d 1.1 sg writeup-4783a150506

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NO.

TCE-4857A-C-

JSW ENERGY (VIJAYANAGAR) LIMITED

2 x 300MW COAL BASED THERMAL POWER STATION AT

TORANAGALLU, BELLARY (KARNATAKA)

VOLUME – II Part -

IISECTION: D1.1

SHEET 1 OF 25

STEAM GENERATOR AND AUXILIARIES

ISSUE

R0

1.0 DESIGN REQUIREMENTS

General

1.1 The steam generator shall be designed for S!C" #a$a#it% s$e#ified in&ata sheet ' A1 and for b(rning 100) #oal. The *idder shall offer dr(mt%$e steam generator of $ro+en design.

1., The steam generator and its a(iliaries shall be designed for o(tdoor installation.

1. The steam generator (nit shall be #a$able of o$erating either on #onstant$ress(re or sliding $ress(re mode. The load range for the sliding $ress(re(nit o$eration /o(ld be from 0) steam generator maim(m #ontin(o(srating S!C" to 100) T!C".

1.4 The steam generator shall be designed to meet the 2ndian *oiler "eg(lations 2*" re3(irement. here+er 2*" is not s$e#ifi# abo(t materialdesign man(fa#t(re ins$e#tion and testing re3(irements AS!E #ode shallbe (sed.

Steam Generator Struture

1.5 The steam generator str(#t(re shall be designed to s($$ort all loadslo#ated on the str(#t(re. 2n addition other loadings ma% be introd(#ed onthe str(#t(re from $i$ing en#los(res ad6a#ent str(#t(res and e3(i$ment.

!urnae

1. The f(rna#e shall be designed s(#h that the heat release rates shall note#eed the +al(es s$e#ified in &ata Sheet-A1 at 100) steam generator maim(m #ontin(o(s rating S!C" #ondition. The distan#e bet/een#entre line of bottom most #oal b(rner and f(rna#e ho$$er /oring $ointshall be not less than metres. The #onfig(ration of the f(rna#e shall bes(#h that flame im$ingement on an% se#tion of the f(rna#e is a+oided o+er the entire load range.

1.7 The f(rna#e shall ha+e ho$$er bottom /ith stainless steel seal $latess(itable for #onne#tion to a /ater im$o(nded ash ho$$er. A s(itable sealingarrangement for #onne#ting to a /ater im$o(nded ash ho$$er shall also be$ro+ided. The #lear /idth of the ho$$er throat shall not be less than1100mm. The distan#e bet/een f(rna#e o$ening and the grade le+el shallbe 7.5 m.

1.8 9ield /elds in large diameter thi# /alled headers or $i$es shall be a+oidedto the etent $ossible.

1.: ;ro+ision shall be made for the f(t(re installation of additional soot blo/ersin the f(rna#e.

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IISECTION: D1.1

SHEET 2 OF 25


ISSUE

R0

1.10 Obser+ation $orts shall be designed to $re+ent infiltration of air into the(nit.

"a#$n%

1.11 A gas tight en#los(re shall be designed for the entire steam generator fromthe lo/er f(rna#e to the e#onomiser eit. 2n areas /here /elded /all#onstr(#tion is (sed no sin #asing is re3(ired b(t sin #asing of steel$lates shall be (sed for all en#los(res and behind all /ide s$a#ed t(bes/here refra#tor% is (sed. 9rames shall be f(rnished aro(nd all o$enings inthe steam generator designed to allo/ for e$ansion bet/een the /elded

/all or inner sin #asing and an o(ter al(min(m lagging. The al(min(mshall be of ribbed t%$e and shall be minim(m 1., mm thi#.

Steam an& Water S'#tem

1.1, The steam and /ater s%stem shall be as $er en#losed s#heme no.TCE.4857A-510-S

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IISECTION: D1.1

SHEET 3 OF 25


ISSUE

R0

($ sh(tdo/n and load #hanges. The CONT"ACTO" shall s$e#if% in thetender the maim(m $ermissible dr(m metal tem$erat(re differential andthe #orres$onding maim(m $ermissible rate of $ress(re and tem$erat(re#hanges d(ring start-($ sh(tdo/n and load #hanges.

Suereater an& Reeater

1.18 The s($erheater and reheater shall be of $ro+en design and shall bedesigned to maintain s($erheat and reheat steam tem$erat(res ats($erheater and reheater o(tlet o+er the entire steam tem$erat(re #ontrolrange i.e. from 0) T!C" to 100) S!C" rating as s$e#ified in &ata

Sheet-A1 (nder the follo/ing #onditions> -ith the steam generator heat absor$tion s(rfa#e #ondition +ar%ingfrom #lean ($to normall% e$e#ted and $ermissible fo(ling limits?

-ith minim(m $ossible (se of de-s($erheating s$ra%?

- ith $ermissible and normall% e$e#ted (nbalan#e or stratifi#ation infl(e gas flo/?

- ith all s$e#ified modes of f(el b(rning.

1.1: The s($erheater and reheater elements shall be arranged to ens(re the(niform steam distrib(tion and steam tem$erat(re +ariation of not greater

than ±10oC a#ross the /idth of the steam generator at all o$erating

#onditions and loads.

1.,0 The attem$erators are to be of s$ra% t%$e fitted /ith an inner remo+ablelining so arranged that the lining #o(ld be remo+ed readil% /itho(tre#o(rse to etensi+e #(tting of the #onstr(#tion /elds. Am$le $ro+isionshall be allo/ed to enable internal ins$e#tion of the +essel b% means of theintras#o$e. Com$lete s($erheater and reheater tem$erat(re #ontrols%stem /ith ne#essar% $i$ing? blo# #ontrol isolation and #he# +al+esand instr(mentation @ #ontrols shall be $ro+ided.

1.,1 The s($erheater and reheater s($$orts or hangers e$osed to hot gases/ithin the setting shall be of a heat-resisting material s(itable for long life(nder the ser+i#e #ondition.

1.,, A(iliar% steam ta$-off #onne#tion for soot blo/ing shall be either fromintermediate s($erheater header or from #old reheat line or from a(iliar%steam header. 2n #ase the steam is ta$$ed off from the #old reheat line or from a(iliar% steam header the CONT"ACTO" shall f(rnish a list of installation /here s(#h s%stems are in +og(e and also the same shall berefle#ted a$$ro$riatel% in the t(rbine #%#le heat balan#e diagrams.

S(itable allo/an#e shall be $ro+ided for the s($erheater and reheater t(bes to #o(nter the erosion #ondition.

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IISECTION: D1.1

SHEET 4 OF 25


ISSUE

R0

Eonom$#er

1., 2t shall be ens(red that the e#onomiser design $ress(re e#eeds the steamgenerator design $ress(re b% an amo(nt of at least e3(al to the $ress(redro$ fri#tion and stati# thro(gh the e#onomiser at the 100) S!C"#ondition.

