Diesel Particulate Filter Regeneration

Diesel particulate filter (DPF) muaj kev pom zoo rau cov hmoov av, uas tuaj yeem ncav cuag 60% txog 90%. Thaum lub sij hawm filtration, particulate teeb meem accumulates nyob rau hauv lub particle filter, uas yuav ua rau lub diesel cav tso rov qab siab mus nce. Thaum cov pa rov qab siab nce mus txog 16 kPa mus rau 20 kPa, qhov kev ua tau zoo ntawm lub cav diesel pib deteriorate. Yog li ntawd, cov khoom yuav tsum tau muab tshem tawm tsis tu ncua kom rov qab cov lim particle mus rau nws lub xeev ua haujlwm qub, uas yog, rov tsim dua tshiab. Qhov kev sib tw loj tshaj plaws uas ntsib DPF yog qhov teeb meem rov tsim dua tshiab. Cov txheej txheem ntawm regenerating particle filter yog feem ntau particle oxidation, thiab cov ntsiab lus ntawm particle oxidation yog kub, oxygen enrichment thiab oxidation lub sij hawm. Qhov tseeb, qhov cua kub ntawm lub tshuab hluav taws xob feem ntau tsawg dua 500 degree, tshwj xeeb tshaj yog cov cua kub ntawm qee lub tsheb npav khiav hauv nroog txawm tias qis dua 300 degree. Qhov teeb meem tseem ceeb ntawm particle filter regeneration yog txo qhov sib npaug ntawm qhov ntsuas kub, thaum qhov ceev ntawm particle tsim thiab oxidation yog sib npaug, lub siab rov qab yog qhov tsis tu ncua, thiab lub kaw lus nyob rau hauv equilibrium. Qhov sib npaug ntawm qhov ntsuas kub yog cuam tshuam nrog tus nqi ntws, particle muaj pes tsawg leeg, NOx cov ntsiab lus, sulfur concentration, soot tsim, thiab cav thiab roj tsis. Cov txheej txheem rov tsim dua tshiab ntawm DPF suav nrog active regeneration thiab passive regeneration. Cov txheej txheem nquag siv rov ua dua tshiab suav nrog kev siv hluav taws xob tua hluav taws xob hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob hluav taws xob, hluav taws xob microwave regeneration thiab infrared cua sov regeneration. Burner heating regeneration yog teem ib lub burner ntawm qhov nkag ntawm cov khoom lim, tshuaj tsuag diesel thiab cov cua nruab nrab, thiab ignite cov hmoov av nyob rau hauv lub particle lim tom qab combustion rau regeneration. Txoj kev no yuav tsum tau muab cov roj ntxiv thiab qhov kub thiab txias tsis tu ncua, yog li yuav tsum muaj cov txheej txheem kev hloov kho tsis siv neeg rau kev kho cov roj thiab cov cua nruab nrab. Tsis tas li ntawd, lub tshuab hluav taws xob no muaj qee qhov kev xav tau rau kev tsav tsheb, xws li tsis nrawm nrawm thaum rov tsim dua tshiab. Yog hais tias lub regeneration yog ceev sharply, lub airflow yuav tua cov regenerated nplaim, thiaj li hais tias cov roj yog tsis hlawv tag, ua rau lub tsheb emit pa luam yeeb dawb. Hluav taws xob cua sov regeneration yog kom sov cov particle lim los ntawm hluav taws xob cua sov los txhawb lub ignition ntawm soot hais. Txawm hais tias txoj kev tsim kho tshiab no yuav tsis ua rau muaj pa taws, hluav taws xob cua sov muaj qhov yuav tsum tau ua rau kev tswj hwm, thiab qhov teeb meem ntawm kev siv hluav taws xob siab yuav tsum tau daws thaum siv tsheb. Nws tsis yog ib qho yooj yim rau me me thiab nruab nrab-lub zog diesel xyaw kom tau raws li qhov xav tau ntawm lub zog. Tsis tas li ntawd, cov cua kub tsis sib xws yuav ua