Nyob rau hauv lub tshav pob ntawm flue gas denitration, Guangdong GRVNES Environmental Protection Technology Co., Ltd. tau tsim 3 + 1 txheej thiab ntxiv ib txheej ntawm ammonia khiav tawm catalyst los daws qhov tshwm sim ntawm ammonia khiav tawm thaum qee cov ammonia tau txau, kom dhau. sprayed ammonia tuaj yeem tso tawm rau hauv huab cua tom qab cov tshuaj tiv thaiv tom qab ua haujlwm.
Kev kho ntawm denitration ammonia khiav tawm ntawm GRVNES flue roj ib txhij kev kho mob ntawm denitration ammonia khiav nrog ASC ammonia khiav catalyst
TtshuabRua oadmap
Raws li qhov yuav tsum tau ua ntawm qhov project thiab qhov tseeb emission teeb meem, Green Valley kev tiv thaiv ib puag ncig tau txiav txim siab txoj hauv kev ntawm "SCR + ASC" kom ua tau raws li qhov yuav tsum tau ua ntawm qhov project.Txoj kev technical ntawm qhov project yog qhia hauv daim duab hauv qab no:
SCR + ASC
SCR + ASC Technology Roadmap
Tus nqi ntawm kev ntxiv nitrogen tebchaw (NOx) rau lub cav tsis tu ncua tuaj yeem raug txo los ntawm ntau dua 90% los ntawm kev siv tshuab catalytic, thiab tus nqi zoo ntawm nitrogen tebchaw (NOx) tuaj yeem raug txo los ntawm ntau dua 5% los ntawm kev siv tshuab catalytic. .Thiab lub siab rov qab yog qhov tsawg, thiab yuav luag tsis muaj qhov nce siab hauv cov txheej txheem ntawm kev siv.
Daim Ntawv Qhia Txog Kev Ua Haujlwm ntawm SCR Catalys
Daim Ntawv Qhia Txog Kev Ua Haujlwm ntawm SCR Catalys
Txoj Cai Ua Haujlwm ntawm ASC Ammonia Escape Catalyst:
ASC oxidation catalyst yog tsim los ntawm cov cab kuj thiab catalytic txheej.Nws yog lub tshuab hluav taws xob siv hluav taws xob ua kom huv si.Lub hom phiaj tseem ceeb ntawm cov cuab yeej yog oxidize ntau tshaj NH3 nyob rau hauv lub diesel pa system nrog O2 los tsim cov pa phem N2 thiab dej tawm ntawm lub cav, thiaj li kom paub qhov huv si emission ntawm diesel pa.Nws tuaj yeem siv ua ke nrog diesel particle catcher thiab denitration purification catalyst.
Ignition Kub
Ntawd yog, qhov kub ntawm qhov catalyst nce mus txog 50% kev hloov dua siab tshiab.Lub ignition kub ntawm ASC ammonia khiav catalyst yog 250 ℃.Yuav kom ua tiav kev hloov dua siab tshiab, qhov tso cua sov ntawm lub cav yuav tsum siab dua.
Daim ntawv ntim khoom
Nws tuaj yeem raug coated nyias lossis sib tshooj nrog SCR, uas tuaj yeem ua tau raws li cov kev xav tau ntawm kev pabcuam kev ua haujlwm.
Emission Standard:
Ammonia khiav tawm tus nqi ≤ 3ppm
NOx emission txo vs ammonia cov pa phem hauv kev lag luam cement
Vim tias kev tshawb fawb txog kev tua hluav taws ntawm cov cement kiln tseem nyob rau hauv lub xeev uas nws kim heev, tseem muaj ntau qhov tsis txaus ntawm kev ua haujlwm hauv cov kiln thiab cov txheej txheem tsim cov nitrogen oxides hauv kev lag luam hauv tsev.Muaj ntau qhov chaw ntawm nitrogen oxides thiab ntau yam cuam tshuam.Nyob rau hauv lub tshav pob ntawm nitrogen oxide emission txo technology, lub ntsiab technologies uas twb muaj lawm muaj xws li SCR, SNCR, staged combustion thiab thiaj li nyob.
