Boiler Thaum tshav kub kub rov qab Thaum tshav kub kub Exchanger Empowers zog txuag thiab carbon txo nyob rau hauv cov hlau kev lag luam
Core positioning: Tus nqi tseem ceeb ntawm boiler kub rov qab kub exchangers
Kev tsim cov hlau tsis tuaj yeem raug cais tawm los ntawm kev txhawb nqa ntawm ntau hom boilers xws li blast furnace kub blast qhov cub, roj hluav taws xob tsim boilers, sintering nplhaib coolers, coke ncu, thiab lwm yam. Cov khoom siv no tsim kom muaj ntau cov khib nyiab kub ntawm qhov kub sib txawv thaum ua haujlwm - los ntawm nruab nrab thiab qis kub flue gas ntawm 100℃mus rau kub kub flue roj ntawm 1050 degree. Yog tias tso tawm ncaj qha, nws tsis yog tsuas yog ua rau lub zog pov tseg loj, tab sis kuj ua rau muaj kuab paug rau ib puag ncig thermal. Tus nqi tseem ceeb ntawm boiler tshav kub rov qab kub exchangers yog nyob rau hauv lub tsev kaw - voj system ntawm "khoom cua sov capture npaum tshav kub pauv zog rov qab siv", raug txuam cov khib nyiab cov yam ntxwv ntawm steel cog boilers, converting poob pov tseg tshav kub mus rau hauv usable zog xws li preheating combustion cua, cua sov boiler feedwater, thiab generating steam, ua tiav cov khoom muaj nqis. Nws qhov kev ua tau zoo ncaj qha txiav txim siab qhov ua tau zoo ntawm boiler khib nyiab thaum tshav kub kub rov qab thiab lub zog-txuag thiab txo cov pa roj carbon monoxide, thiab yog tus choj tseem ceeb txuas rau boiler khib nyiab cua sov thiab rov siv lub zog.
(1) Kev txuag hluav taws xob thiab kev txo qis, txhim kho kev siv hluav taws xob zoo
Nyob rau hauv cov khib nyiab cua sov tawm los ntawm steel cog boilers, lub tshav kub nqa los ntawm high - kub flue gas ib leeg account rau ntau tshaj 40% ntawm tag nrho cov cua kub dissipation ntawm cov khoom. Qhov zoo ntawm boiler cua sov rov qab cov cua kub exchangers tuaj yeem ua tiav qhov kev hloov hluav taws xob ntau dua 85%, txhim kho kev siv hluav taws xob zoo heev. Piv txwv li, tom qab cov roj flue los ntawm lub tshuab hluav taws xob kub blast qhov cub raug kho los ntawm cov khoom siv hluav taws xob, cov cua thiab cov pa tuaj yeem ua rau preheated rau 190-380 degree, txo cov roj noj ntawm lub qhov cub kub kub thiab pab txhim kho lub zog ntawm qhov kawg ntawm cov txheej txheem tawg. Tag nrho cov txiaj ntsig tuaj yeem nce los ntawm 2% -4%; Tom qab qhia lub tshuab hluav taws xob loj loj rau hauv 2500 cubic meter blast qhov cub ntawm ib qho 10 lab ton steel kev lag luam, qhov kub ntawm cov cua combustion tau nce los ntawm chav tsev kub mus rau 380 degree, cov roj combustion efficiency ntawm lub cub tawg tau nce los ntawm 12%, thiab cov coke ratio poob los ntawm 550kg / ev. Nyob rau tib lub sijhawm, cov khoom siv hluav taws xob tuaj yeem txo qhov kub ntawm lub boiler mus rau 100-130 degree, tsis txhob poob cua sov thiab txhawb nqa tag nrho lub zog ntawm cov nroj tsuag steel mus rau hauv kev lag luam benchmark.
