• •
• •
• •
•
•
•
•
•
•
•
1.FANSI NTHERMALPOWERPLANTS Ther o t o rc a nb epo wer e dt h r oughad r i v e rs u c hasamo t o r ,at ur bi nedr i v er ,orafl ui dο dr i v er . Ther o t ors y s t em c aus est hemo t i onoft h eai r / g asandt hec as i ngdi r ec t st heout pu t flow. Lar gec apac i t yf anuni t st y pi c al l yc ons i s tofabl aded,r ot at i ngi mpel l erenc l os edi na ο s t at i onar ycas i ng. Af a nc a nb ec o ns i d er e dame me c ha ni c a ld ev i c et h atmo v e sav o l u meof me ο fl ui ds uc hasai r ,g as ,orv a po rt hr oughapr e ss ur edr i v enfl ow.ο2 .Fa n 3.FanComp mponent s anax i al f anmov est heai rpar al l el t ot her ot at i onal ax i soft hei mpel l er .ο Ac ent r i f ugal f an mov est heai rper pendi c ul art ot her ot at i onal ax i soft hei mpel l er.ο Af ani scl as s i fi edbyt he di r ec t i onofi t sflo wt hr ought hebl adedpas s agesoft hei mpel l er .ο4 .T y p esofFa ns 5.Cent r i f ugal ( r adi al )FanBl adeTy pes Ci r c ul at et hegas esf orbet t erheatt r ans f erο Del i v erf uel t ot hebur ner sο Remo movepr oduct sof c o mb mb us t i o nο Suppl yai rr equi r edf orc ombus t i onο6.Func t i onofFansi nBoi l er Gas Ga r ec i r c ul at i onf ans . Pr i mar yai rf ans , I nduc eddr af tf ans , For c eddr af tf ans , .T y pe s ο ο ο ο7 ofPo werPl antFa ns The r ear ef ourmai nt y pesoff ansus edi nf os s i l po werpl ant s . Abal anc eddr a f ts y s t em us esbo t haf or c eddr a f tf ana tt hei n l e to ft hes y s t em an dan i nduc eddr af tf anatt heout l etoft heboi l ers ys t em.ο Dr af tf ansar egener al l yr es pons i bl ef or mai nt ai n i ngt hefl owofg as est hr o ug ht hebo i l er .ο8.Dr af tFans 9 .BOI L ERBo i l e rd r u m Re he at e rFi n al Su pe rPl a t e nSu pe rh ea t e rh ea t e rL T SHEc o no mi mi z e r Co al b un k e rWi n dBo xSe c o nd ar yP Ad u c ta i rd uc tF ur n a c eFl u eg a sAPHd uc tCo al f e ed e rF DFanPAFanCoalPul ver i zer Ty pi c al l y ,t hes ef ansar ec ent r i f ugal f ansut i l i z i ngr adi al ai r f oi l bl adi ngorv ar i abl epi t c hax i al f a n s . Th es ef ansar et y pi c al l yt hemo mo steffic i e ntf an si nt h epo werp l an tbe cau set he yha v e ο ο t hec l ea ne stoper at i ngen vi r o nment. For c eddr af tf ans( FD)s uppl yt heai rnec es sar yf or f uel c ombus t i onb ypu shi n gt h eai rt hr o ug ht hec ombu st i o nai rs uppl ys y st em andi nt ot he f ur n ac e. 0 .Fo r c edDr a f tFa ns ο1 I fgr eat erwearr es i s t anc ei snec es sar y , amodi fi edr adi al ,f or war dc ur v ed,orbac kwar di n cl i ne dbl adi ngcanbeus edatt heex pen seofeffic i enc yl os s .ο Th es ef a nsh an dl eho tfl u e gas ,t he yar egener al l ymo mor es us cept i bl et oer os i onandc or r os i onev enwi t hpar t i c ul at e r e mo mo v a l e qu i p me me nt( ESP) . I nduc eddr af tf ans( I D)ar epl ac edatt heout l etoft heboi l er ο s y s t e ma ndex ha us tal l gas eousc ombus t i onpr odu ct s ,orfl uega s,f r om t heb oi l e rb yc r ea t i ng anegat i v epr es sur eors uc t i onwi t hi nt hef ur nac e.ο1 1.I n du ce dDr a f tFa ns Col dPAf anst y pi c al l yar eai r f oi l c ent r i f ugal f ansormul t i s t ageax i al f anss i mi l art oFDf ans .