Kev teeb tsa ntawm bypass flue tam sim no yog ib qho teeb meem kub hauv kev lag luam flue roj desulfurization hauv Suav teb. Kev tshawb fawb Feasibility tau ua los txhawm rau tshem tawm cov kab mob hla dhau. "Kev ntsuas rau kev tswj hwm tus nqi hluav taws xob thiab kev ua haujlwm ntawm Desulfurization Facilities rau Coal fired Power Generation Units (Tsim)" muab los ntawm National Development thiab Reform Commission tau hais tias nws raug txhawb kom tsis txhob teeb tsa bypass flues thaum tsim desulfurization chaw tshiab ( nthuav tawm) coal-fired power units. Txawm li cas los xij, feem ntau ntawm cov desulfurization units tam sim no nyob rau hauv kev ua haujlwm thiab tab tom tsim kho hauv peb lub teb chaws tau nruab nrog cov kab hluav taws xob bypass, thiab feem ntau ntawm cov chaw khiav hauj lwm kuj tau txais kev ua haujlwm ntawm kev qhib lub bypass. Xav txog qhov xwm txheej tiag tiag ntawm txoj haujlwm desulfurization, cov xwm txheej rau kev tshem tawm cov txheej txheem bypass ntawm desulfurization units uas tau muab tso rau hauv kev ua haujlwm thiab tab tom tsim kho tseem tsis tau paub tab. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum kawm txog kev ua haujlwm ntawm lub bypass system kom ntseeg tau tias kev tiv thaiv ib puag ncig ntawm cov khoom siv desulfurization thiab kev nyab xeeb thiab ruaj khov ntawm cov khoom siv desulfurization thiab lub tshuab hluav taws xob.
Qhov zoo thiab qhov tsis zoo ntawm bypass qhib kev ua haujlwm hom
Rau cov khoom siv desulfurization nrog bypass flues thiab baffles, cov qauv tsim baffle lub xeev tom qab FGD tau muab tso rau hauv kev ua haujlwm yog: tag nrho qhib inlet thiab qhov hluav taws xob baffles, thiab kaw bypass baffles. Tab sis rau cov tshuab nruab nrog cov kiv cua txhawb nqa, txoj haujlwm ua haujlwm ntawm kev qhib lub bypass baffle kuj tuaj yeem raug saws, uas yog, qhov nkag thiab qhov hluav taws xob ntawm lub kaw lus thiab lub bypass baffle yog txhua yam qhib. Rau qee qhov desulfurization units, hom kev ua haujlwm no tuaj yeem ua tiav cov txiaj ntsig zoo tshaj plaws desulfurization los ntawm kev kho cov kiv cua kom tsim nyog. Piv txwv li, nyob rau hauv ib chav tsev 300MW, desulfurization tus nqi ntawm flue gas system ntawm lub desulfurization ntaus ntawv tseem muaj peev xwm mus txog 95.47% nrog lub bypass baffle qhib, thiab tsis muaj qhov teeb meem ntawm huv flue gas reflux.
1.1 Qhov zoo ntawm kev khiav hauj lwm hom nrog bypass baffle qhib
(1) Txhim kho kev nyab xeeb ntawm kev ua haujlwm ntawm lub tshuab hluav taws xob teeb thiab desulfurization ntaus ntawv. Txawm hais tias lub viav vias baffle tau dhau los ua ntau qhov kev sim qhib ceev thaum lub sijhawm ua haujlwm ntawm desulfurization system, kev sib tsoo tshwm sim vim muaj ntau yam uas tiv thaiv lub bypass baffle los ntawm kev ua haujlwm kom zoo thaum lub sijhawm ua haujlwm ntev ntawm desulfurization system. Yog hais tias tus kiv cua ntawm lub desulfurization system mus ncig ua si thiab lub viav vias baffle tsis tuaj yeem qhib, nws yuav ua rau muaj kev cuam tshuam rau boiler MFT; Yog tias tag nrho cov twj tso kua mis ncig mus ncig thiab lub bypass baffle tsis tuaj yeem qhib, nws yuav ua rau cov khoom siv desulfurization puas tsuaj. Ib qho kev cog hluav taws xob ib zaug tau raug kev puas tsuaj rau nws cov defogger vim lub bypass baffle tsis tau qhib tom qab lub twj tso kua mis ntawm cov khoom siv desulfurization tripped, ua rau kub flue roj nkag mus rau FGD system. Yog tias qhov kev ua haujlwm ntawm kev qhib lub bypass baffle tau txais yuav, qhov hluav taws xob hluav taws xob channel tuaj yeem nyob twj ywm tsis muaj kev cuam tshuam, thiab tsis muaj qhov tshwm sim ntawm cov xwm txheej saum toj no tshwm sim, zoo heev txhim kho kev nyab xeeb ntawm chav tsev thiab desulfurization ntaus ntawv.
