Cov kev tshawb fawb txog kev kho cov pa tawm ntawm lub cav diesel tom qab kho yog nyob ib puag ncig kev tshem tawm NOX thiab PM. Thiab muaj ntau yam kev ntsuas kev ntxuav tau tshwm sim. Cov thev naus laus zis ntxuav cov pa tawm ntawm lub cav diesel feem ntau suav nrog cov pa tawm rov ua dua (EGR), oxidation catalytic converter (DOC), diesel particulate filter (DPF), selective catalytic reduction system (SCR), thiab ammonia escape trap (ASC).
1.EGR (Kev Hloov Pa Pa Tawm)Lub kaw lus rov ua kom cov pa tawm rov qab los, uas cais ib feem ntawm cov pa tawm ntawm lub cav sib xyaw thiab coj nws mus rau sab nkag rau kev sib xyaw ntxiv, tuaj yeem ua tiav qhov cuam tshuam ntawm kev tswj hwm kev tsim cov nitrogen oxides thiab txhim kho kev siv roj.
2.DOC (Diesel Oxidation Catalyst)yog ib qho thev naus laus zis diesel oxidation catalyst uas siv cov catalysts uas muaj cov hlau muaj nqis los oxidize HC, CO, NO, thiab cov nqi volatile ntawm cov khoom me me hauv lub cav pa tawm, yog li txo cov HC, CO, thiab PM.
3. DPF (Diesel Particulate Lim)yog ib hom lim dej uas tau teeb tsa rau hauv lub tshuab tso pa tawm ntawm cov cav diesel, feem ntau yog siv los ntes cov khoom me me (PM) hauv cov pa tawm.
4. SCR (Kev Txo Catalytic Xaiv)lub tshuab yog ib txoj thev naus laus zis uas siv urea los xaiv txo cov nitrogen oxides (cov pa lom) hauv cov pa tso tawm mus rau hauv nitrogen thiab dej (uas tsis muaj teeb meem).
5. ASC (Ammonia Slip Catalyst)ammonia khiav tawm catalyst, qee lub tsheb thauj khoom 'National VI post-treatment yuav muaj ASC system, uas tau teeb tsa rau ntawm qhov kawg ntawm SCR thiab txo qhov xau ntawm ammonia (NH3) hauv cov pa tawm ntawm SCR qhov kawg los ntawm catalytic oxidation.
6.POCyog ib qho tshuaj catalytic oxidizer particulate. Lub hauv paus ntsiab lus ua haujlwm yog khaws cov particulate matter thiab hlawv nws tawm los ntawm qhov kub siab ntawm cov pa tso pa tawm (250 ℃ -500 ℃) kom ua tiav lub hom phiaj ntawm kev txo cov particulate matter. POC feem ntau siv rau ntawm cov tsheb thauj khoom me me. Tsis tas li ntawd, POC tuaj yeem rov ua dua tshiab, thaum DPF xav tau kev cuam tshuam tes.
Lub sijhawm tshaj tawm: Lub Xya Hli-31-2024