1.,4 The e#onomiser shall be of non-steaming t%$e and shall ha+e $ro+ision for re#ir#(lation of /ater /hile starting the (nit. The e#onomiser t(be bansshall be of in line design. The design of the e#onomiser shall be s(#h that

the t(be elements #an be easil% re$la#ed /hen ne#essar%. S(itableallo/an#e shall be $ro+ided for the e#onomiser t(bes to #o(nter theerosion.

*ea&er#

1.,5 All headers in high tem$erat(re gas $ath shall be lo#ated o(tside the gas$ath. The handhole o$enings in headers shall be so lo#ated as to $ro+ides(itable a##ess to maintenan#e and ins$e#tion. All handhole $lates shall bedesigned for seal /elding.

1., The header +ents drains $ress(re ga(ges steam and safet% +al+e

#onne#tions shall be of /eld-end t%$e. 2nstr(ment as re3(ired in#l(ding test#onne#tions shall be $ro+ided.

1.,7 All headers shall be thoro(ghl% #leaned and be free of s#ale b% shotblasting on the inside.

1.,8 All +al+es that re3(ire o$eration d(ring start-($ or sh(tdo/n of the steamgenerator shall be ele#tri# motor o$erated e#e$t as s$e#ifi#all% statedother/ise. All motor a#t(ators shall be designed to meet the tor3(ere3(irement d(e to maim(m differential $ress(re. 2n addition to thesemotorised +al+es an% other ser+i#e /hi#h #alls for motor o$eration shallbe motorised and those motorised +al+es shall be listed in the bid.

1.,: &rains from steam dr(m headers ga(ge glasses and integral $i$ing of steam generator shall be terminated into one or more drain #olle#tionheaders /hi#h /ill be #onne#ted to 2*& tan. 2*& tan +ent shall beliberall% si=ed to a+oid $ress(risation and shall be terminated metersabo+e the steam generator roof.

1.0 9a#ilit% for draining the steam dr(m d(ring emergen#% /hen the steamgenerator is in o$eration shall be $ro+ided. The +al+es shall be f(rnished/ith motor dri+e. The drain shall be led to 2*& thro(gh a drain #olle#tionheader. The ta$ off $oint for emergen#% drain sho(ld be at normal dr(mle+el. All blo/do/n +al+es shall be s(itable for $assage of a#id /ash d(ring

a#id #leaning.

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IISECTION: D1.1

SHEET 6 OF 25


ISSUE

R0

1.8 Silen#er shall be $ro+ided at the inlet of 9& and ;A fans /ith /eather hoodand inlet s#reen.

1.: S(itable braing arrangement shall be $ro+ided to 2& fan so that /ith thedri+ing motor s/it#hed-off the fan #ontin(es to t(rn at lo/ s$eed (nder theinfl(en#e of #himne% dra(ght.

1.40 An ade3(ate n(mber of inter#onne#ting isolating and #ontrol dam$ers /ithdri+es shall be $ro+ided on all #old air hot air seal sir and fl(e gas d(#ting

before and after e3(i$ment on these s%stems to $ermit $ro$er o$erations.The #ontrol dam$ers shall be $ne(mati#all% o$erated and isolation dam$ersshall be ele#tri#all% o$erated.

1.41 The gas and air d(#ts shall be designed for /ind loads as s$e#ified for thesteam generating (nit $ro$er and their o/n /eight in#l(ding fl% ash load/hi#h ma% get de$osited at the d(#t bottom ins(lation and lining. The to$of the d(#ts shall be #ro/ned to ens(re $ro$er drainage.

1.4, The d(#t/or shall be free to e$and b(t it shall be rigid against /ind andseismi# dist(rban#es. Ade3(ate $ro+ision shall be made for all e$e#tede$ansion or #ontra#tion.

1.4 All gas and air d(#ts shall be designed to ens(re (niform distrib(tion of gasand airflo/ to the +ario(s $ortions of the (nit. These d(#ts shall #onsist of t(rning +anes baffle $lates stiffening de+i#es e$ansion 6oints interior bra#ings a##ess doors and bra#ets s($$ort str(#t(res and hangers asne#essar%.

1.44 Aerofoils shall be $ro+ided in the air d(#ts for the meas(rement of totalairflo/.

1.45 Bo#ing de+i#es shall be $ro+ided to dam$ers to $ermit lo#ing in both o$enand sh(t $ositions.

1.4 Ele#tri#al o$erated g(illotine t%$e isolation dam$ers along /ith dri+es shallbe $ro+ided as s$e#ified in &ata sheet-A1. The inlet dam$ers for 2& fansshall be lo#ated in hori=ontal d(#t of main inlet d(#t to a+oid fl% ash b(ild ($/hen in #losed $ositionthe same /ill be tae #are s(itabl% d(ring detailedengineering b% SEC.

1.47 The fl(e gas d(#t la%o(t shall be designed #onsidering the follo/ingas$e#ts>

- The #hange of dire#tion of fl(e gas d(#t shall be grad(al to a+oidash #olle#tion at the bottom of the d(#t and also to $re+ent erosionb% lo#al #on#entration of fl% ash.

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IISECTION: D1.1

SHEET OF 25


ISSUE

R0

- The n(mber of dire#tion #hanges of the fl(e gas d(#t shall beminimal to minimise the ash #olle#tion $oints.

- o/e+er the air $reheater e#onomiser and d(#t ho$$ers shallha+e $ro+ision for remo+al of fl% ash d(ring maintenan#e $eriod/hen the steam generator is o(t of o$eration. To fa#ilitate s(#h fl%ash remo+al a 100) gas tight isolation gate near the ho$$er bottom shall be $ro+ided. The ho$$er bottom shall be blaned /ith

a blind #h(te s(itable for (nloading fl% ash from all the abo+ementioned ho$$ers.

Du#t +re$$tat$on an& "ollet$on S'#tem

1.48 One ele#trostati# $re#i$itator ES; shall be $ro+ided for the steamgenerator. The ele#trostati# $re#i$itator shall be designed to limit the d(st#on#entration as s$e#ified in &ata Sheet ' A1. ES; shall be #om$lete /iths($$orting str(#t(ral frames #olle#ting and dis#harge ele#trodes shaftins(lators b(sh ins(lators inde$endent ra$$ing s%stem for #olle#ting anddis#harge ele#trodes /ith a(tomati# ra$$ing #ontrols high +oltagetransformers re#tifiers b(s se#tions /ith se#tionalising and gro(nding

s/it#hes and #ontrols fl% ash #olle#ting ho$$ers /ith a##essories et#. AnEnerg% !anagement S%stem E!S shall be $ro+ided to o$timise the$o/er #ons(m$tion. The *idder shall f(rnish the details of E!S.

1.4: A##ess doors and $latforms and #orres$onding interior /al/a%s shall be

$ro+ided on ea#h side of the #asing before and after ea#h of the fields inseries at the bottom and mid $oint ele+ations of the #olle#ting ele#trodes inorder to fa#ilitate maintenan#e and ins$e#tion of ea#h of the fields.

