoo ntawm automotive urea.
Yog hais tias qhov zoo ntawm lub tsheb cov tshuaj tsuag yog tsis txaus, qhov sib zog yuav txo qhov kev hloov siab ntawm NOx, thiab tus neeg hnyav yuav ua kom lub qhov kev kho mob tom qab ua qhov tsis ua hauj lwm, los yog ua kom tsis txhob ua haujlwm tom qab ua haujlwm.
Qhov zoo ntawm cov urea siv nyob rau hauv lub tsheb puas cuam tshuam rau tag nrho lub tsheb thiab SCR system li cas? Qhov concentration ntawm urea daws yog ib qho ntawm cov tseem ceeb tseem ceeb.
Cov tshuaj hu ua urea ncaj qha cuam tshuam rau catalytic efficiency ntawm NOx thiab qhov kev ua tau zoo ntawm Urea tov, thiab tseem cuam tshuam qhov teebmeem ntawm qhov kev kho mob tom qab, thiab cov concentration ntawm cov tshuaj tua tau zoo tshaj plaws yuav tsum nyob hauv cov kev cai tswjhwm.
Cov cawv zoo ntawm cov tshuaj tua kab tsuag ntawm SCR cov kua tshuaj tua tsis tau hauv cov dej tsis sib haum ua rau lub cev, cov nyhuv tshuaj tom qab kho cov tshuaj tsuag, yuav txhaws cov pob txha ua pob txha, ua rau kev ua kom zoo dua thiab kev ua haujlwm kom tsawg, twj puas tsuaj. Feem ntau ntawm cov tshuaj tua kab zoo hauv SCR system catalysts SCR catalyst yog cov tub ntxhais ntawm SCR txo tshuab, thiab SCR catalysts yog cov tub ntxhais ntawm SCR catalytic converter. Cov kev ua ntawm catalysts yog qhov tseem ceeb rau kev txhim kho cov hauj lwm ntawm SCR tag nrho.
Performance index ntawm aldehydes nyob rau hauv tsheb aut urea yog teev nyob rau hauv 5ppm, thiab aldehyde tshuaj yuav cuam tshuam lub txheej ntawm cov catalyst hauv SCR system. Zus tau qe yog qhov teeb meem tshwm sim hauv kev siv cov tshuaj kua urea. Kev tsim tawm ntawm cov thooj av tau raug cuam tshuam qhov kev lag luam ntawm SCR system, txawm tshwm sim los ntawm kev txhaws ntawm cov kav dej, qhov dej khov ntawm qhov chaw nyob, thaiv ntawm cov Channel Channel, thiab nws thiaj li SCR qhov ua tsis tiav.
High-zoo urea yuav zoo heev txo cov qoob loo.
1, inferior urea impurities tsim los ntawm lub txuam nrog cov pa roj carbon monoxide
2, lub tank kua dej txhaws pob 3, tsis zoo lub impurities impurities, uas ua rau cov khoom tsis haum hauv lub lim, cov tshuaj tua hluav taws puas lawm