Silicon Carbide FGD Nozzle rau desulfurization hauv fais fab nroj tsuag

Cov Nozzles Absorber rau Flue Gas Desulfurization (FGD)
Tshem tawm cov sulfur oxides, feem ntau hu ua SOx, los ntawm cov pa tso pa tawm siv cov tshuaj alkali reagent, xws li cov dej limestone ntub.

Thaum cov roj fossil siv rau hauv cov txheej txheem combustion los khiav cov boilers, furnaces, lossis lwm yam khoom siv lawv muaj peev xwm tso tawm SO2 lossis SO3 ua ib feem ntawm cov pa tawm. Cov sulfur oxides no yooj yim teb nrog lwm cov ntsiab lus los tsim cov tshuaj lom neeg xws li sulfuric acid thiab muaj peev xwm cuam tshuam tsis zoo rau tib neeg kev noj qab haus huv thiab ib puag ncig. Vim yog cov teebmeem no, kev tswj hwm cov tshuaj no hauv cov pa flue yog ib feem tseem ceeb ntawm cov chaw tsim hluav taws xob thee thiab lwm yam kev siv hauv kev lag luam.

Vim muaj kev txhawj xeeb txog kev yaig, kev txhaws, thiab kev sib sau ua ke, ib qho ntawm cov txheej txheem txhim khu kev qha tshaj plaws los tswj cov pa phem no yog cov txheej txheem qhib-tower ntub flue gas desulfurization (FGD) siv cov limestone, hydrated lime, dej hiav txwv, lossis lwm yam kua alkaline. Cov tshuaj tsuag nozzles muaj peev xwm faib cov slurries no mus rau hauv cov towers nqus tau zoo thiab ntseeg tau. Los ntawm kev tsim cov qauv sib xws ntawm cov tee dej me me, cov nozzles no muaj peev xwm tsim tau thaj chaw xav tau rau kev nqus tau zoo thaum txo qis kev nkag ntawm cov tshuaj txhuam mus rau hauv cov pa roj flue.

Xaiv lub FGD Absorber Nozzle:
Cov yam tseem ceeb uas yuav tsum xav txog:

Kev ntsuas qhov ntom thiab viscosity ntawm cov khoom siv txhuam
Qhov loj ntawm cov tee dej uas xav tau
Qhov loj ntawm cov tee dej kom raug yog qhov tseem ceeb rau kev ua kom ntseeg tau tias cov nqi nqus dej kom raug
Cov khoom siv nozzle
Vim tias cov pa roj flue feem ntau yog corrosive thiab cov kua txhuam feem ntau yog cov slurry nrog cov khoom khov siab thiab cov khoom abrasive, kev xaiv cov khoom siv corrosion thiab hnav tsis kam yog qhov tseem ceeb.
Nozzle tsis kam rau txhaws
Vim tias cov kua ntxuav feem ntau yog cov slurry uas muaj cov khoom khov ntau, kev xaiv lub nozzle hais txog kev tiv thaiv kev txhaws yog qhov tseem ceeb.
Tus qauv thiab qhov chaw ntawm lub nozzle tsuag
Yuav kom ntseeg tau tias qhov nqus tau zoo, kev npog tag nrho ntawm cov pa roj tsis muaj kev hla dhau thiab lub sijhawm nyob txaus yog qhov tseem ceeb
Qhov loj thiab hom ntawm kev sib txuas nozzle
Cov nqi ntws ntawm cov kua ntxuav uas xav tau
Qhov siab poob (∆P) hla lub nozzle
∆P = lub zog muab khoom ntawm qhov nkag ntawm lub nozzle - lub zog ua haujlwm sab nraud ntawm lub nozzle
Peb cov engineers uas muaj kev paub dhau los tuaj yeem pab txiav txim siab seb lub nozzle twg yuav ua haujlwm raws li qhov xav tau nrog koj cov ntsiab lus tsim qauv
Cov Kev Siv thiab Kev Lag Luam ntawm FGD Absorber Nozzle:
Cov thee thiab lwm cov chaw tsim hluav taws xob roj fossil
Cov chaw ua roj av
Cov chaw hlawv khib nyiab hauv nroog
Cov chaw ua cua sov cement
Cov chaw ua hlau

Daim Ntawv Qhia Txog Cov Khoom Siv SiC

Qhov Tsis Zoo nrog Lime / Limestone

Raws li pom hauv Daim Duab 1, cov txheej txheem FGD siv cov kua qaub/limestone forced oxidation (LSFO) suav nrog peb lub txheej txheem tseem ceeb:

• Kev npaj, kev tuav thiab kev khaws cia reagent
• Lub nkoj nqus dej
• Kev tswj cov khib nyiab thiab cov khoom seem