1.50 9or $ersonnel $rote#tion e% interlo#s shall be $ro+ided to $re+ent the

o$ening of an% ins$e#tion andor a##ess doors (ntil after de-energising of all high +oltage e3(i$ment that #an be rea#hed andor made #onta#t /ith

thro(gh the ins$e#tion andor a##ess door.

1.51 Ea#h ho$$er shall be $ro+ided /ith a #on+enientl% lo#ated 150 mm in#h$i$e ni$$le fitted /ith a 3(i# remo+able hinged #a$ lo#ated near ho$$er o(tlets to fa#ilitate emergen#% $oing.

1.5, 2f the !AND9ACTD"E"s standard design is s(#h that the roof is $ier#ed/ith ra$$er rods high +oltage s($$ort ins(lators or other #om$onents/hi#h /o(ld re3(ire eternal ins(lation and /eather-$roofing be installedhe shall $ro+ide a $entho(se/eather en#los(re to be ere#ted on$re#i$itator roof. e shall also $ro+ide al(mini(m g(tters and a 100 #m high,-rail safet% handrail.

1.5 ;entho(se/eather en#los(res shall be +entilated b% ele#tri# motor dri+en

fans. The transformer re#tifier sets #ontrols et#. m(st be e$t /ithin

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IISECTION: D1.1

SHEET ! OF 25


ISSUE

R0

a##e$table tem$erat(re limits (nder all o$erating #onditions /ith maim(mambient tem$erat(re. The fans shall be /all mo(nted eha(st from insidethe $entho(se to the o(tside and be $rote#ted /ith rain lo(+ers.

1.54 The hoist to $ermit eas% remo+al of ea#h transformer-re#tifier from itso$erating $osition to grade le+el shall be $ro+ided.

1.55 The ra$$ing s%stem shall be designed for sele#ti+e remote a(tomati# or man(al o$eration at ad6(stable inter+als. Ne#essar% ra$$ing arrangement/ith #ontrols shall be $ro+ided for $erforated gas distrib(tion $late at inletto and o(tlet from the ES;.

1.5 Eletr$al S'#tem o, ES+

Tran#,ormer Ret$,$er E-u$ment

1.5.1 These shall be s(itable for indooro(tdoor installation. The transformer re#tifier assemblies shall be designed for ele#trostati# $re#i$itator ser+i#eand shall be for single-$hase energisation /ith sili#on re#tifiers #onne#tedfor $(lsating negati+e $olarit% do(ble half/a+e o$eration. !eans shall be$ro+ided for #hanging to f(ll /a+e o$eration if fo(nd desirable for an%reason thro(gh eternal s/it#hing. The a##ess door to the lins re3(iredfor #hanging the high +oltage #onne#tions or the high +oltage s/it#ho$erating me#hanism or #o+er sho(ld be arranged for lo#ing /ith a

$adlo#.

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IISECTION: D1.1

SHEET " OF 25


ISSUE

R0

transformer $rimar% #onne#tions re#tifier $ositi+e terminals and gro(ndterminal. A #at#h basin is $ro+ided in the e+ent of a tan fail(re.

1.5. All sili#on re#tifier #ells shall be #onser+ati+el% rated for #om$atibilit% /ithmaim(m #ir#(it load and demands re3(irements.

1.5.7 2f re3(ired s(itable lo/-loss im$edan#e shall be in#l(ded in the high +oltage

#ir#(it to limit #ir#(it #a$a#itan#e dis#harge #(rrent to +al(es #om$atible/ith #(rrent rating of the re#tif%ing elements (sed.

1.5.8 T/o high +oltage b(shings negati+e $olarit% shall be #onne#ted to the

o(t$(t of the re#tifier and mo(nted on to$ of the tan #o+er. *(shings shall

be #onser+ati+el% rated for the o$erating #onditions and test and shallha+e s(itable #onne#tions to s($$ort #onne#tion arrangement of b(s or #able.

1.5.: igh +oltage b(s r(ns shall be ade3(atel% s($$orted and $rote#ted b%d(#ts. A 150-mm ,00-mm minim(m o$ening /ith gaseted #o+er shall be$ro+ided at the transformer re#tifier high +oltage terminals for gro(ndingthese terminals d(ring ins$e#tion and maintenan#e. 9a#ilit% for #learl%seeing the gro(nding s/it#h #onta#ts at the high +oltage terminals beforeremo+ing the #o+er shall be $ro+ided.

1.5.10 2n the e+ent of ar#ing the filter +oltage shall be s/it#hed off for se+eral half

#%#les to ens(re a satisfa#tor% etin#tion of the ar#. 2f d(st bridging or metalshort #ir#(its o##(r in the $re#i$itator the $re#i$itator short #ir#(it #(rrentshall be limited to the rated #(rrent of the installation and dis#onne#ted#om$letel% after the e$iration of a gi+en time.

1.5.11 S($$orting ins(lators shall be lo#ated in heated #om$artments that aremaintained abo+e the de/ $oint of the fl(e gas. The% shall be lo#ated o(tof the dirt% gas stream. These shall be $rote#ted from /eather b% either a#ommon to$ ho(sing or indi+id(al #om$artments. A steel shro(d belo/ theins(lator ma% be $ro+ided /hi#h /ill f(rther inhibit d(st diff(sion. Ea#h#om$artment shall be $ress(rised and +entilated b% heated filtered air f(rnished b% one or motor dri+en blo/ers. Conta#tors and stri$ heaters /ith

#ontrol thermostats for heating the air blo/er motors and blo/er motor #onta#tors and #ontrol for ea#h #om$artment as re3(ired for #om$letehand a(tomati# o$eration /ith alarm #onta#ts for high and lo/tem$erat(res and loss of $ress(re shall be $ro+ided. The filters shall be of the /ashable t%$e ade3(atel% si=ed for (se in d(st% atmos$here.

1.5.1, 2f stri$ heaters are (sed the /iring to the stri$ heater terminals shall beni#el-$lated #o$$er /ith 00-+olt teflon-glass ins(lation.

"ontrol "u.$le#

1.5.1 A(tomati# #ontrol #(bi#les shall be f(rnished for indoor mo(nting. Dnitsshall be of the high-s$eed sili#on #ontrolled re#tifier or magneti#-am$lifier t%$e designed to maintain the o$tim(m ;re#i$itator +oltage and #(rrent f or

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IISECTION: D1.1

SHEET 10 OF 25


ISSUE

R0

+ariations in rate of gas flo/ and $arti#le #ontent and /ith sim(ltaneo(ss($$l% +oltage +ariations of $l(s or min(s 10). The a(tomati# #ontrolsshall ha+e f(ll #ontrol from 10) of the $o/er set rating to f(ll rating.

The #ontrol s%stem sho(ld be #a$able of>

a E+al(ating s$aring b% intensit% and /a+e sha$e.

b "eg(late $o/er at the threshold of s$arling.