rau cov khoom tsis sib xws ntawm lub cev lim dej, thiab lub cev lim dej ua rau muaj cua sov hauv zos thiab kev puas tsuaj. Microwave cua sov rov tsim dua tshiab siv cov cua sov tshwj xeeb thiab cov cua kub ntawm cov cua sov ntawm cov microwaves los tsim cov cua sov hauv qhov chaw hauv lub cev lim dej, ua kom sov cov hmoov av tso rau ntawm lub cev lim, thiab cua sov thiab ua rau cov kua qaub nyob hauv qhov chaw. Realizing lim lub cev regeneration Microwave cua sov hais txog cua sov ib yam khoom ntawm ib zaus ntawm 300 MHz txog 300 GHz. Nws txawv ntawm cov txheej txheem cua sov. Nws yog lub ntim cua sov los ntawm dielectric poob hauv electromagnetic teb. Nws lub zog yog kis nyob rau hauv daim ntawv ntawm electromagnetic vuag los ntawm qhov chaw los yog nruab nrab. Cov txheej txheem cua sov yog ze ze rau qhov polarization ntawm molecules hauv cov khoom. Cov thev naus laus zis tseem ceeb ntawm microwave cua sov rov tsim dua yog nyob rau hauv yuav ua li cas kom muaj ntau hom kev ua tau zoo hauv cov kab noj hniav resonant thiab tswj qhov kub thiab txias ntawm cov hmoov av hauv cov kab noj hniav kom tsis txhob lim lub cev los ntawm kev puas tsuaj vim kub dhau. Piv nrog rau lwm txoj kev cua sov, infrared hluav taws xob cua sov regeneration muaj cov yam ntxwv ntawm kev xaiv cua sov, tuaj yeem ncaj qha tshav kub lub cev, txo lub sij hawm nws siv rau lub cev rhuab mus rau qhov kub thiab txias, thiab txo lub zog noj; infrared regeneration thev naus laus zis muaj kev tsim kho tshiab; Qhov siab tshaj plaws rov tsim dua tshiab yog tsim nyog, thiab lim lub cev kub gradient me me, uas yog qhov tsim nyog rau kev tsim dua tshiab ntawm honeycomb ceramics. Cov txiaj ntsig zoo ntawm cov hluav taws xob hluav taws xob hluav taws xob hluav taws xob no zoo sib xws nrog nws cov txheej txheem cua sov. Los ntawm qhov kev xav ntawm infrared hluav taws xob cua sov tshuab, thaum lub teeb hluav taws xob wavelength ntawm cov hluav taws xob hluav taws xob zoo ib yam nrog qhov nqus nqus ntawm cov khoom irradiated, tom kawg absorbs ib tug loj npaum li cas ntawm infrared zog, yog li hloov thiab intensifying lub zog ntawm nws cov molecules, ua tiav cov cuam ​​tshuam ntawm cua sov thiab cua sov. Cov txheej txheem kev tsim dua qub qub muaj xws li roj additive catalytic regeneration lim system, CRT (nruam rov tsim dua lim) system thiab CCRT system. Cov roj additive ntawm cov roj additive catalytic regeneration lim system yog ib qho catalyst yaj hauv roj. Tom qab combustion nyob rau hauv lub cav, nws nkag mus rau hauv lub tso pa thiab yog ntes los ntawm lub lim ua ke nrog cov hais, uas ua rau cov hais thiab cov catalytic active Cheebtsam nyob rau hauv kev sib cuag, uas yog sib npaug rau ntxiv ib tug catalyst rau cov hais los txo cov regeneration kub. cov particle. Qhov tsis zoo yog tias cov khoom siv roj ntxiv yuav ua rau tib neeg kev noj qab haus huv thaum nkag mus rau hauv huab cua nrog cov pa tawm ntawm lub tsheb. CRT muaj cov oxidizer (DOC) thiab cov lim dej (DPF tsis muaj catalytic txheej). Thaum cov pa tawm ntawm lub cav diesel dhau los ntawm oxidation catalytic converter, ntawm qhov kub ntawm 200 degree mus rau 600 degree, CO