Boiler Energy Recovery Exchanger Txhaj Kub Tiag Tiag thiab Nyiaj Rau Qhov Tsawg -carbon Transformation Ntawm Cement Cog

Lub zog noj ntawm cov cement nroj tsuag feem ntau yog concentrated nyob rau hauv cov txheej txheem clinker calcination, thiab boilers, raws li cov tub ntxhais thermal zog khoom siv nyob rau hauv cov txheej txheem no, feem ntau muaj flue gas emission kub ntawm 180℃thiab 600 degree. Cov pa cua kub ntawm tus Tsov tus tw ntawm qee qhov loj rotary kilns tuaj yeem ncav cuag 900℃txog 1000 degree, uas muaj peev xwm loj heev rau cov khoom siv hluav taws xob pov tseg. Raws li kev txheeb cais, lub zog pov tseg los ntawm kev siv tsis txaus ntawm kev siv hluav taws xob pov tseg hauv Tuam Tshoj txoj kev lag luam tau nce mus txog ntau pua lab tons ntawm cov qauv thee txhua xyoo. Kev ua kom zoo tshaj plaws ntawm cov khoom siv hluav taws xob tuaj yeem txhim kho thermal efficiency ntawm 15% -30%. Rau kev lag luam cement, kev rov qab zoo ntawm cov khib nyiab los ntawm boiler flue roj yog sib npaug rau qhib "thib ob lub zog" channel, uas tuaj yeem txo cov fossil roj noj thiab carbon emissions, ua tiav ob qho kev txhim kho hauv kev lag luam thiab ib puag ncig cov txiaj ntsig.
Lub hauv paus ntawm daim ntawv thov ntawm boiler tshav kub rov qab kub exchangers nyob rau hauv cement nroj tsuag yog kom rov qab cov khib nyiab cua sov los ntawm boiler tso pa roj los ntawm npaum tshav kub exchanger technology, thiab ces hloov mus rau hauv usable thermal los yog hluav taws xob lub zog raws li ntau lawm xav tau kev pab, ua kom tiav lub cascade siv lub zog. Raws li cov txheej txheem tsim khoom ntawm cov cement nroj tsuag, lawv daim ntawv thov scenarios feem ntau tsom rau peb qhov txuas txuas, npog tag nrho cov txheej txheem ntawm cov khoom siv hluav taws xob rov qab thiab hloov mus rau cov khoom siv hluav taws xob pov tseg ntawm cov kub sib txawv.

Nyob rau hauv qhov chaw siab -kub pov tseg thaum tshav kub kub rov qab, boiler tshav kub rov qab kub exchangers yog tsuas yog siv rau kev kho mob ntawm high - kub flue gas ntawm lub kiln tail thiab grate txias qhov hluav taws xob ntawm teb kilns. High-kub khib nyiab roj tso tawm los ntawm lub qhov cub qhov cub ntawm cov cement loj, tom qab kev sib hloov cua sov hauv cov khoom siv hluav taws xob, tuaj yeem txo qhov kub ntawm ntau tshaj 600℃mus rau qis dua 200 degree, ua tau raws li qhov yuav tsum tau ua ntawm cov khoom siv tom qab baghouse plua plav sau cov tshuab thaum rov qab tau ntau cov khoom siv hluav taws xob zoo. Qhov rov qab siab dua -kub khib nyiab tuaj yeem siv los tsav lub tshuab hluav taws xob rau kev tsim hluav taws xob. Piv txwv li, Lucky Cement hauv Pakistan, los ntawm kev hloov kho nws lub cav fais fab nroj tsuag, tau txais ib qho system uas muaj 11 siab -kev ua haujlwm pov tseg thaum tshav kub kub rov qab boilers, rov qab tau tag nrho 27 MWh ntawm cov hluav taws xob pov tseg, uas tuaj yeem tsim hluav taws xob 6 MWh, nce cov nroj tsuag lub zog tawm los ntawm kwv yees li 10% thiab txo qis roj noj thiab emissions. Nyob rau hauv Suav teb, Henan Mengdian Group tau nruab nws cov clinker ntau lawm kab nrog cov khib nyiab kub boilers, rov qab cov khib nyiab cua sov los ntawm lub taub hau thiab tus Tsov tus tw rau lub hwj chim tsim, thiab ntxiv rov qab qhov qis -kub khib nyiab kub tom qab lub zog tsim hluav taws xob rau vaj tse cua sov tej yaam num, ua tau zoo cascade siv cov khib nyiab cua sov.