# *rea a $o/er ar# /ithin aro(nd ten- 10 milli se# of its o##(rren#e.

d A(tomati#all% #ontrol the ar# res$onse so that $o/er is restored /ithinaro(nd one h(ndred t/ent% 1,0 milli se#s. And

e !odif% the #(rrent /a+e sha$e $ermitting greater $o/er in$(t $rior torea#hing s$ar o+er threshold.

Control #(bi#les shall generall% #onfirm to S$e#ifi#ation as s$e#ified. 1.5.14 Com$lete #ontrol and interlo# s%stem to a(tomati#all% reg(late and

monitor for safe o$eration of the ES; shall be $ro+ided.

1.5.15 ;ro+ision shall be made in ea#h #(bi#le for a(to-man(al o$eration. The

#ontrol #ir#(it shall be so arranged that /hen the latter s/it#h is in man(al$osition the ES; #ontrol room o$erator shall be able to #ontrol the ele#tri#al$erforman#e of the ES; b% means of a #ontrol s/it#h $otentiometer or +ariable transformers. hen the s/it#h is in the a(to $osition thea(tomati# reg(lator (nit lo#ated in the #ontrol #(bi#le shall #ontrol the$erforman#e of the ES; in a##ordan#e /ith its re3(irements and settings of the reg(lator. !an(al ad6(stments of high +oltage set $oints shall be$ro+ided.

1.5.1 Ade3(ate n(mbers of indi#ating instr(ments shall be $ro+ided on the#ontrol #(bi#les for the $(r$ose of #orre#t monitoring of the $erforman#e of ES; and a##essories.

1.5.17 S(ffi#ient n(mbers of alarms shall be $ro+ided on the #ontrol #(bi#les.

1.5.18 "a$$er #ontrol s%stem for ea#h b(s se#tion or $airs of b(s se#tionsser+ed b% a single transformer-re#tifier shall > a ;ro+ide man(al ad6(stments of the timing and fre3(en#% of o$eration

and the ra$$ing intensit% from the #ontrol #abinets

b ;ro+ide ra$$er diagnosti# s%stem in#l(ding miniat(re indi#ating lightsdigital indi#ators et#.

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IISECTION: D1.1

SHEET 11 OF 25


ISSUE

R0

Motor#

1.5.1: &ri+e motors of the ra$$ing me#hanism for #olle#ting and dis#hargeele#trodes and fans shall #om$rise 415F $hase 50 = rated dire#t-on-line ind(#tion motors /ith 2;-55 en#los(re.

2n general motors shall #onform to S$e#ifi#ation as s$e#ified.

1.5.,0 Ea#h motor shall be #onne#ted to its s($$l% b% means of a f(ll +oltage#ombination magneti# starter /hi#h shall in#l(de a mo(lded #ase #ir#(itbreaer or s/it#h @ "C #artridge lin t%$e f(ses for the o+er-#(rrent andshort #ir#(it $rote#tion. All motor starters heater #onta#tors et#. shall be

mo(nted in their res$e#ti+e #ontrol #abinets. Bo#ation of motors shall bes(#h that the% are easil% a##essible for an% re$air or maintenan#e. 1.57 All #om$onents feat(res and design $arameters of the ES; s$e#ified

herein shall be #onsidered as the minim(m re3(irements. 2f the!AND9ACTD"E"S design di#tates that these minim(m re3(irements bee#eeded to meet s$e#ified $erforman#e g(arantee and to $ro+ide a safereliable o$erating (nit he shall in#l(de in his *id $ri#e of all ne#essar%e3(i$ment and feat(res be%ond these minim(m re3(irements. All a##essories and a$$(rtenan#es re3(ired for a #om$lete and o$erable$re#i$itator installation /hether or not the% are s$e#ified herein shall be$ro+ided.

1.58 The CONT"ACTO" shall o$timise gas flo/ $attern and distrib(tion in the$re#i$itator se#tions.

1.5: The storm /ater drain $i$ing shall be $ro+ided ($ to the grade le+els for

ES;.

Start/u0Warm/u O$l S'#tem

1.0 The start-($/arm-($ oil s%stem shall be as $er the en#losed s#heme no.TCE.4857A-S

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ISSUE

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Suort O$l S'#tem

1. The s($$ort oil s%stem shall be as $er the en#losed s#heme no.TCE.4857A-510-S

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1.71 The #oal firing s%stem shall be designed to meet the re3(irement of steamgenerator at 100) S !C" #ondition /ith /orst #oal as indi#ated in thes$e#ifi#ation.

1.7, The #oal $(l+erising and firing s%stem shall #onsists of medi(m s$eed #oalmills /ith dri+es #oal feeders /ith dri+es #oal isolation gates at b(ner o(tlet feeder inlet #oal $i$ing /ith fleible #o($lings from mill o(tlets to#oal b(rners #oal b(rners /ith sh(t-off gates and dri+es air registers /ithdri+es #oal mill hot air and #oal air dis#harge isolation gates and dri+est/o , 100) seal air SA fans #om$lete /ith air d(#ting to all #oalmillsfeeders isolation inter#onne#ting and #ontrol dam$ers on seal air

d(#ting as re3(ired ins(lation s($$orts and hangers et#.

1.7 9or#ed oil l(bri#ation s%stem for the #oal mills and motors shall #onsist of , 100) oil $(m$s ea#h /ith motor , 100) oil #oolers and filters et#. /ithne#essar% $i$ing and +al+es.

1.74 The n(mber and #a$a#it% of #oal mills and feeders shall be sele#tedbased on the follo/ing >

a ith one mill as standb% and other mills r(nning at 85) of their !C"the s%stem shall be able to meet 100) #oal firing rate (sing /orst#oal. Also /ith t/o mills as standb% 100)S!C" shall be met (sing

design #oal.b !inim(m three mills shall be in o$eration for load range of 0)T!C" to 100) S!C".

# Ea#h #oal mill shall be $ro+ided /ith a se$arate gra+imetri# #oal

feeder and its #a$a#it% shall not be less than the #a$a#it% of the #oalmill

1.75 &am$ers shall be $ro+ided on #oal $i$es at mill o(tlet on #old air and sealair d(#ts and gates on hot air to #oal mills. These gates dam$ers shall beof man(all% o$erated t%$e.

1.7 The CONT"ACTO" shall 3(antif% the o$erating ho(rs bet/een ma6or

o+erha(ls of the #oal mill and the #oal thro(gh$(t in tonnes /hen handling/orst #oal. The #oal mills shall be designed for dire#t firing and to $(l+erisera/ #r(shed #oal a+ailable from the #oal #r(sher.

1.77 Sealing Air SA fans shall deli+er air into a #ommon seal air header from/here ea#h #oal mill and feeder set shall be s($$lied /ith the seal air.