(2) Txo cov nqi thiab nce kev ua tau zoo, txhim kho cov kev sib tw tseem ceeb ntawm kev lag luam
Tus nqi zog yog ib qho tseem ceeb ntawm cov nqi tsim khoom ntawm cov tuam txhab steel. Boiler Thaum tshav kub kub rov qab cov khoom siv hluav taws xob ncaj qha txo cov nqi khiav lag luam rau cov lag luam los ntawm kev txo cov khoom siv roj thiab hluav taws xob, thaum txo cov cuab yeej ua haujlwm thiab kev tswj xyuas peev, ua tiav cov txiaj ntsig zoo dua. Noj 1800 cubic meter blast furnace ntawm Qinggang ua piv txwv, nrog kev txhawb nqa ntawm lub siab kub siab rov qab cov cua kub exchanger, ib qho ntxiv ntawm cov cua sov tuaj yeem rov qab tau txhua xyoo, sib npaug rau txuag 39.57 lab tus qauv cubic meters roj. Ua ke nrog kev txo cov pa tawm thiab kev txuag roj, lub zog txhua xyoo -txuag cov txiaj ntsig ncav cuag 9.116 lab yuan. Tom qab txiav tawm cov nqi khiav lag luam, lub zog nce ntxiv - txuag cov txiaj ntsig yog kwv yees li 8.91 lab yuan; Lub 120 tuj converter Rhiav txais ib tug kauv finned raj cua sov exchanger, uas yuav rov qab tau 12 lab kcal ntawm tshav kub rau ib lub cub tawg ntawm hlau, sib npaug rau txuag 1.2 tons ntawm txheem thee. Kev tsim hluav taws xob txhua xyoo nce los ntawm 18 lab kWh, thiab cov khoom siv tu lub voj voog raug txo los ntawm 4 zaug hauv ib xyoos mus rau 2 zaug, txo cov nqi kho los ntawm 40%. Rau cov tuam txhab steel loj, ua tiav boiler cua sov rov qab qhov hluav taws xob hloov hluav taws xob tuaj yeem txo cov nqi los ntawm ntau lab lossis txawm kaum lab tus yuan ib xyoos ib zaug, txhim kho lub tuam txhab kev sib tw ua lag luam.
(3) Ntsuab carbon txo, pab kev lag luam qis - carbon transformation
Raws li "dual carbon" lub hom phiaj, kev lag luam steel tab tom ntsib nruj emission yuav tsum tau txo. Boiler Thaum tshav kub kub rov qab cov khoom siv hluav taws xob tuaj yeem txo qis kev siv hluav taws xob xws li cov thee thiab cov pa roj carbon monoxide los ntawm kev rov qab cov khoom siv hluav taws xob los ntawm kev siv cov khoom siv hluav taws xob, yog li txo cov pa phem xws li carbon dioxide, sulfur dioxide, thiab nitrogen oxides. Raws li kev suav, rau txhua 1GJ ntawm cov khib nyiab pov tseg, kwv yees li 80-100kg ntawm carbon dioxide emissions yuav raug txo; Ua ib lub tuam txhab steel nrog lub peev xwm ntau lawm ntawm 5 lab tons ua piv txwv, nrog kev txhawb nqa ntawm boiler tshav kub rov qab cov cua kub exchangers, 26000 tons ntawm carbon dioxide, 750 tons ntawm sulfur dioxide, thiab 375 tons ntawm nitrogen oxides yuav txo tau txhua xyoo. Shiheng Tshwj Xeeb Steel rov qab cov khoom siv hluav taws xob los ntawm cov roj hluav taws xob los ntawm coke qhov cub riser tsho kub exchanger, ua tiav ntau yam txiaj ntsig ntawm kev txo cov coking zog noj thiab tswj cov pa phem. Nws tempered steel co ntau lawm carbon txo thiab fixation project txo carbon emissions los ntawm 300000 tons ib xyoos twg thiab tau raug lees paub tias yog ib tug "cov ntaub ntawv ntawm carbon neutrality" los ntawm Ministry of Ecology thiab ib puag ncig; Tom qab xa tawm ntau yam khoom siv hluav taws xob rov qab los ntawm cov khoom siv hluav taws xob thoob plaws tag nrho cov txheej txheem, ib lub tuam txhab ua lag luam steel tau txo cov pa roj carbon dioxide emissions los ntawm 850000 tons ib xyoos ib zaug thiab tsim cov txiaj ntsig kev lag luam ntawm ntau dua 230 lab yuan, ua kom pom qhov qis-carbon tus nqi ntawm cov khoom siv hluav taws xob.