SCR xaiv catalytic txo technology yog lub ntsiab denitration technology nyob rau hauv lub ntiaj teb no.Nrog ammonia los yog urea ua tus neeg sawv cev denitration thiab catalytic selective absorption nyob rau hauv qhov kev txiav txim ntawm catalyst nyob rau hauv lub absorption ntauwd, tus denitration tus nqi yuav ncav cuag ntau tshaj 90%.
SNCR thev naus laus zis siv qhov chaw ntsuas kub uas tsim nyog (900 ℃ ~ 1100 ℃) hauv qhov cub tawg kom txhaj tshuaj ammonia sib tov rau hauv nws.Ntawm qhov kub no, ammonia (NH3) reacts nrog NOx nyob rau hauv flue gas los tsim N2 thiab H2O.Tus nqi denitration feem ntau yog 40% - 60%, kev noj ammonia loj, thiab kev khiav tawm ntawm NH3 yog siab, uas tuaj yeem ntau dua 3 npaug ntawm SCR.
Tam sim no, cov tuam txhab cement hauv tsev tau ua tiav kev tsim kho ntawm SNCR denitration.Cov thev naus laus zis no siv ntau cov ammonia ua NOx txo tus neeg sawv cev.Ammonia yog ib qho yooj yim kom xau nyob rau hauv cov txheej txheem ntawm kev tsim khoom, kev thauj mus los, kev cia khoom thiab siv, ua rau muaj kuab paug loj rau cov huab cua puag ncig.
Yog li ntawd, kev lag luam cement tam sim no tau ntsib teeb meem tsis sib xws.Kev siv ammonia denitration tuaj yeem txo qis nitrogen oxide emissions, tab sis qhov teeb meem ntawm "ammonia khiav" yog qhov nyuaj los daws.Tsis tas li ntawd, kev tsim cov ammonia nws tus kheej yog cov txheej txheem ntawm kev siv hluav taws xob siab thiab muaj kuab paug siab, thiab kev thauj mus los, kev cia thiab siv yuav ua rau "kev khiav tawm ammonia".
Raws li cov teeb meem zoo li no, cov tuam txhab cement yuav tsum ntxiv dag zog rau kev tswj hwm kev thauj mus los ntawm ammonia thiab khaws cia, txhim kho kev siv ammonia thiab txo "kev khiav tawm ammonia".
Qhov twg Ammonia yuav khiav tawm?
Raws li qhov xwm txheej tiv thaiv ib puag ncig tam sim no, txo cov pa phem emissions ntawm cov tuam txhab cement yog qhov yuav tsum tau muaj ntawm ib puag ncig sab nraud;Nyob rau tib lub sijhawm, nrog rau iteration ntawm cement kev lag luam thev naus laus zis, kev siv hluav taws xob qis dua thiab cov qauv emissions kuj yog qhov kev hloov pauv tsis tu ncua ntawm kev lag luam kho dua tshiab.
Rau cov tuam txhab cement, los ntawm kev pom kev lag luam, tus nqi hloov pauv ntawm SCR thev naus laus zis ib leeg yuav tsum muaj ntau dua 30 lab.Tsis tas li ntawd, tus nqi ntawm catalyst yog ntau dua li ntawm "SNCR + qhov kev kho mob".Thib ob, nyob rau hauv lub hauv paus ntawm tsis tshua muaj nitrogen combustion thiab staged combustion, ua ke nrog SNCR, qee lub lag luam tuaj yeem ua tau raws li NOx emission qauv tam sim no nyob rau hauv qhov chaw ruaj khov.
Raws li cov laj thawj saum toj no, tam sim no, ntau lub tuam txhab cement hauv tsev xaiv txoj hauv kev "SNCR + qhov kev kho mob" kom ua tau raws li qhov yuav tsum tau ua ntawm kev txo qis ammonia oxide emission, tab sis qhov tshwm sim tsis zoo yog qhov teeb meem ntawm ammonia khiav tawm tuaj yeem ua rau hnyav dua.
Post lub sij hawm: May-07-2022