Cov ntsiab lus: Cov lus qhia no suav nrog kev xaiv cov hlau, cov txheej txheem peev casting, qhov tsis xws luag, CNC machining thiab kev soj ntsuam cov cai rau kev cai cam khwb cia denitrification nozzles siv hauv SCR thiab SNCR flue gas systems.
Denitrification nozzles yog cov khoom siv tseem ceeb hauv SCR thiab SNCR flue gas denitration systems, raug rau qhov kub thiab txias, ammonia / urea corrosion thiab ya tshauv yaig.
Cov lus qhia no tsom rau cov cam khwb cia denitrification nozzles, npog cov kev ua haujlwm raug, kev sib piv qib alloy, peev casting workflow, kev tiv thaiv tsis xws luag thiab CNC xov sau ntawv rau kev cai nozzle castings.
Dab tsi yog Cast Denitrification Nozzle & Nws Cov Kev Pabcuam
Lub cam khwb cia denitrification nozzle yog ib tug precision cam khwb cia tivthaiv tsim los txhaj urea los yog ammonia reductant uniformly rau hauv flue gas ntws rau denitration kho.
Tsis zoo li nozzles machined ncaj qha los ntawm cov khoom bar Tshuag, cam khwb cia denitrification nozzles txhawb txoj hauv kev ntws ntws, ntau qhov chaw nres nkoj thiab kev sib xyaw ua ke uas nyuaj lossis raug nqi tsim los ntawm cov khoom lag luam khoom.
Kev khiav hauj lwm ib puag ncig rau flue gas denitration nozzles tsim ua ke degradation mechanisms uas luv lub neej kev pab cuam:
- Nruam los yog hloov pauv qhov kub thiab txias nyob rau hauv boiler thiab ductwork;
- Tshuaj corrosion los ntawm ammonia, ammonium bisulfate thiab acidic flue gas byproducts;
- Cov khoom erosion tshwm sim los ntawm ya tshauv nyob rau hauv lub flue gas;
- Rov ua dua thermal caij tsheb kauj vab uas qhia txog kev ntxhov siab ntawm kev qaug zog ntawm cov phab ntsa nyias nyias thiab nyob ib puag ncig lub taub hau.
Kab lus no yuav tsis nkag mus tob rau hauv SCR lossis SNCR tshuaj tiv thaiv kev tshawb xav.
Tag nrho cov kev taw qhia ntawm no yog nruab nrab ntawm cov khoom siv casting, kev tsim khoom zoo thiab kev tshuaj xyuas ntawm lub nozzle casting nws tus kheej.
Alloy khoom xaiv rau Denitrification Nozzle Castings
Kev xaiv cov khoom siv yog qhov kev txiav txim siab tshaj plaws rau denitrification nozzle kev pab cuam lub neej.
Rau kev pab cuam denitration, erosion kuj feem ntau yog qhov tseem ceeb, ua raws li qhov kub thiab txias stability, corrosion kuj thiab project pob nyiaj siv.
Qhov zoo tshaj plaws tshuaj tsuag orifice cheeb tsam yog qhov feem ntau tsis ua hauj lwm qhov chaw rau cam khwb cia nozzles.
Cov ntsiab cai xaiv rau denitration nozzle alloys
Thaum ntsuam xyuas casting alloys rau denitrification nozzles, phim cov qib alloy mus rau qhov tseem ceeb tsis ua hauj lwm hom nyob rau hauv koj flue gas ib puag ncig:
- Hnyav ya tshauv loading: ua ntej hnav-resistant cobalt lossis hardfacing alloys;
- High ammonium bisulfate thiab acidic condensate kev pheej hmoo: ua ntej cov nickel-molybdenum corrosion-resistant alloys;
- Ruaj khov, nruab nrab kub nrog cov pa roj huv huv: siv cov cua sov-resistant stainless hlau rau kev tswj tus nqi.
Common casting alloy qib & daim ntawv thov ciam teb
Txhua qib alloy muaj qhov ua tau zoo thiab cov kev txwv rau cov ntawv thov flue gas denitration:
- 310S stainless hlau casting: haum rau nruab nrab kub, kuj huv si flue roj thiab tsawg ya tshauv concentration; txwv erosion kuj nyob rau hauv hnyav tshauv cuam tshuam.
- Duplex 2205 / 2507: muab cov tshuaj tiv thaiv zoo rau cov tshuaj chloride thiab acidic corrosion, tab sis muaj qhov kev pabcuam kub qis dua piv nrog cov nickel-based heat-resistant alloys.
- Hastelloy C276: nyiam dua thaum ammonium bisulfate corrosion thiab acidic flue gas yog thawj qhov kev pheej hmoo; ua tau zoo nyob rau hauv hnyav corrosive denitration ib puag ncig.
- Stellite 6 (cobalt alloy): zoo heev tiv thaiv particle yaig; qhov kev xaiv saum toj kawg nkaus rau cov chaw uas muaj cov hmoov tshauv yoov tshaj cum, txawm tias nws los ntawm cov khoom siv zoo tshaj plaws thiab tus nqi machining.