Core hom thiab Technical nta: Haum rau ntau yam boiler scenarios nyob rau hauv steel nroj tsuag
Muaj ntau hom boilers nyob rau hauv steel nroj tsuag, nrog rau qhov sib txawv tseem ceeb nyob rau hauv khib nyiab yam ntxwv - kub xws li ntawm 100℃C mus rau 1050℃C, thiab complex flue gas compositions (xws li sulfur, chlorine, plua plav, thiab lwm yam). Cov khoom siv hluav taws xob zoo sib xws kuj tseem muaj ntau hom kev sib txawv, nrog rau cov tub ntxhais kiv puag ncig "kev siv cascade, kev hloov pauv kub", hloov mus rau qhov sib txawv boiler scenarios thiab khib nyiab kub zoo, ua tiav qhov siab tshaj plaws ntawm kev siv cov khoom siv hluav taws xob pov tseg, thiab daws cov ntsiab lus mob xws li corrosion, tshauv, thiab kev ua haujlwm degradation.
(1) Mainstream heat exchanger hom thiab technology zoo
1. Kev tswj qhov kub thiab txias dual preheating heat exchanger: Siv cov roj thermal ua cov cua kub nruab nrab, qhov kev sib pauv cua sov ntawm "flue gas thermal oil air/gas" yog tsim, muaj flue gas heat exchanger, air heat exchanger, gas heat exchanger and intelligent control system, feem ntau haum rau qis -kub flue gas khib nyiab hluav taws xob rov qab los ntawm lub tshuab hluav taws xob kub blaster furn. Nws qhov txiaj ntsig tseem ceeb yog los daws qhov teeb meem ntawm qis - kub acid dew point corrosion, alleviate phenomenon ntawm tshauv tsub kom, thiab lub neej kev pab cuam ntawm cov cuab yeej muaj peev xwm ncav cuag ntau tshaj 10 xyoo, deb tshaj lub neej kev pab cuam ntawm cov tsoos phaj thiab cov yeeb nkab kub exchangers los ntawm 3-5 xyoo. Nyob rau hauv ib txwm ua hauj lwm tej yam kev mob, cov khib nyiab cua sov ntawm lub flue gas inlet kub ntawm 280℃yuav rov qab los preheat cov pa roj thiab cua mus rau ib tug kub ntawm 190 degree; Thaum qhov kub ntawm qhov hluav taws xob hluav taws xob yog 330 degree, qhov kub ua ntej tuaj yeem nce mus rau 230 degree, thiab qhov tso pa tawm tuaj yeem txo qis dua 130 degree, nrog qhov tsawg kawg nkaus ntawm 100 degree.
2. High temperature sleeve heat exchanger: Designed for high temperature conditions, the upper limit of the working temperature of the hot fluid reaches 1050 ℃, breaking through the bottleneck of conventional heat exchangers in handling high temperature media. Adopting a "radiation+convection" composite heat transfer mode, the high-temperature section (>750 degree) siv lub tes tsho hom hluav taws xob hluav taws xob hloov hluav taws xob hloov hluav taws xob hloov hluav taws xob los ntawm cov yam ntxwv hluav taws xob hluav taws xob, kom tsis txhob muaj kev puas tsuaj thermal; Thaum kub poob qis dua 750 degree, hloov mus rau convective tshav kub hloov hom, ua ke nrog lub siab -kub hloov pauv kom zoo dua ntawm cov phaj kub exchangers, lub tshav kub hloov coefficient tuaj yeem ncav cuag 3500W / (m ² · K), thiab cov cuab yeej hneev taw yog txo los ntawm ntau dua 40% piv rau cov kev daws teeb meem ib txwm muaj [2]. Tom qab kev kho dua tshiab ntawm 2000m ³ moj tej tawg rauv nyob rau hauv ib tug tej yam steel nroj tsuag, cov efficiency ntawm cov roj sensible tshav kub rov qab tau nce los ntawm 22%, txuag 12000 tons ntawm txheem thee txhua xyoo.