Kev npaj cov tshuaj reagent muaj xws li kev xa cov pob zeb limestone uas raug tsoo (CaCO3) los ntawm lub silo cia mus rau lub tank pub mov uas tau sib xyaw. Cov kua limestone uas tau los ntawm cov tshuaj no ces raug thawb mus rau lub thawv nqus nrog rau cov pa roj flue ntawm lub boiler thiab cov cua oxidizing. Cov tshuaj tsuag nozzles xa cov tee me me ntawm cov tshuaj reagent uas tom qab ntawd ntws rov qab mus rau cov pa roj flue uas nkag los. Cov SO2 hauv cov pa roj flue reacts nrog cov tshuaj calcium-nplua nuj los ua cov calcium sulfite (CaSO3) thiab CO2. Cov cua nkag mus rau hauv lub absorber txhawb kev oxidation ntawm CaSO3 mus rau CaSO4 (daim ntawv dihydrate).

Cov tshuaj tiv thaiv LSFO yooj yim yog:

CaCO3 + SO2 → CaSO3 + CO2 · 2H2O

Cov dej khib nyiab uas tau oxidized yuav sib sau ua ke hauv qab ntawm lub absorber thiab tom qab ntawd rov ua dua nrog rau cov reagent tshiab rov qab mus rau lub taub hau ntawm lub nozzle txau. Ib feem ntawm cov dej rov ua dua tshiab raug rho tawm mus rau lub kaw lus tswj cov khib nyiab/cov khoom seem, uas feem ntau muaj cov hydrocyclones, lub nruas lossis cov lim dej siv, thiab lub tank tuav cov dej khib nyiab/cawv uas tau sib xyaw. Cov dej khib nyiab los ntawm lub tank tuav tau rov ua dua tshiab rov qab mus rau lub tank pub cov reagent limestone lossis mus rau lub hydrocyclone qhov twg cov dej ntws tawm raug tshem tawm ua cov dej khib nyiab.

Cov Txheej Txheem Txhuam Txhuam Uas Siv Lime/Limestone Yuam Oxidatin

Cov txheej txheem LSFO ntub feem ntau tuaj yeem ua tiav qhov kev tshem tawm SO2 ntawm 95-97 feem pua. Txawm li cas los xij, kev ncav cuag cov theem siab dua 97.5 feem pua ​​kom ua tau raws li qhov yuav tsum tau tswj cov pa phem, txawm li cas los xij, yog qhov nyuaj, tshwj xeeb tshaj yog rau cov nroj tsuag siv cov thee uas muaj cov pa roj sulfur ntau. Cov tshuaj catalysts magnesium tuaj yeem ntxiv lossis cov limestone tuaj yeem raug calcined rau cov reactivity lime (CaO) siab dua, tab sis cov kev hloov kho no suav nrog cov khoom siv cog ntxiv thiab cov nqi zog thiab cov nqi zog. Piv txwv li, calcining rau lime xav tau kev teeb tsa ntawm lub qhov cub lime sib cais. Tsis tas li ntawd, lime tau yooj yim precipitated thiab qhov no ua rau muaj peev xwm rau kev tsim cov nplai hauv lub scrubber.

Tus nqi ntawm calcination nrog lub qhov cub limestone tuaj yeem txo tau los ntawm kev txhaj tshuaj limestone ncaj qha rau hauv lub cub tawg boiler. Hauv txoj hauv kev no, limestone tsim tawm hauv lub boiler raug nqa nrog cov pa roj flue mus rau hauv lub scrubber. Cov teeb meem uas yuav tshwm sim suav nrog boiler fouling, kev cuam tshuam nrog kev hloov pauv cua sov, thiab lime inactivation vim overburning hauv lub boiler. Ntxiv mus, cov limestone txo qhov kub ntawm cov tshauv molten hauv cov boilers hluav taws kub, ua rau muaj cov khoom khov uas yuav tsis tshwm sim.

Cov khib nyiab ua kua los ntawm cov txheej txheem LSFO feem ntau yog xa mus rau cov pas dej ruaj khov nrog rau cov khib nyiab ua kua los ntawm lwm qhov chaw hauv lub chaw fais fab. Cov dej FGD uas ntub dej tuaj yeem ntub nrog cov tshuaj sulfite thiab sulfate thiab kev xav txog ib puag ncig feem ntau txwv nws cov dej ntws mus rau cov dej ntws, cov kwj deg lossis lwm cov dej ntws. Tsis tas li ntawd, kev siv cov khib nyiab / cawv rov qab mus rau lub tshuab ntxuav tuaj yeem ua rau muaj cov ntsev sodium, potassium, calcium, magnesium lossis chloride uas yaj. Cov tsiaj no tuaj yeem ua rau crystallize tshwj tsis yog tias muaj kev ntws txaus los khaws cov ntsev yaj hauv qab qhov tsis txaus. Ib qho teeb meem ntxiv yog qhov qeeb qeeb ntawm cov khib nyiab khov, uas ua rau xav tau cov pas dej ruaj khov loj, ntim ntau. Hauv cov xwm txheej ib txwm muaj, cov txheej khov hauv pas dej ruaj khov tuaj yeem muaj 50 feem pua ​​lossis ntau dua cov kua txawm tias tom qab ntau lub hlis ntawm kev khaws cia.