1.78 9or dra/ing #oal sam$les iso ineti# sam$ling of #oal for testing thefineness of the gro(nd #oal a minim(m of fo(r ta$$ing $oints at rightangles to ea#h other shall be $ro+ided on the straight length of $i$e at ea#h#oal mill o(tlet. Com$ressed air $(rging #onne#tions shall be $ro+ided atthe ta$$ing $oints to #lear the o$ening $rior to sam$le #olle#tion.

1.7: Coal isolation gates shall be $ro+ided at ea#h b(ner o(tlet. The gatesshall be of d(st-$roof ra# and self-#leaning t%$e $inion /ith all $arts in

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ISSUE

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#onta#t /ith #oal of minim(m t%$e 410 /eldable stainless steel. The gatesshall be $ro+ided /ith #hains for hand o$eration.

1.78 !an(al isolation gates shall also be f(rnished in ea#h #oal b(rner $i$e atthe /ind-bo for fa#ilitating on-line maintenan#e /or of #oal $i$ing#oalmill.

1.7: The #oal feed $i$e from the #oal mills to the #oal b(rners shall be of /ear resistant /eldable steel and of minim(m thi#ness not less than 1, mm onstraight length and ,0 mm b(t not less than one and a half times thestraight $i$e thi#ness at o(ter radi(s of bends. The bends shall be basaltlined or #erami# lined to $re+ent erosion.

1.80 Ea#h $i$e bet/een b(ner o(tlet and feeder inlet shall be $ro+ided /ith aflanged filler $ie#e for #onne#tion of an angle t%$e di+ertor #h(te to $ermitemergen#% d(m$ing of #oal from the b(ners. One #arbon steel di+ertor #h(te #onne#tion $ie#e /ith flanged o(tlet shall be f(rnished.

1.81 A dresser or e3(al #o($ling shall be $ro+ided on ea#h feeder inlet to $ermitb(ner and feeder e$ansion mo+ements. The inner ring shall be of stainless steel.

1.87 Ade3(ate and s(itabl% lo#ated $oe holes shall be $ro+ided to #lear thefeed $i$es to the mills /hen the% get #hoed.

1.8, The *idder shall also 3(ote for slo/ s$eed ball and t(be mills o$tion. The*idder shall f(rnish the details of this o$tion in his bid.

M$ll re2et oer

1.83The !ills re6e#ts ;%rites dis#harged b% the !ills shall be #olle#ted in theres$e#ti+e !ills $%rites ho$$er. The $%rites ho$$er shall be $ro+ided /ithisolation +al+es dam$ers s(#h that the +al+e /ill o$en a(tomati#all% after a$re-set /eight of the re6e#ts for f(rther #on+e%an#e. The arrangement of themill re6e#t ho$$er gates shall be s(#h that at all times atmos$heri# air shallnot be ingressed into the s%stem.

I%n$t$on S'#tem

1.84 igh Energ% Ar# EA ignitors shall be $ro+ided to ignite B&O and 9O.One EA ignitor for ea#h f(el oil g(n shall be $ro+ided. The ignitor s%stemoffered shall be of /ell-$ro+en design of re$(ted mae.

1.85 2gnition s%stem shall be #om$lete /ith all-ele#tri#al gadgets +i=.transformer #ontrol #abinets ignitors #abling et#. to mae the s%stem#om$lete b% itself and shall be integrated /ith *!S.

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ISSUE

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1.8 Ade3(ate n(mber of flame s#anners shall be $ro+ided for f(el oil and #oalfiring. T/o , 100) one AC and one &C motor dri+en s#anner air fansshall also be $ro+ided for the flame s#anner #ooling.

3lo4 Do4n S'#tem

1.87 The blo/ do/n s%stem shall #onsist of #ontin(o(s blo/do/n C*& tanand intermittent blo/do/n 2*& tan all $i$ing headers +al+es s($$ortsand hangers ins(lation et#. 9rom steam dr(m to C*& tan all $i$ingheaders +al+es s($$orts and hangers ins(lation et#. from C*& tan to

2*& tan and C*& tan le+el #ontrol s%stem and instr(mentation. The C*&le+el #ontrol s%stem shall be #om$lete /ith drain #ontrol +al+e. All $i$ingheader +al+es s($$orts and hangers ins(lation et#. for emergen#% blo/do/n from steam dr(m to 2*& tan shall also be in#l(ded.

1.88 The C*& tan shall be designed to a##e$t the #ontin(o(s drain from thesteam dr(m for the $(r$ose of #ontrolling the dissol+ed solids in dr(m/ater. The C*& tan shall ha+e etra thi#ness at and aro(nd the $oint of entr% of dr(m /ater.

Soot 3lo4$n% S'#tem

1.8: The soot blo/ing s%stem shall #onsist of motor o$erated steam sootblo/ers of the rotar% and retra#table t%$e /ith dri+es $ress(re red(#ingisolation and relief +al+es steam tra$s thermal drain +al+es #om$lete$i$ing s($$orts and hangers ins(lation motor #ontrol #enters and sootblo/er instr(mentation and #ontrol s%stem. The s%stem shall be of self-draining t%$e. The *idder #an #onsider #on+entional t%$e of soot blo/ings%stem. The *idder shall 3(ote for alternati+e of HSmart soot blo/ings%stemI lo/er #ons(m$tion of steam @ less erosion soft/are basedsele#ti+e soot blo/ing and f(rnish details of the same along /ith his bid.

1.:0 The soot-blo/ers shall be s(itable for remote a(tomati# se3(ential and

lo#al o$eration.

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ISSUE

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Au5$l$ar' Steam S'#tem

1.:1 A(iliar% steam s%stem shall #onsist of one 1 a(iliar% $ress(re red(#ingstation ;"S and a des($erheater on the steam line ta$$ed off from themain steam line !SB as sho/n in the en#losed flo/ diagramno.TCE.4857A-S

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ISSUE

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Au5$l$ar' "ool$n% Water

1.: An a(iliar% #ooling /ater s%stem shall be s($$lied for the S (nit. Thes%stem shall #onsist of #om$lete $i$ing to all e3(i$ment re3(iring #ooling/ater. Ea#h #ooler bearing shall be s($$lied /ith isolating +al+es at theinlet and throttling t%$e +al+es at the o(tlet.

SG !$ll +um

1.:7 One 1 S fill $(m$ shall be s($$lied. The S fill $(m$ shall dra/ /ater from the #ondensate storage tan CST and fill the S (nit before start-($.The CONT"ACTO" shall $ro+ide S fills #onne#tion to the S (nit at

e#onomiser and s($erheater drain headers. 2n addition the fill $(m$dis#harge shall be #onne#ted to deaerator feed storage tan and ACstorage tan also. The #a$a#it% of the fill $(m$ shall be eno(gh to fill theS (nit in abo(t 11, ho(rs time.