thiab HC yog thawj zaug yuav luag tag oxidized rau hauv CO2 thiab H2O, thiab NO yog hloov mus rau NO2. Tom qab ntawd NO2 yog oxidized los tsim CO2 los ntawm cov khoom hauv cov lim dej, thiab NO2 raug txo kom tsis muaj, yog li ua tiav lub hom phiaj ntawm kev rov tsim dua cov khoom. Nws yuav tsum raug sau tseg tias qhov system no tsuas yog siv tau rau cov tshuab hluav taws xob qis qis, vim tias cov oxidation catalyst tuaj yeem oxidize leej faj thiab ua kom cov khoom ntau ntxiv. Nyob rau tib lub sij hawm, passive regeneration yuav tsum tau ib tug haum tso zis kub. Nws tsis zoo yog tias qhov kub thiab txias siab dhau los yog qis dhau. Yog tias qhov kub thiab txias qis dhau, oxidation tus nqi ntawm NO2 qeeb heev; Yog tias qhov kub thiab txias dhau, qhov decomposition ntawm NO2 yog nrawm thiab tsis txaus NO2 tuaj yeem tsim. Kev tsim kho qhov kub thiab txias ntawm CRT yog 240 degree ~ 450 degree, thiab kev tsim kho tshiab yuav tsum muaj qhov sib piv NOx / PM hauv cov pa kom ntau dua 20: 1. Cov txheej txheem CCRT kuj tseem muaj cov oxidizer (DOC) thiab cov lim dej (DPF), tab sis cov khoom siv lim dej (DPF) ntawm CCRT yog coated nrog cov catalyst, yog li cov NO generated hauv cov oxidizer tuaj yeem tsim NO2 nyob rau hauv. lub lim dej kom oxidize cov khoom seem, kom lub kaw lus tuaj yeem tshem tawm cov teeb meem ntawm cov lim. Qhov kom zoo dua ntawm CCRT system yog tias nws muaj kev so ntau dua rau kev rov tsim dua tshiab, thiab qis qis qis dua thiab qis dua NOx / PM piv rau hauv cov pa tawm tuaj yeem rov tsim dua lub cev.
Txawm li cas los xij, hauv cov txheej txheem rov tsim dua tshiab, tsuas yog cov pa roj carbon deposits hauv DPF raug tshem tawm, thiab cov hmoov tshauv uas tsis muaj cov pa roj carbon deposits tsis tuaj yeem txo thiab decomposed txhua. Cov tshauv no feem ntau yog los ntawm cov khoom hauv lub cav roj thiab roj. Txij li cov tshauv tsis tuaj yeem raug hlawv, qhov ntim zoo ntawm cov lim lim tau raug txo, thiab kev ua haujlwm ntawm cov lim lim yuav deteriorate tom qab qee lub sijhawm. Yog li ntawd, rau cov tsheb diesel nrog DPF, cov roj av qis qis yuav tsum raug xaiv ua ntej thiab DPF yuav tsum tau ntxuav thiab rov tsim dua tshiab kom ntseeg tau tias qhov kev hloov pauv ntawm DPF, txo cov pa phem, ncua lub neej kev pab cuam ntawm DPF, txo cov nqi txij nkawm tom qab, txo lub cav lub zog poob thiab txo cov roj noj. Rau kev tu ib txwm ntawm DPF, koj tuaj yeem xaiv German Liqui Moly DPF thawj cov khoom siv tshuaj ntxuav tes - LM-5169 diesel particle filter cleaner thiab LM-5171 diesel particle filter flushing kua. LM-5169 yog ib qho tshuaj ntxuav tau zoo heev uas tuaj yeem yaj sai sai xws li cov pa roj carbon pa luam yeeb thiab cov hmoov tshauv txuas rau saum npoo ntawm DPF. LM-5171 yog cov kua dej ntws tawm zoo. Thaum siv tom qab siv Liqui Moly Diesel Particle Cleaner, nws tuaj yeem faib cov khoom tawg thaum lub sij hawm ntxuav nyob ib ncig ntawm cov phab ntsa sab hauv ntawm DPF thiab hlawv lawv tawm. Yog li ntawd, kev siv cov khoom no tsis tu ncua tuaj yeem txuas ntxiv lub neej kev pab cuam ntawm DPF, txo tus nqi ntawm kev saib xyuas tom qab thiab hloov pauv, thiab txo qis cov pa phem.