Cov calcium sulfate uas tau rov qab los ntawm cov tshuaj absorber recycle slurry muaj ntau nyob rau hauv cov limestone thiab calcium sulfite tshauv uas tsis tau ua haujlwm. Cov kab mob no tuaj yeem tiv thaiv cov calcium sulfate los ntawm kev muag ua cov gypsum hluavtaws rau kev siv rau hauv phab ntsa, plaster, thiab cement tsim. Limestone uas tsis tau ua haujlwm yog cov khoom tsis huv uas pom muaj nyob rau hauv cov gypsum hluavtaws thiab nws kuj yog cov khoom tsis huv uas pom muaj ntau hauv cov gypsum ntuj (mined). Txawm hais tias limestone nws tus kheej tsis cuam tshuam rau cov khoom ntawm cov khoom kawg ntawm phab ntsa, nws cov khoom siv abrasive ua rau muaj teeb meem hnav rau cov khoom siv ua. Calcium sulfite yog cov khoom tsis huv uas tsis xav tau hauv txhua yam gypsum vim nws cov khoom me me ua rau muaj teeb meem scaling thiab lwm yam teeb meem ua haujlwm xws li ntxuav ncuav mog qab zib thiab dewatering.

Yog tias cov khoom khov uas tsim tawm hauv cov txheej txheem LSFO tsis muaj peev xwm muag tau raws li cov gypsum hluavtaws, qhov no ua rau muaj teeb meem pov tseg pov tseg loj heev. Rau lub boiler 1000 MW uas hlawv 1 feem pua ​​​​​​ntawm cov thee sulfur, qhov ntau ntawm gypsum yog kwv yees li 550 tons (luv) / hnub. Rau tib lub Hoobkas uas hlawv 2 feem pua ​​​​​​ntawm cov thee sulfur, qhov kev tsim khoom gypsum nce mus txog kwv yees li 1100 tons / hnub. Ntxiv qee qhov 1000 tons / hnub rau kev tsim cov tshauv ya, qhov no coj tag nrho cov khib nyiab khov kho tonnage mus txog li 1550 tons / hnub rau 1 feem pua ​​​​​​ntawm cov thee sulfur thiab 2100 tons / hnub rau 2 feem pua ​​​​​​ntawm cov rooj plaub sulfur.

Cov txiaj ntsig ntawm EADS

Ib txoj kev siv tshuab uas tau ua pov thawj lawm rau LSFO scrubbing hloov limestone nrog ammonia ua cov tshuaj reagent rau kev tshem tawm SO2. Cov khoom siv reagent khov kho milling, khaws cia, tuav thiab thauj khoom hauv LSFO system raug hloov los ntawm cov thoob dej cia yooj yim rau ammonia aqueous lossis anhydrous. Daim duab 2 qhia txog cov duab qhia txog kev ntws rau EADS system uas muab los ntawm JET Inc.

Ammonia, cov pa roj flue, cov cua oxidizing thiab cov dej ua haujlwm nkag mus rau hauv lub tshuab nqus uas muaj ntau theem ntawm cov nozzles tsuag. Cov nozzles tsim cov tee me me ntawm cov tshuaj reagent uas muaj ammonia kom ntseeg tau tias cov tshuaj reagent sib cuag nrog cov pa roj flue nkag los raws li cov tshuaj tiv thaiv hauv qab no:

(1) SO2 + 2NH3 + H2O → (NH4) 2SO3

(2) (NH4)2SO3 + ½O2 → (NH4)2SO4

Cov SO2 nyob rau hauv cov pa roj flue cuam tshuam nrog ammonia nyob rau hauv ib nrab sab saud ntawm lub thawv kom tsim tau ammonium sulfite. Hauv qab ntawm lub thawv absorber ua haujlwm ua lub tank oxidation qhov twg huab cua oxidizes cov ammonium sulfite rau ammonium sulfate. Cov kua ammonium sulfate uas tau los ntawm kev raug thawb rov qab mus rau lub taub hau ntawm ntau theem hauv lub absorber. Ua ntej cov pa roj flue uas tau txhuam tawm ntawm sab saum toj ntawm lub absorber, nws hla dhau lub demister uas sib sau ua ke cov kua dej uas tau nkag mus thiab ntes cov khoom me me.