V$.rat$on an& No$#e Le1el#

1.: The design of steam generator and its a(iliaries shall ens(re maintenan#eof +ibration and noise le+els /ithin the limits s$e#ifiedin the follo/ing $aragra$hs o+er the entire o$erating range and d(ring loadfl(#t(ations.

1.:7 The gas $ath design shall $re+ent the generation of e#itation for#es

#ond(#i+e to resonant +ibration.

1.:8 9& 2& ;A and #oal mills shall be $ro+ided /ith +ibration isolation s%stems$ring mo(nted or #on+entional blo#frame t%$e "CC fo(ndation #an be$ro+ided.

1.:: Fibration at the bearings of 9& 2& ;A and #oal mills shall meet there3(irements of F&2-,05 !a#hine ro($ K 3(alit% #lass Kood.

1.100 The CONT"ACTO" shall $ro+ide +ibration isolators of $ro+en $erforman#efor $re+enting transmission of +ibrations from one e3(i$ment to the other neighboring e3(i$ment and str(#t(res.

1.101 The d(#ting shall be ade3(atel% stiffened to absorb $ress(re $(lsations.(ide +anes shall be $ro+ided at bends as re3(ired to $re+ent t(rb(len#e.(ide +anes in the gas d(#t shall be $ro$erl% designed to minimiseerosion. 9an ind(#ed d(#t +ibrations shall be a+oided.

1.10, The meas(red noise le+el $rod(#ed b% an% rotating e3(i$ment shall note#eed 85 d*A at a distan#e of 1.0 m from its bo(ndar% in an% dire#tion(nder an% load #ondition.

1.10 The noise $rod(#ed in +al+es and $i$ing asso#iated /ith handling#om$ressible and in#om$ressible fl(ids shall be atten(ated to 85d*A at adistan#e of 1.0 m from the so(r#e b% the (se of lo/ noise trims baffle $late

silen#ersline silen#ers a#o(sti# lagging ins(lation thi#-/alled $i$e /oras and /here ne#essar%. All $i$es and +al+es do/nstream of $ress(re

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ISSUE

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#ontrol +al+e in#l(ding $ress(re #ontrol +al+e shall be one s#hed(lehigher than needed b% $ress(re #onsiderations to atten(ate the noise. 9or safet% relief +al+es the allo/able noise le+el shall not e#eed 115 d*A for one-3(arter ho(r or less $er da%. The CONT"ACTO" shall o(tline themethods ado$ted to limit the +ibration and noise le+els /ithin s$e#ified+al(es.

Sa,et' +ro1$#$on#

1.104 Safet% +al+es shall be $ro+ided on the dr(m s($erheater and reheater headers and its n(mber and #a$a#it% shall #onform to the #odere3(irements.

1.105 2n addition to the safet% +al+es re3(ired b% the Code ele#tromati# relief +al+e of #a$a#it% not less than 10) of 100) S !C" rating s(itable for remote o$eration shall be $ro+ided on s($erheater o(tlet header. The+al+e shall also be #a$able of a(tomati# o$eration on rise in dr(m $ress(reto a +al(e #orres$onding to a $ress(re setting lo/er than that of thes($erheater safet% +al+e. Ea#h +al+e shall be #om$lete /ith #ontrollersolenoid and $ilot +al+e and $i$ing /ith t/o sh(t-off +al+es.

1.10 All steam safet% +al+es shall be $ro+ided /ith ade3(atel% si=edatmos$heri# relief to .0 m abo+e the steam generator roof. eather shields shall be $ro+ided at $oints /here the relief $i$es $ass thro(gh the

roof. The ele#tromati# relief +al+e first s$ring loaded safet% +al+e and start($ +ents in s($er heater shall be $ro+ided /ith silen#ers.

1.107 Stair#ases on either side of mills /al/a%s and galleries shall be $ro+ided

so that all areas of the steam generator in#l(ding ES; are safel% and#on+enientl% a##essible for o$eration and maintenan#e. Stair#ases shallbe $ro+ided at front on either side or rear of steam generators to 3(i#l%a$$roa#h +ario(s floors. All stair#ases $latforms shall be $ro+ided /ith ,rail safet% handrails of 100 #m high and made of , mm 2 $i$e.

1.108 The minim(m /idth of stair#ase shall be 1000 mm and the minim(m /idthof $latforms shall be 750 mm. The minim(m /idth of inter#onne#ting

/al/a% bet/een mill maintenan#e $latform and the steam generator galler% shall be 1,00 mm. All $latforms and stair#ases shall be $ro+ided/ith gratings and onl% o$erating floor shall be $ro+ided /ith #he3(ered$lates.

1.10: A#t(ators for remote o$eration of sh(t-off gates at the air inlets to #oal millsand #old air and hot air sh(t off gates at o(tlet of #oal mills shall be$ro+ided to allo/ $ositi+e sh(t-off in the e+ent of fire in the mills.

"ontrol Val1e# !or S'#tem

1.110 All #ontrol +al+es shall be si=ed s(#h that the +al+es are #ontrollable o+er

entire o$erating regime +i=. lo/ load to f(ll load. Those #ontrol +al+es /hi#hre3(ire to be o$erated d(ring #old /arm and hot start #onditions shall alsobe #ontrollable d(ring this mode of o$eration. To meet the abo+e

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ISSUE

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re3(irements if the CONT"ACTO" $ro+ides more than one #ontrol +al+ethe #ontrollable ranges of the #ontrol +al+es shall o+erla$ to ens(re b(m$less transfer from one #ontrol +al+e to other. 9or other re3(irements of the#ontrol +al+e refer rele+ant C @ 2 se#tion.

,.0 +ER!ORMAN"E REQUIREMENTS

,.1 General

As the steam generator /ill o$erate generall% base loaded it shall bedesigned to $erform in the most effi#ient manner at 100) t(rbine generator maim(m #ontin(o(s rating T!C" #ondition.

,., Oerat$on 4$t Tur.$ne 3'a## S'#tem

A t(rbine b%$ass s%stem ha+ing a #a$a#it% of 0) of S!C" $rimaril% toenable s(itable steammetal tem$erat(re mat#hing at the t(rbine end for a3(i# restart follo/ing a t(rbine generator tri$ o(t as /ell as to $re+ent asteam generator tri$ in #ase of t(rbine generator tri$ shall be installed. Theb%$ass s%stem /ill also be (sed d(ring #old start-($ of the T (nit. Thet(rbine b%$ass s%stem shall ha+e one 1 ; b%$ass +al+es and t/o , B;b%$ass +al+es.

,. Su&&en Loa& "an%e#

Altho(gh basi#all% a base loaded (nit the steam generator ne+ertheless/ill be s(b6e#ted to large load #hanges often ra$id d(e to eternal s%stemdist(rban#es andor e3(i$ment malf(n#tions mainl% in do/n/ard dire#tion.Sin#e the (nit /o(ld normall% o$erate in a t(rbine follo/ mode the steamgenerator shall be designed for safe stable o$eration b% the (se of onl%$ro+en design #on#e$ts and /ithin the re#ommendations of National 9ire;rote#tion Asso#iation N9;A of DSA> Se#tion 85C and 850. TheCONT"ACTO" shall #learl% s$e#if% the limitations in the design of steamgenerator being s($$lied the etent of a(tomation feasible desirable andtherefore re#ommended and the logi# and #ontrol f(n#tions to be $ro+ided.