(2) Txhim kho lub adaptability thiab adjustability ntawm lub system. Tam sim no, kev ruaj ntseg ntawm cov roj hauv thermal fais fab nroj tsuag hauv Suav teb feem ntau tsis zoo, thiab qhov tsis zoo ntawm cov tshuaj tsuag ntauwd desulfurization ntaus ntawv hauv Suav teb yog nws qhov tsis zoo rau roj. Thaum cov ntsiab lus SO2 nyob rau hauv cov roj flue yog siab dua li tus nqi tsim, tus nqi desulfurization ntawm cov tshuaj tsuag ntauwd FGD system txo qis, thiab pH tus nqi ntawm lub nqus ntauwd feem ntau txo qis thiab nyuaj rau kev ruaj ntseg; Thaum cov ntsiab lus SO2 nyob rau hauv cov roj flue qis dua tus nqi tsim, lub zog noj ntawm cov tshuaj tsuag ntauwd FGD system tseem siab. Yog tias lub viav vias baffle qhib, qhov tso pa tawm tuaj yeem hloov kho kom haum rau cov roj los ntawm kev kho cov zis ntawm cov kiv cua txhawb
1.2 Qhov tsis zoo thiab kev hloov pauv hauv kev ua haujlwm ntawm kev qhib lub bypass baffle.
(1) Tsis yog txhua yam khoom siv desulfurization tsim nyog rau kev ua haujlwm ntawm kev qhib lub bypass baffle. Qhov yuav tsum tau ua ua ntej rau kev siv lub bypass baffle qhib kev ua haujlwm hom yog tias cov roj flue qub tuaj yeem nkag mus rau hauv qhov system desulfurization los ntawm cov kiv cua txhawb nqa thiab yuav tsis muaj qhov huv huv flue gas reflux. Los ntawm kev xyaum ua haujlwm, tsis yog txhua yam khoom siv desulfurization ua tau raws li qhov xwm txheej no. Qee cov khoom siv desulfurization tej zaum yuav muaj ib feem huv huv flue gas reflux tab sis tseem muaj qee cov roj flue uas tau tawm ntawm qhov hla. Kev ua haujlwm ntawm FGD system nyob rau hauv 600MW chav tsev ua piv txwv, thaum lub viav vias baffle qhib thiab qhib lub kiv cua ntawm lub zog tseem tsis hloov pauv, lub qhov hluav taws xob hluav taws xob qhov hluav taws xob kub poob los ntawm 126.9 degree mus rau 122.2 degree, thiab rov qab los ntawm kev huv. flue gas nce mus txog 8%. Nyob rau tib lub sijhawm, qhov loj ntawm SO2 nyob rau hauv lub chimney yog nce los ntawm 13mg / m3 nce mus rau 64.2mg / m3, uas txhais tau hais tias kwv yees li 8% ntawm cov roj flue ncaj qha nkag mus rau hauv lub chimney. Nyob rau ntawm lub sijhawm no, yog tias tus thawj flue roj yuav tsum tau nkag mus rau hauv lub desulfurization system, qhov kev daws teeb meem nkaus xwb yog txhawm rau ntxiv cov khoom tawm ntawm lub kiv cua, uas yuav ua rau cov roj flue ntau dua; Txhawm rau kom tsis txhob thim rov qab ntawm cov roj flue huv, nws tsuas yog nyob ntawm qhov tso tawm ntawm cov kiv cua me me, uas yuav ua rau kom cov pa tawm ntawm cov roj flue. Hauv 300MW desulfurization chav tsev, muaj qhov xwm txheej uas tsawg dua 50% ntawm cov pa hluav taws xob nkag mus rau hauv qhov system desulfurization twb tau ntws rov qab nrog cov pa roj huv huv. Txawm hais tias yuav muaj qhov xwm txheej uas qhov huv huv flue gas reflux thiab raw flue gas direct tso tawm coexist, nrog rau tus nqi ntawm reflux thiab tso tawm ncaj qha, nyob ntawm lub layout ntawm chav tsev thiab desulfurization ntaus flue gas system thiab yuav tsum tau txiav txim raws li. nyob rau ntawm qhov tseeb xam.
(2) Cov kev xav tau siab dua tau muab tso rau pem hauv ntej rau kev ua haujlwm thiab kev tswj hwm ntawm cov kiv cua txhawb nqa. Kev ua haujlwm hom ntawm desulfurization ntaus ntawv nrog bypass qhib yuav tsum tau kho cov zis ntawm cov kiv cua txhawb kom tsim nyog. Yog hais tias tus kiv cua tso zis tsawg dhau, ib feem ntawm cov pa roj flue yuav ncaj qha nkag mus rau hauv lub chimney los ntawm lub bypass flue, yog li txo tus nqi desulfurization ntawm lub system. Tab sis qhov tso zis ntawm lub kiv cua tuaj yeem tsis tuaj yeem loj dhau, txwv tsis pub cov pa roj huv huv yuav ntws rov qab. Tsis zoo li kev khiav hauj lwm nrog lub bypass kaw, lub sij hawm no, tsis tsuas yog lub hwj chim noj ntawm lub booster kiv cua nce, tab sis kuj tso zis ntawm boiler induced cua ntsawj ntshab kiv cua yuav tsum tau nce ntxiv kom tswj qhov tsis zoo siab tshuav nyiaj li cas ntawm lub cub tawg. Yog li ntawd, lub zog noj ntawm induced cua ntsawj ntshab ntxuam kuj yuav nce. Nyob rau tib lub sijhawm, yog tias cov roj flue ntws rov qab ntau dhau lawm, nws kuj tseem tuaj yeem ua rau corrosion ntawm lub booster thiab thawj flue gas duct.
(3) Qee lub tshuab hluav taws xob tau txo qhov tso tawm ntawm lawv cov kiv cua txhawb nqa, ua rau muaj qhov txo qis ntawm cov desulfurization hauv lub cev. Vim tsis muaj kev saib xyuas tsis txaus ntawm cov pa paug tawm los ntawm cov chaw tsim hluav taws xob thermal hauv qee thaj tsam, qee qhov chaw tsim hluav taws xob tau txo qis cov zis ntawm cov kiv cua thaum ua haujlwm nrog bypass baffles qhib, ua rau txo qis hauv qhov system desulfurization muaj peev xwm. Qhov no kuj yog qhov laj thawj tseem ceeb vim li cas cov koom haum cuam tshuam tau txiav txim siab tshem tawm cov kab bypass flue ntawm desulfurization ntaus ntawv.