Qhov tshuaj ammonia sib xyaw nrog SO2 thiab sulfite oxidation rau sulfate ua rau muaj kev siv cov tshuaj reagent siab. Plaub phaus ntawm ammonium sulfate raug tsim tawm rau txhua phaus ntawm ammonia noj.

Ib yam li cov txheej txheem LSFO, ib feem ntawm cov kua tshuaj reagent/khoom siv rov qab tuaj yeem raug rho tawm los tsim cov khoom lag luam. Hauv lub kaw lus EADS, cov kua khoom siv rov qab raug thawb mus rau lub kaw lus rov qab cov khoom khov uas muaj hydrocyclone thiab centrifuge los ua kom cov khoom ammonium sulfate sib xyaw ua ntej ziab thiab ntim khoom. Txhua cov kua (hydrocyclone overflow thiab centrifuge centrate) raug coj rov qab mus rau lub tank slurry thiab tom qab ntawd rov qab coj mus rau hauv lub absorber ammonium sulfate recycle stream.

• Cov txheej txheem EADS muab kev ua haujlwm tshem tawm SO2 siab dua (> 99%), uas ua rau cov chaw tsim hluav taws xob siv thee muaj kev ywj pheej ntau dua los sib xyaw cov thee pheej yig dua, muaj cov sulfur ntau dua.
• Txawm hais tias LSFO cov txheej txheem tsim 0.7 tons ntawm CO2 rau txhua ton ntawm SO2 raug tshem tawm, EADS cov txheej txheem tsis tsim CO2.
• Vim tias cov txiv qaub ntsuab thiab cov limestone tsis tshua muaj zog piv rau ammonia rau kev tshem tawm SO2, kev siv dej ntau dua thiab lub zog twj tso kua mis yuav tsum tau ua kom tiav cov nqi ntws siab. Qhov no ua rau cov nqi khiav lag luam siab dua rau LSFO systems.
• Cov nqi peev rau EADS cov kab ke zoo ib yam li cov rau kev tsim lub LSFO system. Raws li tau hais los saum toj no, thaum lub EADS system xav tau cov khoom siv ua ammonium sulfate thiab cov khoom siv ntim khoom, cov chaw npaj cov tshuaj reagent uas cuam tshuam nrog LSFO tsis tas yuav tsum tau rau kev sib tsoo, kev tuav thiab kev thauj mus los.

Qhov zoo tshaj plaws ntawm EADS yog kev tshem tawm cov kua thiab cov khib nyiab khov. Cov thev naus laus zis EADS yog cov txheej txheem tsis muaj kua, uas txhais tau tias tsis tas yuav kho cov dej khib nyiab. Cov khoom lag luam ammonium sulfate khov kho tau yooj yim muag; ammonia sulfate yog cov chiv thiab cov khoom siv chiv uas siv ntau tshaj plaws hauv ntiaj teb, nrog rau kev loj hlob ntawm kev lag luam thoob ntiaj teb xav kom txog xyoo 2030. Tsis tas li ntawd, thaum kev tsim cov ammonium sulfate xav tau lub centrifuge, lub tshuab ziab khaub ncaws, lub tshuab xa khoom thiab cov khoom siv ntim khoom, cov khoom no tsis yog tus tswv thiab muaj nyob rau hauv kev lag luam. Nyob ntawm seb muaj kev lag luam thiab kev ua lag luam li cas, cov chiv ammonium sulfate tuaj yeem them taus cov nqi rau ammonia-based flue gas desulfurization thiab muaj peev xwm muab cov txiaj ntsig zoo.

Cov Txheej Txheem Ua Haujlwm Zoo ntawm Ammonia Desulfurization

Shandong Zhongpeng Special Ceramics Co., Ltd yog ib qho ntawm cov khoom siv tshiab silicon carbide ceramic loj tshaj plaws hauv Suav teb. SiC technical ceramic: Moh qhov nyuaj yog 9 (New Moh qhov nyuaj yog 13), nrog kev tiv thaiv zoo heev rau kev yaig thiab xeb, kev puas tsuaj zoo heev - kev tiv thaiv thiab kev tiv thaiv oxidation. SiC cov khoom lub neej kev pabcuam yog 4 txog 5 zaug ntev dua li 92% alumina khoom. MOR ntawm RBSiC yog 5 txog 7 zaug ntawm SNBSC, nws tuaj yeem siv rau cov duab nyuaj dua. Cov txheej txheem hais nqe yog ceev, kev xa khoom yog raws li tau cog lus tseg thiab qhov zoo yog qhov thib ob rau tsis muaj leej twg. Peb ib txwm mob siab rau kev sib tw peb lub hom phiaj thiab muab peb lub siab rov qab rau lub zej zog.