Tsawg- thiab nruab nrab-kub pov tseg thaum tshav kub kub rov qab yog lwm qhov tseem ceeb ntawm daim ntawv thov scenario rau boiler heat recovery heat exchangers, feem ntau yog tsom rau qhov qis - thiab nruab nrab- kub flue gas emissions los ntawm ntau yam khoom pab nyob rau hauv cement ntau lawm. Piv txwv li, 200-300℃khib nyiab roj tawm los ntawm qhov qis- qhov kub thiab txias ntawm lub qhov cub cua txias tuaj yeem tsim kom muaj -siab chav cua tom qab khib nyiab rov qab los ntawm lub tshav kub exchanger. Cov chav no tuaj yeem siv rau cov txheej txheem dej ntxiv, cov neeg ua haujlwm hauv cov dej hauv tsev, lossis ua qhov cua sov rau lithium bromide chillers kom txias lub rooj cob qhia thiab chaw nyob. Qhov nruab nrab-kub flue roj los ntawm lub qhov cub hluav taws xob ntawm cov cement me me tuaj yeem tsim kom tsawg -siab chav ntawm 0.3-0.8MPa tom qab kev kho los ntawm lub tshav kub exchanger, ua tau raws li cov cua sov xav tau ntawm me me - teev cov txheej txheem ntau lawm. Tsis tas li ntawd, qee cov nroj tsuag cement kuj siv cov khoom siv rov qab qis dua - thiab nruab nrab-kub khib nyiab rau cov khoom siv raw kom qhuav. Tom qab siv lub tshuab hluav taws xob hluav taws xob hluav taws xob rov qab hluav taws xob, ib tsob ntoo cement txo cov pa roj cua kub ntawm 220℃mus rau 90 degree, txo lub zog siv ib tuj ntawm cov cement los ntawm 8%, thiab txuag ntau tshaj li ib lab yuan hauv cov nqi txhua xyoo, ua kom pom lub zog txuag hluav taws xob.

Tshaj li kev rov ua kom sov ncaj qha thiab rov siv dua, boiler cua sov rov qab cov khoom siv hluav taws xob tuaj yeem ua ke nrog cov cement nroj tsuag 'cov khoom siv hluav taws xob qis-kub khib nyiab hluav taws xob tsim hluav taws xob los tsim lub kaw- lub voj voog hluav taws xob ntawm "khoom siv hluav taws xob rov qab- tsim hluav taws xob- tsim khoom." Tam sim no, kev tsim hluav taws xob hluav taws xob pov tseg tau dhau los ua qhov tseem ceeb rau cov tuam txhab cement kom txuag hluav taws xob thiab txo qis emissions. Raws li lub hauv paus tseem ceeb ntawm cov khoom siv hluav taws xob hluav taws xob pov tseg, lub rhaub dej kub rov qab ua kom sov yog lub luag haujlwm rau hloov cov roj hluav taws xob hluav taws xob mus rau hauv chav kom tsav lub tshuab hluav taws xob rau hluav taws xob. Cov ntaub ntawv kev lag luam qhia tau hais tias Wannianqing Cement hauv Suav teb tau muab 10 cov khoom siv hluav taws xob hluav taws xob pov tseg rau hauv kev ua haujlwm, nrog lub peev xwm ntawm 80.30MW. Kev siv hluav taws xob hluav taws xob pov tseg tuaj yeem ua tau raws li kwv yees li 50% ntawm lub tuam txhab qhov cub hluav taws xob qhov kev thov hluav taws xob. Xyoo 2024, Shangfeng Cement tau siv cov khib nyiab pov tseg los tsim 473 lab kilowatt- teev hluav taws xob, txo cov pa roj carbon dioxide emissions los ntawm 389,800 tons. Qhov no tsis tsuas yog txo qis lub tuam txhab cov nqi hluav taws xob tab sis kuj txhim kho nws cov kev sib tw ntsuab, dhau los ua qhov txiaj ntsig zoo rau cov tuam txhab qis qis "ntsuab kev yuav khoom" thiab ESG kev ntaus nqi. Anhui Conch Kawasaki tau xa tawm 302 cement khib nyiab hluav taws xob tsim hluav taws xob thoob ntiaj teb, tsim hluav taws xob 26.63 billion kWh ib xyoos ib zaug. Xam siv tib cov qauv raws li kev tsim hluav taws xob thermal, qhov no txhais tau tias txhua xyoo kev txuag ntawm 9.587 lab tons ntawm cov qauv thee thiab txo qis ntawm 24.582 lab tons ntawm cov pa roj carbon dioxide emissions, ua kom pom qhov muaj txiaj ntsig zoo ntawm cov khoom siv hluav taws xob rov qab.