ο APAf anups t r eam f r om t hepul v er i z er ,ora“ c ol d”PAf an,pus hest hec oal / ai rmi x t ur e t h r o ught h ep ul v e r i z e ra ndi smo mo s tc ommo nl yu s ed. Th es ef a nspr o vi deapos i t i v epr es s ur e ο ups t r eam oft hec oal pul v er i z erandhandl er el at i v el ycl eanai r.ο Pr i mar yai rf ans( PA)ar e hi ghpr es sur ef ansus edt os uppl yt heai rf ort het r ans por t at i onofc oal di r ec t l yf r om t he pul v er i z ert ot hef ur nac e. 2.Pr i mar yai rf ans ο1 St r ai ghtormodi fi edr adi al sorf or war dc ur v ed,bac kwar dl yi nc l i nedc ent r i f ugal wheel sar e appr opr i at ef orgas r ec i r c ul at i onf ans .ο Thedut ycy c l eofagasr ec i r c ul at i onf ani sv er y s t r i n ge ntd uet oh ea v yd us tl o ad sa nde x t r e met me e mp mp er a t u r ee x c ur s i o ns .ο Thes ef ansex t r a ct gasf r om t heec onomi z erout l etandt hepr eheat eri nl etandt hendi s char get hegasei t hert o
• • •
• • •
•
•
•
•
•
•
•
• • •
t hebot t om oft hef ur nac ef ors t eam t emper at ur ec ont r ol ort ov ar i ousl oc at i onsi nt he f ur n ac e. Gas r ec i r c ul at i onf ansar eus edt oc ont r ol s t eam t emper at ur e,f ur nac eheat ο abs or pt i on,ands l aggi ngofheat i ngs ur f ac es .ο1 3.Ga sRec i r c ul at i onFa ns 14 .PAF AN TOESPFDFANTOESPPA 15 .FL UEGASFROMAPH ESPI DFAN 16 .Dr af tSys t em 50 0MW SECONDFURNACEPASSFDFAN AHPAHPESPI DFAN +1 56 73mmwc l 522 1+36mmwc l mmwc l mmwc l mmwc l AHPESPSECONDChi mne y FDAHP FURNACEPASSFAN 17 .Ax i al Fl o w Fan 18.Ai r f oi l Bl adeCent r i f ugal Fan ο Vi br at i onwhi c har er es pons i bl ef ors er i ousandcos t l ymai nt enanc e.ο Cor r os i on, Er os i on, 9.DamageMechani smsMost commondamagemechani smsas soc i at edwi t h ο1 powerpl antf ansf ai l ur ear e: Th er a t eo fer o si o nd epe nd so ns u sp en de dp ar t i c l e s/fl yas h,i nt h efl ueg as .ο On eo ft h e mo s tc o mmo nd ama geme c ha ni s msas s o c i a t e dwi t hp owe rp l a ntf a nf a i l u r ei ser o s i o n,wh i c h i sr es pons i bl ef ors er i ousandc os t l ymai nt enanc e.ο20.Er os i on 21 .EFFECTOFBLADETYPEONEROSI ONRESI ST ANCEANDEFFI CI ENCYBLADE TYPETYPI CALMAXSTATI CTOLERANCETO EFFI CI ENCY(%)EROSI VE ENVI ROMEMTRADI AL7 0HI GHRADI ALTI P80MEDI UM TOHI GHBACKWARDL Y I NCLI NEDSOLI D85MEDI UMAI RFOI L9 0L OW Reduc i ngf ans peedands el ec t i ngaf anbl adet y pet hati smor er es i s t antt oer os i onwi l l s l o w do wnt heabr as i v ewal l t hi nni ngex per i enc edbyf anuni ts ur f ac e.ο Ther at eofer os i on e xper i enc edb yf ansus edi nhar s happl i c at i onsi sof t enc ont r ol l edbyt heus eofr epai r abl e l i ner s ,r epl ac eabl el i ner s ,orr enewabl ec oat i ngs .ο22.Res i s t antt oEr os i on Fanst h atope r at ei nflueg as ,s uc ha si nο23.Abr as i onRes i s t antI mpel l erduc eddr af tf ans ( I DF)f orc oal fi r edboi l er s ,ar er equi r edt ober es i s t antt oabr as i onbyas hi nt hefl uegas . •I nt er gr anul arc or r os i onο •Bi ol ogi c al c or r os i onο •Di ff er ent i al Ox y genat i onο •Ge ne r a l c or r os i on( was t ag e) •Pi t t i ngο •Gal v ani ccor r os i onο •Cr ev i c ec or r os i onο •Er os i on ο c or r os i onο Thef ol l o wi ngl i s ti st hemos tc ommont y pesofc or r os i onpr obl emsf oundi nboi l er po werp l a nt s . 