,.4 !uel "an%e O1er

Arrangement of b(rners for f(el oil and #oal shall be s(#h as to $ermit safeand 3(i# #hange o+er and safe o$eration (nder #ombination firing of thef(els s(#h f(el #hangeo+ers shall not affe#t the load being #arried b% the(nit at the time $rior to #hangeo+er.

,.5 M$n$mum Sta.le Loa&

The steam generator shall be #a$able of o$erating /itho(t stabilising f(eloil /hen o$erating /ith t/o or more #oal mills ea#h #arr%ing the minim(mload s$e#ified b% CONT"ACTO". The steam generator shall be #a$able of

o$erating /ith stabilising f(el oil /hen one #oal mill o$eration and #arr%ingminim(m load on the #oal mill s$e#ified b% CONT"ACTO". The steamgenerator shall be designed so as to minimise the (se of stabilising f(el oil.

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IISECTION: D1.1

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ISSUE

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The CONT"ACTO" shall indi#ate the minim(m #oal mill load a at /hi#h$oint a #oal mill m(st be remo+ed from ser+i#e /hen t/o other #oal millsare also in o$eration ea#h sharing e3(al load b at /hi#h $oint stabilisingf(el oil is to be introd(#ed before taing o(t the se#ond mill # /hen onemill is in o$eration and stabilising f(el oil is in (se. CONT"ACTO" shallnote that the minim(m stable load /itho(t f(el oil s($$ort for $(l+erised f(elflame stabili=ation shall not be more than 0) of steam generator !C"S!C" load.

,. No$#e an& V$.rat$on

The steam generator shall $erform #ontin(o(sl% /ith its #om$onents anda(iliaries not e#eeding the le+els of noise and +ibration s$e#ified.

,.7 Rate o, Loa&$n%

The steam generator shall be loaded as fast as $ra#ti#able s(bse3(ent tos%n#hronisation after #old/armhot start-($ /ith 0) #a$a#it% b%$asss%stem in ser+i#e. The CONT"ACTO" shall indi#ate the #riteria that /illgo+ern the rate of loading of the steam generator. S$e#ifi# referen#e shallbe made to thermo#o($les and their lo#ations on the steam generator/hi#h /ill be (sed to establish steam generator loading s#hed(les /ithreferen#e to the loading #riteria. The thermo #o($le shall ha+e minim(m life

of ten 10 %ears.

,.8 Oerat$on W$tout *+ !ee& Water *eater#

The steam generator shall also be designed for o$erating #ontin(o(sl%#orres$onding to the 100) T !C" #ondition /hen the high $ress(re feed/ater heaters are o(t of ser+i#e.

,.: All ele#tri#al de+i#es $arti#(larl% solid state ele#troni# #om$onents shall bes(itable for tro(ble-free satisfa#tor% o$eration if lo#ated o(tdoors aro(ndthe steam generator /here high ambient tem$erat(re and d(st% #onditions/ill $re+ail.

,.10 O5$&e# o, N$tro%en

The steam generator (nit shall in#or$orate $ro+isions ne#essar% to restri#tthe emission of oide of nitrogen. The CONT"ACTO" shall f(rnish detailson NO #ontrol s%stems.

,.11 Eletro#tat$ +re$$tator (ES+)

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ISSUE

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The ele#trostati# $re#i$itator shall be designed for a d(st #on#entration note#eeding 75 mgN! at ES; o(tlet /ith s$e#ified /orst #oal firing and /ithall fields in ser+i#e.

a S(itable $rote#ti+e de+i#es in#l(ding o+er #(rrent and (nder +oltagerela%s and mo(lded #ase miniat(re #ir#(it breaers shall bein#or$orated in the #ontrol e3(i$ment and shall o$erate to tri$ the$o/er s($$l% #onta#tor. All #ontrols @ instr(ments re3(ired for o$eration of the ES; (nder man(al or a(tomati# #ontrol shall bef(rnished b% the *idder.

b All sili#on re#tifier #ells shall be #onser+ati+el% rated for #om$atibilit%/ith maim(m #ir#(it load re3(irement. ;rote#tion for re#tifier #ir#(itshall be $ro+ided.

# S(ffi#ient #orona $o/er shall be a+ailable in the s$aring mode at allo$erating #onditions.

,.1, Su&&en Lo## o, E5ternal Loa&

On o##asions the steam t(rbine generator s%stem ma% e$erien#e s(ddentotal loss of all eternal loads. Dnder these #onditions the ;-B; b%$asss%stem shall o$erate and the steam generator and the steam t(rbinegenerator together shall #ontin(e o$eration /itho(t tri$$ing to s($$l% $o/er

for the $o/er $lant a(iliaries abo(t 5-) of #a$a#it%. The #om$leteinstr(mentation and #ontrol s%stem and ele#tri#al s%stem shall beade3(atel% designed to tae #are of the abo+e o$eration of the $o/er $lant.

,.1 The e$e#ted normal load range of the (nit shall be from 40) T !C" to100) S !C".

2.13.1 The S shall be g(aranteed for #oal firing to a#hie+e follo/ing limits of #ontrol and (nits res$onse /ith s(itable #ontrol s%stem> refer to 2@CSe#tion

2tem ;arti#(lars S($erheater O(tlet ;ress(re&e+iation

S($erheater O(tletTem$erat(re

&e+iation

&r(m Be+el&e+iation ifa$$li#able

a Stead% state G 0., g#m, G ,.00C G 15mm

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ISSUE

R0

b "am$ bet/een 0) T !C"and 100) S !C"#ondition >

i "ate of 1) $er min(te G 0. g#m, G 0C G 15 mm

ii "ate of ) $er min(te G 0.5 g#m, G 50C G ,0 mm

iii "ate of 5) $er min(te G 1.0 g#m, G 80C G ,5 mm

i+ "ate of 10) $er min(te

G 1.5 g#m, G 100C G 50mm

# Ste$ load #hange from 100)S !C" in #ase of r(n ba#

d(e to loss of one 9&;ASA2& fan or boiler feed$(m$ or an% other emergen#%.

G 5.0 g#m, G ,00C G 100 mm

.0 MAINTENAN"E REQUIREMENTS

.1 The CONT"ACTO" shall $ro+ide fa#ilities for #arr%ing o(t on-load and off-load maintenan#e of the steam generators and its an#illaries. 2n generalthis sho(ld in#l(de ade3(ate handling e3(i$ment /oring s$a#e $latformsand safet% de+i#es.

