Exhaust Gas Heat Exchanger Rau Biomass Boilers
Piv nrog rau cov pob txha pob txha roj boilers, cov yam ntxwv roj ntawm biomass boilers txiav txim siab qhov tshwj xeeb ntawm lawv cov pa pa kho - biomass fuels muaj cov dej noo thiab cov hmoov tshauv, thiab cov pa roj uas tsim los tom qab combustion muaj ntau cov plua plav, alkali hlau, hnyav hlau, thiab corrosive Cheebtsam, uas tso siab dua cov kev xav tau ntawm corrosion resistance thiab tiv thaiv thaiv cov khoom siv. Cov khoom siv hluav taws xob sib xyaw ua ke feem ntau muaj teeb meem xws li kev hloov pauv hluav taws xob tsawg, qhov yooj yim scaling thiab blockage, thiab lub neej ua haujlwm luv luv, uas tsis tuaj yeem hloov mus rau txoj haujlwm nyuaj ntawm biomass boilers. Lub siab biomass boiler tso pa roj cua kub exchanger tau meej meej daws qhov mob cov ntsiab lus hauv kev lag luam no los ntawm kev tsim cov qauv tsim thiab cov khoom siv kom zoo, ua tiav ob lub hom phiaj ntawm kev ua kom rov qab tau zoo ntawm cov khoom siv hluav taws xob los ntawm cov pa hluav taws xob thiab ntev - lub sij hawm ruaj khov ntawm cov khoom siv, dhau los ua ib qho tseem ceeb hauv kev txhawb nqa cov khoom siv hauv biomass boiler systems.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm tseem ceeb ntawm biomass boiler tso pa roj cua kub exchanger yog raws li cov pa roj los yog cov pa roj -kua siv hluav taws xob sib pauv hluav taws xob, uas ua tiav cov cua sov hloov ntawm siab - kub tso pa roj thiab txias nruab nrab (cua, dej, thiab lwm yam) yam tsis muaj kev sib cuag ncaj qha nrog qhov nruab nrab, thiab ua kom tiav cov kev rov qab thiab rov qab siv cov khoom siv hluav taws xob los ntawm cov pa roj. Qhov kev ua haujlwm tuaj yeem raug suav hais tias yog qhov kaw - voj voog ntawm "khoom siv hluav taws xob hluav taws xob → khib nyiab rov qab → kev siv thib ob": qhov siab -kub khib nyiab roj tsim los ntawm biomass boiler combustion nkag mus rau qhov kub sab ntws channel ntawm cov khib nyiab hluav taws xob los ntawm lub tshuab hluav taws xob, thiab hloov cov cua sov mus rau qhov chaw txias txias ntawm cov cua sov hauv nruab nrab ntawm cov cua sov ntawm cov cua sov. cua txias nkag mus rau hauv lub boiler, ntau lawm circulating dej, thiab lwm yam); Tom qab ua tiav cov cua sov hloov mus, qhov kub ntawm cov pa tso pa yog txo qis mus rau ib ncig ntawm 150 degree, thiab nws raug tso tawm tom qab ua tau raws li ib puag ncig emission; Qhov nruab nrab txias uas nqus cua sov tuaj yeem siv rau boiler combustion cua preheating, cov txheej txheem ntau lawm cua sov, cua sov thiab lwm yam xwm txheej, paub txog kev siv cov khoom siv hluav taws xob pov tseg thiab tsim lub voj voog zoo ntawm "kev txuag hluav taws xob thiab kev txo qis → kev tiv thaiv ib puag ncig thiab emission txo".
Raws li cov yam ntxwv ntawm kev ua haujlwm ntawm biomass boilers, feem ntau siv cov khib nyiab roj kub exchangers hauv kev lag luam feem ntau muab faib ua peb pawg. Txhua yam ntawm cov khoom yog yoog rau biomass boilers ntawm cov nplai sib txawv thiab kev ua haujlwm nrog cov qauv zoo sib txawv, ua tau raws li cov kev xav tau ntawm cov khoom siv hluav taws xob sib txawv.
Phaj hom khib nyiab roj cua kub exchanger yog cov kev daws teeb meem rau cov me thiab nruab nrab -biomass boilers. Nws cov tub ntxhais muaj ntau yam ntawm cov hlau corrugated daim hlau, thiab cov xov xwm txias thiab kub ntws ntawm ob sab ntawm daim hlau, ua kom tau txais txiaj ntsig zoo los ntawm cov phaj nyias. Cov qauv tshwj xeeb ntawm corrugated daim hlau tsim kev quab yuam quab yuam nyob rau hauv cov ndlwg channel, zoo heev txhim kho lub tshav kub hloov coefficient. Kev hloov hluav taws xob hloov hluav taws xob ntau dua li cov khoom siv hluav taws xob ib txwm siv hluav taws xob, nrog rau cov hluav taws xob hloov hluav taws xob ntawm 30-50W / (m ² · K). Cov qauv yog compact, thiab lub ntim yog me me nyob rau hauv tib lub tshav kub hloov efficiency. Cov txheej txheem tiv thaiv cov hmoov tshauv tuaj yeem raug kho raws li kev ua haujlwm kom tau raws li qhov yuav tsum tau ua ntawm cov txheej txheem me me thiab nruab nrab ntawm biomass boilers. Nyob rau tib lub sijhawm, lub phaj hluav taws xob hloov pauv tau txais tus qauv tsim tawm, uas yooj yim rau kev tu thiab tu txhua hnub, thiab tuaj yeem daws tau qhov teeb meem ntawm cov plua plav siab hauv biomass khib nyiab, tsis txhob scaling thiab blockage uas cuam tshuam rau kev ua haujlwm zoo.