3. Tube kub exchanger: Ib qho ntawm cov khoom siv dav tshaj plaws, cov tub ntxhais yog tsim los ntawm ntau lub siab - kub resistant hlau raj (xws li 310S stainless hlau, Inconel alloy, thiab lwm yam). Kub kub flue roj ntws tawm sab nraum lub raj ntim, thiab qhov nruab nrab yuav tsum tau rhuab mus rau hauv lub raj, ua tiav cov cua kub hloov mus los ntawm lub raj phab ntsa kub conduction. Cov qauv yog ruaj khov, muaj peev xwm tiv taus qhov kub thiab txias ntawm 800-1200 degree, yooj yim los ntxuav thiab tswj, thiab tsim nyog rau cov pa roj pa ib puag ncig nrog cov plua plav siab, xws li cov tshuab hluav taws xob thiab cov hloov pauv hauv cov nroj tsuag steel. Ib lub tuam txhab tshwj xeeb steel lub 120 tuj converter txais cov kauv finned raj kub exchanger, nrog rau ib qho chaw sib pauv kub ntawm 3200 square meters. Cov fins yog ua los ntawm cov khoom siv nickel chromium alloy nrog qhov kub thiab txias ntawm 850 degree, tiv taus qhov kub thiab txias corrosion thiab txo cov cua kub ntawm 800℃txog 280 degree. Cov pov tseg thaum tshav kub kub rov ua haujlwm yog qhov tseem ceeb.
4. Plate heat exchanger: Siv corrugated hlau daim hlau ua cov khoom sib pauv cua sov, cov kab nqaim yog tsim los ntawm cov phaj, thiab siab - kub flue gas ntws rov qab nrog qhov nruab nrab kom sov. Lub tshav kub hloov chaw yog qhov loj thiab qhov ua tau zoo yog siab, uas yog 10% -30% siab dua li cov khoom siv hluav taws xob sib txawv. Lub ntim compact yog haum rau qhov chaw tsis muaj xwm txheej. Rau qhov kub kub flue roj ntawm 650℃nyob rau hauv lub steel dov cua sov rauv, lub anti tshauv hom phaj tshav kub exchanger txais ib tug tshwj xeeb phaj tsim thiab yog nruab nrog ib tug tsis siv neeg tshauv tu system, uas yuav siv tau cov cua kub ntawm flue roj los preheat cua combustion thiab cov dej txias ntawm lub dov zeb, txo cov roj noj ntawm lub cua sov rauv los ntawm 10%.
5. Cov khoom siv hluav taws xob sib txuas: suav nrog cov khoom siv hluav taws xob, cua preheaters, cov yeeb nkab cua sov hloov pauv, thiab lwm yam, feem ntau yog siv rau nruab nrab thiab qis kub pov tseg thaum tshav kub kub rov qab (kub<500 ℃). Economizer recovers waste heat from boiler exhaust to heat water and reduce boiler energy consumption; Preheat the combustion air with an air preheater to improve combustion efficiency; Heat pipe heat exchangers have extremely strong thermal conductivity, dozens of times that of traditional metals, and can efficiently transfer heat at small temperature differences. They are suitable for the recovery of medium and low temperature waste heat such as blast furnace gas and sintering flue gas, but need to solve the problems of traditional heat pipe overheating and bursting, and annual performance degradation of 5%.
Kev Lag Luam Trends thiab Kev Loj Hlob Zoo
Nrog rau kev txhawb nqa ntawm lub teb chaws "Tshwj xeeb Action Plan for Energy Conservation thiab Carbon Reduction nyob rau hauv Steel Kev Lag Luam", thaum kawg ntawm 2025, lub zog noj ib chav tsev khoom ntawm blast furnaces thiab converters nyob rau hauv lub steel kev lag luam yuav raug txo los ntawm ntau tshaj 1% piv rau 2023, thiab tag nrho lub zog noj ib tuj ntawm steel yuav raug txo los ntawm ntau tshaj 2%. Boiler heat recovery heat exchangers, raws li cov khoom siv tseem ceeb rau kev txuag hluav taws xob thiab txo cov pa roj carbon monoxide, yuav coj mus rau hauv qhov chaw loj hlob. Raws li kev tsim kho kev lag luam xav tau thiab cov lus qhia kev tsim kho thev naus laus zis, yuav muaj peb qhov kev txhim kho loj rau boiler cua sov rov qab cov cua kub exchangers yav tom ntej.