- Inconel 625: haum rau hnyav-ua haujlwm thee-hluav taws xob fais fab nroj tsuag qhov chaw kub, corrosion thiab ya tshauv yaig ua ke.
Cov ntaub ntawv sib piv rau cov cam khwb cia denitrification nozzles
Nco tseg: Kub qhia tau hais txog txuas mus ntev kev pab cuam kub xwb. Qhov kub siab tshaj plaws nyob rau lub sijhawm tuaj yeem tshaj cov nqi no. Rau kev siv dav dav nkaus xwb. Cov ntaub ntawv pov thawj kawg yuav tsum tau lees paub nrog cov ntaub ntawv flue gas muaj pes tsawg leeg los ntawm koj qhov chaw thiab cov ntaub ntawv alloy zeb.
| Alloy Qib | Max Continuous Service Temp | Corrosion Resistance | Erosion Resistance | Hom Kev Denitration Scenario | Tus nqi txheeb ze |
| 310S Stainless hlau | 1050 ° C | Nruab nrab | Tsawg | Clean flue gas, tsawg ya tshauv | Tsawg |
| TIAB SA 2507 | 315 ° C | Siab | Nruab nrab | Mid-kub acidic flue gas | Nruab nrab |
| Hastelloy C276 | 1040 ° C | Siab heev | Nruab nrab-siab | Ammonium bisulfate corrosion kuj | Siab |
| Stellite 6 | 815 ° C | Nruab nrab | Siab heev | Hnyav ya tshauv yaig | Siab heev |
| Ib 625 | 980 ° C | Siab heev | Siab | Combined siab kub, corrosion & yaig | Siab heev |
Casting txheej txheem rau Denitrification Nozzle Cheebtsam
Txoj kev zoo tshaj plaws casting: peev casting (poob ciab casting)
Kev nqis peev casting, tseem hu ua poob ciab casting, yog qhov tseem ceeb ntawm kev tsim khoom rau kev ua haujlwm siab denitrification nozzle castings.
Cov txheej txheem no zoo haum rau cov ntu no rau ntau qhov laj thawj:
- Nws reproduces intricate intricate flow passages, nyias phab ntsa thiab me me precision tshuaj orifice nta nrog siab sib xws;
- Nws tsim ib tug du li-cam khwb cia nto, txo tus nqi ntawm cov khoom tshem tawm yuav tsum tau nyob rau hauv tom qab CNC machining.
Xuab zeb casting feem ntau tsis pom zoo rau kev txiav txim siab denitrification nozzles nrog txoj hauv kev hauv tsev lossis cov tshuaj tsuag tseem ceeb heev.
Tej zaum nws yuav raug suav hais tias tsuas yog rau qhov yooj yim, tsis muaj lub luag haujlwm nozzles nrog kev ua haujlwm xoob.
Coarse nto tiav, muaj kev pheej hmoo siab dua ntawm kev hloov pauv ntawm cov tub ntxhais thiab cov porosity nyob ze ntawm qhov nqaim ntws ua rau cov xuab zeb castings tsis tshua muaj kev ntseeg siab rau feem ntau cov ntawv thov denitration.
Foundry zoo tswj cov ntsiab lus
Cov txheej txheem Foundry tswj ncaj qha txiav txim siab seb lub nozzle casting puas muaj sia nyob ua haujlwm:
- shielded melting cua kom tsis txhob oxidation thiab lub caij poob hauv high-alloy melts;
- Zoo molten hlau pom kom ntxiab slag hais ua ntej sau cov pwm kab noj hniav;
- Kev cai rooj vag thiab riser layout tsim tshwj xeeb rau nozzle geometry, rau lub hom phiaj shrinkage defects deb ntawm tshuaj tsuag orifices;
- Refractory plhaub khoom xaiv tau tshaj reactive nickel thiab cobalt alloy melts.
Qhov tseem ceeb ntawm casting tsis xws luag & tsis ua hauj lwm txaus ntshai rau denitrification nozzles
Qee qhov teeb meem casting tsim teeb meem kev ntseeg siab loj rau denitrification nozzles, txawm tias ib feem dhau qhov kev tshuaj xyuas qhov muag pom:
- Shrinkage porosity nyob ze ntawm cov tshuaj tsuag orifice: tuaj yeem ua rau tsis sib xws atomization, sab hauv to thiab ceev hauv zos yaig;
- Slag suav nrog: tsim cov ntsiab lus pib rau kev nthuav tawm tawg nyob rau hauv thermal cycling;
- Kub tearing: feem ntau tshwm sim nyob rau hauv seem hloov thiab nyias nozzle phab ntsa nyob rau hauv siab alloy solidification kev nyuaj siab;
- Core hloov: hloov txoj hauj lwm orifice, tshuaj tsuag lub kaum sab xis thiab txaus faib ntawm lub nozzle tiav.