Tube hom khib nyiab cua sov exchangers yog tsim nyog rau siab -kub flue gas thiab huab cua ntim scenarios xws li loj biomass boilers thiab biomass fais fab nroj tsuag. Lawv yog tsim los ntawm cov yeeb nkab steel bundles, nrog siab -kub khib nyiab roj ntws tawm sab nraud cov hlab thiab txias nruab nrab ntws hauv cov hlab, ua tiav cov cua kub hloov los ntawm cov phab ntsa hlau. Lub raj cua kub exchanger ua haujlwm ntseeg tau, muaj zog ua haujlwm siab, thiab tuaj yeem hloov mus rau qhov kub thiab txias ntawm biomass boiler tso pa roj. Lub raj ntim cov qauv yog ib qho yooj yim rau nruab nrog cov cuab yeej ntxuav, uas tuaj yeem kho cov plua plav paug siab. Txhawm rau txhim kho kev tiv thaiv corrosion, lub raj ntim ntawm tubular cov khoom siv hluav taws xob feem ntau yog ua los ntawm cov ntaub ntawv xws li 304, 316L stainless hlau, cua sov- cov hlau tsis muaj zog, thiab lwm yam, uas tuaj yeem tiv taus qhov yaig ntawm corrosive Cheebtsam hauv biomass khib nyiab roj thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv.
Nyob rau hauv xyoo tas los no, ob-theem flow gas heat exchangers tau dav siv los ua hom tshiab ntawm cov khoom siv hluav taws xob hloov pauv hauv thaj chaw biomass boilers. Nws txais cov qauv sib cais, muaj cov cua sov nqus qhov kawg thiab qhov kawg tso tawm cua sov, txuas nrog lub kav dej kaw kom tsim tau ib qho kev ncig. Ib qho kev sib pauv cua sov nruab nrab yog txhaj rau hauv, thiab qhov nruab nrab absorbs lub tshav kub ntawm cov pa pa ntawm lub tshav kub absorbing kawg thiab evaporates rau hauv saturated chav. Tom qab nkag mus rau qhov tso cua sov kawg kom tso tawm cov cua sov, nws condenses rau hauv cov kua hauv lub xeev, thiab lub voj voog rov ua kom tiav cov cua sov hloov. Nws lub ntsiab kom zoo dua yog nyob rau hauv lub peev xwm los yeej ib txwm tswj cov phab ntsa kub ntawm lub tshav kub exchanger saum toj no lub dew point kub ntawm lub tso pa roj, raws li zoo raws li tsis txhob qis - kub corrosion thiab scaling blockage teeb meem. Nyob rau tib lub sijhawm, nws ua tiav qhov ntsuas kub thiab kho tau ntawm phab ntsa, uas tuaj yeem hloov mus rau kev ua haujlwm ntawm cov roj biomass sib txawv thiab cov khoom hloov pauv. Nws cov kev pab cuam lub neej ntev dua li cov khoom siv hluav taws xob cov khoom siv hluav taws xob hluav taws xob, thiab cov khoom siv hluav taws xob pov tseg tau ruaj khov ntawm ntau dua 80%.
Daim ntawv thov ntawm biomass boiler tso pa roj cua kub exchangers tau ua tiav peb zaug hauv kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, thiab cov txiaj ntsig kev lag luam, dhau los ua ib qho kev txhawb nqa tseem ceeb rau kev txhawb nqa siab - zoo ntawm biomass zog. Nyob rau hauv cov nqe lus ntawm kev txuag hluav taws xob thiab kev txo qis, los ntawm kev rov qab cov khoom siv hluav taws xob los ntawm cov pa hluav taws xob los ua kom cov cua sov ntawm lub boiler, qhov kev ua kom zoo ntawm lub boiler tuaj yeem txhim kho li ntawm 2% -3% rau txhua txhua 100℃nce hauv huab cua kub. Nyob rau hauv tib lub peev xwm evaporation, cov roj noj yuav raug txo los ntawm 5% -15%, thiab lub sij hawm rov qab peev feem ntau yog nyob nruab nrab ntawm 1-2 xyoos. Tom qab kev txhim kho stainless hlau phaj hom pa roj cua kub exchanger ua ke nrog ib tug sawdust pellet boiler, lub tso pa kub ntawm 320℃mus rau 160 degree, thiab lub inlet cua kub nce mus rau 180 degree. Lub boiler lub thermal efficiency tau nce ze li ntawm 6%, thiab cov roj noj tau txo los ntawm 12%, nrog rau cov txiaj ntsig tseem ceeb ntawm lub zog txuag.