4 .CORROSI ON ο2 •Bui l dupofmat er i al ont her ot or •I mpr oper l ydes i gnedorde t er i or at edf oundat i onsο • ο ο Mi s al i gnmentorb ents haf t •Cor r os i on,er os i on,hi gh/ l owc yc l ef at i gueeffec t sο •Ex ci t at i on ο ofar es onan tf r eq uen cyο •I mpr ope rc l ear anc eo fmo v i n gpar t s . •I mpr operLubr i c at i onο • Wo r n / d amag ed / c r a ck i n go ff a npa r t sο •Loosecomponent sο •I mpr o pe rb al anc i n gο Pos s i bl e r eas onsast owh yv i br at i onoc cur si nf anuni t sar el i s t edbel o w.ο25.Vi br at i on Af ant hati sr unwi t hav ar i ab l es peedmo t o rc a na dj u stt h es peedt oc ont r ol t heout putfl ow pr oper t i es. Mos tax i al f ansar eoper at edbyv ar i abl epi t c hax i al bl ades ,.ο Ac ent r i f ugal f an ο ο2 ut i l i z i ngi nl etv anescont r ol st heai r fl ow. 6.Ou t pu tAi rFl o w Co nt r o l 27.I nl etVanesofCent r i f ugal FanFAN 28.Var i abl eAi r f oi l Bl adi ngofanAx i al fl owFan •Mot orc ur r entanal y si sο •I nf r ar edt her mogr aph yο •No nd es t r u c t i v eex a mi n at i o n( NDE) ο • Oi l anal y si sο •Vi b r a t i o nme as ur eme nta nda na l y s i sο I ti nc l udest ec hnol ogi essuc hast he
•
•
•
• • •
•
•
f ol l owi ng: Co nd i t i o nmo ni t o r i n gi st h eu s eo fa dv a nc edt e c hn ol og i e st od et e r mi n ee qu i p me nt ο ο2 c ondi t i onand,pot ent i al l y ,pr edi c tf ai l ur e. 9 .CONDI TI ONMONI TORI NG Thes t ar t uppr oc edur es ,i naddi t i ont ot hec ont r ol sandi nt er l oc ks ,s houl df ol l owt he r e qu i r e me nt so fNFP A8 5. 0.ST ARTUPPROCEDURESOFDRAFTF ANS ο3 31 .FANS50 0MW BOI LERFAN FDFAN PAFANI DFANTYPEAXI ALAXI ALRADI ALNO perboi l er222FLOW , M3/ S251. 6184. 0574. 6PRESS, mmwc3 901200467TEMP, DEG C 4550150DRI VEMOTORMOTORMOTORSPEED, RPM 980148 0580MOTOR, KW 122 5 27 25395 0CONTROLV ARI ABLEPI TCHVARI ABLEPI TCH I NLETDAMPER+CONTROL CONTROLVFD 32 .FANS20 0MW BOI LERFANFDFANPAFANI DFANTYPEAXI ALRea c t i onRADI AL AXI ALi mpul seNO perboi l er222FLOW , M3/ S10575225PRESS,mmwcl 5101187 35 6TEMP, DEG C5050136 DRI VEMOTORMOTORMOTORSPEED, RPM 14801480 74 0MOTOR, KW 75 01 25 01 10 0 3 3.I DF ANu nd ere r e c t i o n5 00MW 3 4.Di s t r i b ut i o no fAu xPo we rCo n s ump t i o ni na2 1 0mwPo we rPl a ntF ANS I SO 58 01de fin est h eu pp erl i mi to ff a nsasapr e ss ur ei n cr e as eof1 20i n ch esWg( 3 0k Pa ) .ο ASMEPT C1 1,“ Pe r f o r ma nc eT es tCo def o rF an s , ”d efi n esaf a na spr o v i d i n gac omp r e s s i o n r at i oo f1 . 1o rade ns i t yc hang eof7%. Fansar esi mi l art oc ompr es sor s ;t hedi ff er enc ei s ο t h atf a nsc r e at eaflo wo fg aswh er e asc ompr e ss o r si n cr e as et h epr e ss u r eo ft h eg as .ο3 5 . Di ffer encebet weenf anandCompr essor ο ASMEPTC11ο 4.AMCA203,Fi el dPer f or manceMeasur ement s. 3.AMCA202, Fan Appl i c at i onMa nua l . 2.AMCA8 03 ,Si t ePe r f o r ma nc eT es tSt a nd a r d .ο 1 .NFPA85 ,Bo i l e r ο andCombust i onSys t em Hazar dCode. 6 .STANDARDS ο3 37 .THANKI NG YOU