Cov kev tiv thaiv muaj xws li pwm simulation, tswj cov cua txias thiab cov tub ntxhais kev txhawb nqa tsim thaum lub sij hawm siv quav ciab qauv.
CNC Machining, Inspection & Txais Cov Lus Cim
Casting muab qhov ze-net-zoo li dawb paug, tab sis qhov tseem ceeb ua hauj lwm nto ntawm ib tug denitrification nozzle cia siab rau precision post-processing.
Machining tsom rau nozzle orifice thiab sealing nto
Cov tshuaj tsuag orifice bore, sealing ntsej muag, threaded kev twb kev txuas thiab mounting interfaces yuav tsum nruj kam rau ua CNC machining.
Qhov kawg orifice geometry ncaj qha tswj cov tshuaj tsuag lub kaum ntse ntse, qhov loj me me thiab ntws tus nqi.
Nickel-based thiab cobalt-based alloys nyuaj rau tshuab.
Cov khw tsim cov denitrification nozzle castings yuav tsum xaiv cov cuab yeej tsim nyog, txiav cov kev txwv thiab cov tswv yim txias kom tsis txhob ua haujlwm tawv, nto tearing thiab qhov ntev.
Yuav tsum tau NDT & kev xeem txais
Kev lees paub kev tshuaj xyuas rau qhov tseem ceeb denitrification nozzle castings feem ntau suav nrog:
- PT penetrant kuaj xyuas kom pom cov kab nrib pleb, kua muag kub thiab nthuav tawm porosity;
- UT ultrasonic soj ntsuam rau subsurface shrinkage los yog inclusions nyob rau hauv tuab seem;
- Kev ntsuam xyuas hydrostatic los xyuas kom meej tias cov dej ntws sab hauv tsis muaj qhov nkag mus;
- CMM qhov kev tshuaj ntsuam xyuas kom paub meej tias qhov loj me, lub kaum ntse ntse thiab qhov ntsuas qhov ntev sib phim cov duab kos.
Cov kev xaiv tom qab kho
Passivation feem ntau yog siv rau stainless hlau thiab npib tsib xee alloy nozzles los txhim kho qhov corrosion kuj.
Stabilizing kev kho cua sov yuav raug teev tseg kom txo qis qhov seem casting kev nyuaj siab ua ntej kev teeb tsa.
Hardfacing tuaj yeem raug txiav txim siab rau kev tiv thaiv hnav ntxiv hauv qhov chaw muaj tshauv yaig heev.
Common Application Scenarios of Cast Denitrification Nozzles
Cam khwb cia denitrification nozzles tau dav siv thoob plaws hauv chaw kho mob flue gas kho mob:
- Coal-fired fais fab nroj tsuag SCR thiab SNCR denitration systems;
- Cement kiln flue gas denitration units;
- Khib-rau-zog thiab biomass combustion boilers;
- Muaj cua sov thiab incinerator flue gas kho tej yaam num.
Koj tuaj yeem nrhiav tau peb cov kev cai cam khwb cia denitrification nozzles ntawm peb nplooj ntawv khoom siab.
Rau cov keeb kwm yav dhau los ntawm kev tsim khoom zoo sib xws, koj tuaj yeem tshuaj xyuas peb cov lus qhia rau kev kub-kub alloy castings.
FAQ
Kuv puas tuaj yeem siv tus qauv 316L cam khwb cia nozzles rau hnyav-duty denitrification?
Feem ntau tsis muaj. 316L muaj qhov txwv tsis pub muaj qhov kub thiab txias tsis zoo rau ammonium bisulfate thiab ya tshauv yaig.
Nws yog tsis tsim nyog rau yuav luag txhua qhov hnyav-duty denitration ib puag ncig. Nws tsuas yog siv tau nyob rau hauv qhov kub thiab txias, huv si flue roj uas tsis yog qhov tseem ceeb denitration loops.
Puas yog peev casting ib txwm xav tau rau denitrification nozzles?
Rau kev cai nozzles nrog txoj kev sab hauv lossis ntau qhov chaw nres nkoj tsim qauv, kev nqis peev casting yog xav tau.
Tej yam yooj yim ib leeg-orifice nozzles tej zaum yuav machined los ntawm bar Tshuag, tab sis qhov ntawd ntog sab nraum qhov ntawm no casting phau ntawv qhia.
Dab tsi yog qhov feem ntau tsis ua hauj lwm hom ntawm denitrification nozzle castings?
Localized yaig ntawm cov tshuaj tsuag orifice ntug, ua raws li los ntawm corrosion-fatigue cracking pib los ntawm zais casting porosity los yog inclusion defects.
Puas yog stellite alloy nozzles tuaj yeem kho tom qab yaig?
Kev puas tsuaj me me tuaj yeem raug kho los ntawm hardfacing reclamation, tab sis kev kho qhov ua tau nyob ntawm qhov seem ntawm phab ntsa thickness thiab qhov chaw ntawm hnav.
Hnyav eroded los yog tawg nozzle castings feem ntau yuav tsum tau hloov.