Piv nrog rau cov txheej txheem pov tseg thaum tshav kub kub rov qab, boiler heat recovery heat exchangers muab cov cuab yeej zoo thiab hloov tau hauv cov nroj tsuag cement. Cement cog flue gas muaj ib tug complex muaj pes tsawg leeg, muaj cov hmoov av ntau, SO₂, NOx, thiab lwm yam khoom, yooj yim ua rau cov khoom siv corrosion, tshauv tsub zuj zuj, thiab hnav. Dedicated boiler tshav kub rov qab kub exchangers, siv corrosion-cov ntaub ntawv alloy resistant thiab composite txheej tshuab, muab ntau tshaj peb npaug rau corrosion kuj, ua rau lawv tiv taus hnyav flue gas ib puag ncig uas muaj leej faj thiab plua plav, nrog ib tug kev pab cuam lub neej tshaj 10 xyoo. Lub caij no, lub tshuab hluav taws xob hloov hluav taws xob tau txais kev ua haujlwm siab - kev tsim hluav taws xob hloov hluav taws xob. Los ntawm kev ua kom zoo ntawm cov qauv dej ntws thiab cov fin tsis, cov cua sov hloov coefficient yog nce los ntawm 20% -40%, thiab cov cua kub hloov coefficient ntawm qee cov yeeb nkab kub exchangers tuaj yeem ncav cuag 1500-3000 W / (m²·K). Nws kuj tseem muaj kev ua haujlwm zoo isothermal, tsis tshua muaj plua plav, thiab kev saib xyuas yooj yim. Qhov tsis ua haujlwm ntawm ib lub yeeb nkab cua sov yuav tsis cuam tshuam rau kev ua haujlwm tag nrho, txhim kho kev ruaj ntseg thiab kev ntseeg siab ntawm cov khoom siv. Tsis tas li ntawd, tus qauv tsim qauv tso cai rau nws hloov tau yooj yim raws li qhov tsim cov nplai thiab cov pa roj tsis zoo ntawm cov cement cog, nrog rau lub voj voog luv luv. Nws yog adaptable rau cement ntau lawm kab uas muaj peev xwm sib txawv, enabling meej pov tseg tshav kub rov qab rau ob qho tib si loj clinker ntau lawm kab thiab me me cement nroj tsuag.

Hauv kev siv cov tswv yim, kev siv boiler cua sov rov qab cov khoom siv hluav taws xob tau ua rau muaj kev lag luam, ib puag ncig, thiab kev sib raug zoo rau cov nroj tsuag cement. Kev lag luam, kev siv hluav taws xob pov tseg ncaj qha txo qis kev siv hluav taws xob xws li thee thiab hluav taws xob, txo cov nqi tsim khoom. Lub sij hawm them nyiaj rov qab yog feem ntau 3-10 xyoo, thiab rau qee qhov kev ua haujlwm tau zoo, nws tuaj yeem luv luv kom tsawg dua 1.5 xyoo. Piv txwv li, 10-tuj/teev chav boiler nruab nrog ib tug economizer (ib tug yooj yim tshav kub rov qab heat exchanger) yuav txuag tau li ntawm 200 tons ntawm txheem thee txhua xyoo, ncaj qha txo nqi khiav hauj lwm ntau tshaj 300,000 yuan. Txoj haujlwm pov tseg hluav taws xob rov qab los ntawm Lucky Cement hauv Pakistan tsis yog tsuas yog nce hluav taws xob tawm xwb tab sis kuj ua tiav cov txiaj ntsig sai ntawm kev nqis peev, ua rau lub tuam txhab txuas ntxiv nthuav kev koom tes thiab txhim kho cov khoom siv hluav taws xob zoo sib xws ntawm lwm cov nroj tsuag. Ib puag ncig, pov tseg cov cua sov rov qab txo qhov kev sib tsoo ntawm cov fossil fuels, yog li txo qis emissions ntawm cov pa phem xws li carbon dioxide thiab sulfur dioxide, pab cov tuam txhab cement ua tiav ultra- qis emission retrofits, ua raws li lub teb chaws "dual-carbon" tswv yim. Hais txog cov txiaj ntsig ntawm kev sib raug zoo, qhov kev pib no txhawb kev hloov pauv ntawm kev lag luam cement los ntawm "kev siv hluav taws xob siab thiab kev tso tawm siab" mus rau "ntsuab ntsuab, qis-carbon, thiab txuag hluav taws xob," txhim kho tag nrho cov kev loj hlob ntsuab ntawm kev lag luam thiab muab cov txiaj ntsig zoo rau kev lag luam pov tseg thaum tshav kub kub rov qab.