., A##ess doors shall be $ro+ided to $ermit a##ess to the f(rna#es($erheater the area bet/een the t(be bans and dr(ms E#onomiser andan% other areas re3(iring a##ess. A##ess doors on both sides of the last$ass shall also be f(rnished. All a##ess doors $ro+ided for f(rna#e ES;d(#ts et#. shall be of minim(m 450 mm 450 mm.

. Stair#ases on either side of the steam generator shall be $ro+ided. Theangle of the stair#ase shall not be less than 450 /ith +erti#al e#e$t in +er%#riti#al areas. Stair#ases shall also be $ro+ided at the rear of the steamgenerator in the b(rner =one #onne#ting b(rner $latforms to enableo$erators to attend b(rner at other le+els.

.4 2n order to #arr% o(t on-load maintenan#e it is ne#essar% that thee3(i$ment s($$lied #an be readil% disassembled re$aired and assembledin the shortest $eriod. 2t sho(ld also be $ossible to attend to the e3(i$mentb% a minim(m disassembl% of $arts. 9or "A; it sho(ld be $ossible tore$la#e #old end elements /itho(t dist(rbing dislodging other elements #om$onents of the "A;. Arrangement for #ooling the e3(i$ment and3(i# a##ess shall also be ens(red.

.5 The o$eratingmaintenan#e $latforms aro(nd the f(rna#e and e3(i$mentshall be +er% #lose to the f(rna#e e3(i$ment #asing and the #lear ga$ shallnot e#eed 150 mm bet/een edge and f(rna#ee3(i$ment #asings.

. !aintenan#ea##ess $latforms for $(l+erised f(el steam /ater. And oil$i$ing and fittings and for dam$ers on air and fl(e gas d(#ts shall be

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$ro+ided. A##ess $latforms stair#ases and /al/a%s /ith toe boards shallbe $ro+ided for all the #riti#al e3(i$ment +i=. soot blo/ers air $reheaters2& 9& ;A fans +al+es of #riti#al ser+i#es transmitter ra#s 6(n#tion boeset#.

.7 !aterial handling e3(i$ment #onsisting of monorails hoists and trolle%sEle#tri# o$erated /ith all other an#illaries in#l(ding s($$orting str(#t(re asre3(ired shall be $ro+ided for 2& 9& ;A fans and fan dri+es "A; millsand ES; maintenan#e.

.8 One n(mber a$$ro+ed t%$e f(rna#e ins$e#tion and maintenan#e

e3(i$ment similar to s% #limber shall be s($$lied b% the CONT"ACTO".This e3(i$ment sho(ld be basi#all% a #ombination of s(s$ended $latforms#om$lete /ith hoisting ro$es $ne(mati#all% o$erated hoisting /in#hessafet% rails toe boards stabilisers and all other items for safe and effi#iento$eration. The e3(i$ment offered m(st be #a$able of being introd(#edthro(gh the a##ess hole $ro+ided in the #omb(stion #hamber. S(itableo$enings at a$$ro$riate lo#ations in the f(rna#e and $ent ho(se roofs /ith$i$e slee+es shall be $ro+ided for insertion of s% #limber ro$es /itho(tentering the $ent ho(se. These o$enings shall be #a$$ed s(itabl% to$re+ent fl% ash s$illage on the roof. S($$orts for mo(nting the /in#hesshall be $ro+ided on the steam generator roof.

.: A $ent ho(se shall be formed abo+e the roof of the steam generator for attending to t(bes and headers and thermo#o($les in this area. 2t shall beof a hot design ha+ing the ins(lation on the o(tside of the #asing to $ermitit to e$and and #onta#t /ith the f(rna#e /alls. 2n order to a+oid fl% ashinfiltration thro(gh the s$a#e aro(nd the t(bes #oming o(t from the f(rna#ein this area all /elded seals bet/een f(rna#e gas $ass and $ent ho(seshall be $ro+ided. O$ening in the steam generator roof for introd(#tion of #ables shall be etended thro(gh the $ent ho(se in the form of $i$eslee+es so that #ables #o(ld be introd(#ed /itho(t entering the $ent ho(se.

.10 ;ent ho(se roof en#los(res at firing aisle $latforms and at dr(m le+el shall

be #o+ered /ith $re #oated metal sheet.

.11 Se$arate +entilation fans shall do the $ent ho(se #ooling /ith air inleto$enings at o$$osite ends. The #a$a#it% of the fan shall be o$tim(m for safe and fast #ooling of the $ent ho(se.

.1, The maintenan#e tools re3(ired for ro(tine maintenan#e of e3(i$ment shall

in#l(de b(t not is limited to the tools listed belo/. The CONT"ACTO" shallalso f(rnish a #om$rehensi+e list of other re#ommended maintenan#e toolsre#ommended b% him.

The maintenan#e tools that sho(ld be in#l(ded in the offer for the steam

generator are as listed belo/>

------------------------------------------------------------------------------------------;arti#(lars N(mbers

------------------------------------------------------------------------------------------

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!ANS

a *earing $(llers for ea#h t%$e of fan ,

b Tor3(e /ren#hes of follo/ing #a$a#it% , ea#hfor ea#h t%$e of fan -

1 - 5 g.m5 - 5 g.m,0 - 50 g.m

# Bifting e%e for ea#h t%$e of fan 10------------------------------------------------------------------------------------------

;arti#(lars N(mbers------------------------------------------------------------------------------------------d *earing fa#e o(t #he#ing dial ga(ge for ea#h

t%$e of fan ,

"OAL MILLS

a *earing $(llers , b S$anners and /ren#hes s$e#ifi# to the mills , sets # *earing fa#e o(t #he#ing dial ga(ge ,

d *o/l bo/l h(b gear bo et#. remo+al hoisting 1 set9it(res

GRAVIMETRI" !EEDERS

a Che#ing bar , Nos.

b ;(lle% lift bar assembl% 1 No.

# ;(lle% remo+al tool 1 No.

d 9eeder #alibrating instr(ment it 1 No.

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e &igital ta#hometer 1 No.

f Shims for #alibration Nos.

SOOT 3LOWERS

a Soot blo/er +al+e hand la$$ing tool 1

!UEL 3URNERS

a Oil b(rner #leaning ben#h /ith ne#essar%dismantling tools , sets

b *e+el $rotra#tor , sets

# Coal b(rner #leaning ben#h /ith ne#essar%dismantling tools , sets

MOUNTING AND !ITTINGS

a and la$$ing tool set for safet% +al+es 1 b and la$$ing tool set for +al+es 1

# Straight bars for seal setting for A; 4 nos.

d !aster le+el ga(ge 1 no.

e &ial ga(ge for A; , nos.

SA!ETY VALVES

On line testingsetting de+i#e for safet% 1 for ea#h t%$e+al+es

OT*ER ITEMS

a 2n#lined manometer 1

b 2ntros#o$e 1

# *oiler t(be thi#ness meas(ring 1 no.instr(ments /ith $rints

d 1.1 sg writeup-4783a150506

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