Nyob rau hauv cov nqe lus ntawm kev tiv thaiv ib puag ncig thiab emission txo, cov pa roj cua kub exchangers tuaj yeem txo qhov cua kub ntawm biomass boilers los ntawm saum toj no 300℃mus rau ib ncig ntawm 150 degree, uas tsis tsuas yog txo cov thermal pollution ntawm high - kub flue gas rau cov huab cua, tab sis kuj txo cov tiam ntawm cov pa phem xws li NOx - vim hais tias ntawm ntau cov pa phem xws li NOx combustion. txo qis, pab cov lag luam ua tau raws li ultra- cov qauv qis qis. Nyob rau tib lub sijhawm, qhov txo qis hauv cov pa roj cua kub tuaj yeem txo cov thermal load ntawm cov cua sov thiab cov khoom siv tshem tawm plua plav ntawm tus Tsov tus tw ntawm lub boiler, txuas lub neej kev pab cuam ntawm lub boiler thiab flue system, thiab txo cov khoom siv tu nqi. Tsis tas li ntawd, qhov concentration ntawm plua plav thiab corrosive Cheebtsam nyob rau hauv cov pa khib nyiab tom qab pov tseg thaum tshav kub kub rov qab yog txo, txo cov pa phem nyob rau hauv atmospheric ib puag ncig thiab ua raws li txoj kev loj hlob positioning ntawm huv si thiab tsawg - carbon biomass zog.
Nrog rau kev txhim kho txuas ntxiv ntawm biomass zog kev lag luam thiab cov kev cai ib puag ncig nruj zuj zus, thev naus laus zis iteration ceev ntawm biomass boiler tso pa roj cua kub exchangers txuas ntxiv mus. Nyob rau hauv lub neej yav tom ntej, kev lag luam yuav tsom mus rau peb lub ntsiab lus tseem ceeb: cov khoom siv tshiab, kev txawj ntse txawj ntse, thiab kev sib koom ua ke. Hais txog cov ntaub ntawv, cov ntaub ntawv tshiab xws li nano coatings thiab graphene reinforced composite cov ntaub ntawv yuav raug txhawb kom txo fouling thermal tsis kam, txhim kho cov khoom siv corrosion thiab thermal conductivity, thiab txuas ntxiv rau kev pab cuam lub neej; Nyob rau hauv cov nqe lus ntawm kev txawj ntse tswj, kev koom ua ke cov ntxaib digital thiab AI kwv yees kev siv thev naus laus zis, kev saib xyuas lub sijhawm tiag tiag ntawm cov khoom siv ua haujlwm, ua tiav qhov kev ceeb toom txhaum cai thiab kev saib xyuas meej, txo qis lub sijhawm tsis tau npaj tseg, thiab txo nqi kev ua haujlwm thiab kev saib xyuas; Nyob rau hauv cov nqe lus ntawm kev sib koom ua ke, peb yuav txhawb kev sib txuas ntawm cov pa hluav taws xob sib txuas nrog ORC lub zog tsim hluav taws xob, nqus cov twj siv hluav taws xob thiab lwm yam thev naus laus zis kom ua tiav cov khoom siv hluav taws xob rov qab los ntawm qhov ntsuas kub ntawm 80-600 degree, ua kom muaj txiaj ntsig zoo ntawm kev siv hluav taws xob pov tseg, thiab kev sib koom ua ke nrog denitrification, desulfurization, ntau cov plua plav tshem tawm thiab lwm yam kev kho mob.
Raws li "tus neeg saib xyuas ntawm cov khoom siv hluav taws xob rov qab" rau biomass boilers, cov khoom siv hluav taws xob pov tseg tsis yog tsuas yog daws cov teeb meem kev lag luam ntawm cov khoom siv hluav taws xob pov tseg thiab cov pa phem los ntawm biomass boiler khib nyiab roj, tab sis kuj txhawb kev txhim kho biomass zog ntawm kev ua haujlwm siab, huv, thiab kev txawj ntse. Nrog rau kev tsim kho tshiab ntawm kev siv thev naus laus zis thiab kev nthuav dav ntxiv ntawm daim ntawv thov scenarios, biomass boiler tso pa hluav taws xob hloov pauv yuav ua lub luag haujlwm tseem ceeb hauv kev siv lub zog tauj dua tshiab thiab kev ua tiav ntawm "dual carbon" cov hom phiaj, pab cov tuam txhab ua tiav kev sib koom ua ke ntawm kev txuag hluav taws xob, kev tiv thaiv ib puag ncig, emission txo, thiab cov txiaj ntsig kev lag luam, txhaj muaj zog impetus rau hauv kev lag luam siab {1} kev lag luam zoo.