Ib qho yog kev kho dua tshiab ntawm kev txawj ntse, kev sib koom ua ke cov thev naus laus zis tshiab xws li AI, cov ntxaib digital, thiab Is Taws Nem ntawm Yam kom ua tiav - lub sijhawm saib xyuas, kev tswj xyuas meej, thiab kev ceeb toom ua txhaum ntawm kev ua haujlwm ntawm cov khoom siv hluav taws xob, ntxiv kev txhim kho cov khoom siv hluav taws xob thiab txo cov nqi ua haujlwm thiab kev saib xyuas; Nyob rau tib lub sijhawm, kev txhim kho ntawm cov hloov pauv hloov pauv hloov pauv tuaj yeem hloov kho cov haujlwm ua haujlwm raws li qhov hloov pauv hauv cov khoom siv hluav taws xob pov tseg thiab cov nqi ntws, hloov mus rau cov txheej txheem khib nyiab hauv cov nroj tsuag steel.
Qhov thib ob yog cov khoom siv thiab cov qauv tsim kho tshiab, siv ntau dua siab dua -kub thiab corrosion- cov ntaub ntawv tiv taus hlau, xws li INCONEL 625, 310S stainless hlau, thiab lwm yam, txhawm rau txhim kho kev ruaj ntseg ntawm cov khoom siv hluav taws xob hauv qhov kub, siab corrosion, thiab siab plua plav puag ncig; Txhim kho cov qauv tsim ntawm cov khoom siv hluav taws xob sib txawv, txhim kho cov khoom siv hluav taws xob sib txuas thiab ua kom zoo dua qub, txo cov hneev taw, thiab txhim kho qhov chaw siv, xws li txo cov hneev taw ntawm siab - qhov kub ntawm lub tes tsho kub exchangers ntau dua 40% piv rau cov kev daws teeb meem ib txwm muaj.
Qhov thib peb yog kev txhim kho ntawm kev sib koom ua ke, uas ua ke nrog boiler cua sov rov qab cov khoom siv hluav taws xob nrog cov roj rov qab, lub voj voog lub voj voog, thiab lub zog cia khoom los tsim kom muaj kev sib koom ua ke siv hluav taws xob, txhim kho kev lag luam lub zog ntawm tus kheej - txaus, thiab tiv thaiv cov nqi hluav taws xob hloov pauv thiab cov khoom siv hluav taws xob txaus ntshai; Nyob rau tib lub sijhawm, kev sib txuas cov thev naus laus zis tshiab xws li hydrogen metallurgy, optimizing heat exchanger design, adapting to new heat source structures, thiab txhawb kev lag luam steel kom txav los ntawm "kev txuag hluav taws xob thiab txo qis" mus rau "zero carbon emissions".
Tsis tas li ntawd, nrog kev txhim kho txuas ntxiv ntawm cov qauv kev lag luam, xws li kev txhawb nqa ntawm cov qauv kev lag luam rau kev rov qab los ntawm cov khoom siv hluav taws xob los ntawm coke cub riser gas, daim ntawv thov ntawm boiler cua sov rov qab cov cua sov exchangers yuav ntau standardized thiab standardized, txhawb lub zuag qhia tag nrho lub zog efficiency theem ntawm kev lag luam. Raws li lub teb chaws hlau tsim muaj peev xwm ntawm 1 billion tons, yog hais tias cov boiler kub rov qab kub exchangers yog siab txhawb nqa, nws yuav txuag tau txog 4.8 billion yuan nyob rau hauv cov nqi thiab txo carbon dioxide emissions los ntawm 5.2 lab tons ib xyoos twg, nrog rau cov nyiaj txiag tseem ceeb thiab ib puag ncig cov txiaj ntsig.