Tam sim no, nrog rau kev sib sib zog nqus ntawm kev lag luam cement kev hloov pauv ntsuab, daim ntawv thov ntawm boiler tshav kub rov qab cov cua kub exchangers ntsib cov cib fim tshiab thiab cov teeb meem. Ntawm qhov tod tes, lub teb chaws yuav tsum muaj kev txuag hluav taws xob thiab txo cov pa roj carbon monoxide hauv kev lag luam cement yog nce ntxiv. Tsav los ntawm cov cai xws li ultra- qis emission retrofitting thiab ntsuab Hoobkas tsim, cov tuam txhab cement 'kev thov rau cov khoom siv hluav taws xob rov qab tau nce ntxiv, muab qhov chaw txaus rau kev hloov kho thev naus laus zis thiab kev lag luam nce qib ntawm boiler cua sov rov qab cua sov exchangers. Ntawm qhov tod tes, flue gas tej yam kev mob nyob rau hauv cov cement nroj tsuag yog complex thiab sib txawv, nrog rau qhov sib txawv ntawm flue gas kub, plua plav cov ntsiab lus, thiab corrosivity ntawm ntau lawm kab. Qhov no ua rau muaj kev xav tau ntau dua ntawm kev hloov pauv hluav taws xob, kev tiv thaiv corrosion, thiab hnav tsis kam ntawm cov khoom siv hluav taws xob, xav kom cov tuam txhab nce peev hauv kev tshawb fawb thiab kev loj hlob, txhim kho cov qauv khoom, thiab txhim kho kev hloov pauv thiab kev ua haujlwm ntawm cov khoom siv.

Nyob rau hauv lub neej yav tom ntej, nrog nruam innovation nyob rau hauv lub tshav kub exchanger technology, boiler tshav kub rov qab cov cua kub exchangers yuav txhim kho mus rau ntau dua efficiency, txawj ntse, thiab ntau haiv neeg. Ntawm ib sab, lawv yuav ua kom zoo dua cov txheej txheem hloov hluav taws xob ntxiv, txhim kho cov khoom siv hluav taws xob pov tseg, ua kom rov qab sib sib zog nqus ntawm qis- qib hluav taws xob pov tseg, thiab ua kom muaj peev xwm ntawm cov hluav taws kub pov tseg hauv kev tsim cov cement. Ntawm qhov tod tes, lawv yuav ua ke nrog cov thev naus laus zis ntse kom ua tiav - lub sijhawm saib xyuas, ceeb toom ua txhaum, thiab kev tswj xyuas kev ua haujlwm ntawm cov khoom siv hluav taws xob, txo cov nqi tu cov cuab yeej thiab txhim kho kev ua haujlwm ruaj khov. Nyob rau tib lub sijhawm, nrog kev sib sib zog nqus ntawm cov khoom siv hluav taws xob rov qab thiab cov txheej txheem tsim cov cement, yuav tsim kom muaj zog rov ua dua tshiab, txhawb kev lag luam cement kom ua tiav nws cov hom phiaj "carbon peak thiab carbon neutrality".

Nyob rau hauv cov ntsiab lus, boiler kub rov qab kub exchangers, raws li cov cuab yeej tseem ceeb rau kev txuag hluav taws xob thiab txo cov pa roj carbon tsawg hauv kev lag luam cement, tuaj yeem tsis tsuas zoo rov qab cov khoom siv hluav taws xob los ntawm boiler flue roj thiab txo cov nqi tsim khoom lag luam, tab sis kuj txo cov pa phem thiab ua rau kev lag luam hloov pauv ntsuab. Tawm tsam keeb kwm yav dhau los ntawm - qhov tob ntawm kev siv "dual-carbon" lub tswv yim, cov tuam txhab cement yuav tsum muab qhov tseem ceeb rau kev txhawb nqa thiab kev siv cov boiler kub rov qab cov cua kub exchangers, xaiv cov khoom siv hluav taws xob uas tsim nyog thiab cov kev daws teeb meem raws li lawv tus kheej cov txheej txheem tsim khoom kom paub txog tus nqi ntawm cov khoom siv hluav taws xob rov qab. Nyob rau tib lub sijhawm, cov tuam txhab cuam tshuam yuav tsum nce peev hauv kev tshawb fawb thiab kev tsim kho thev naus laus zis, txhawb kev tsim kho tshiab thiab hloov kho cov thev naus laus zis thev naus laus zis, muab kev txhawb zog ntxiv rau ntsuab thiab qis - carbon kev loj hlob ntawm kev lag luam cement, thiab ua kom muaj kev sib npaug ntawm kev lag luam, ib puag ncig thiab kev sib raug zoo.