SOP HRSG

WI/OPS/ HRSG-01 STANDARD OPERATING PROCEDURE

1. SYST SYSTE EM NA NAME: ME: HEAT RECOVERY STEAM GENERATOR. 2. OBJ OBJECT ECTIVE: IVE: The Heat Recovery Steam Generators (HRSG) ut!"e# n the Com$ne# Cyc!e %!ants& carres out the 'uncton to ro#uce steam to su!y the Steam Tur$nes (ST)& ut!"n the therma! enery o' the Gas*Tur$nes (GT) e+haust as& $e'ore #scharn t to atmoshere $y means o' the $o!er stac,.

3. SYST SYSTEM EM DES DESCR CRIP IPTI TION ON:: To carry out ths 'uncton& the HRSG are !ocate# #o-nstream the GT an# are contane# n casns to 'ormn an e+tenson o' the GT ases e+haust #ucts. The steam enera enerator tors s are o' mu!tt mu!ttu$u u$u!ar !ar tye tye an# steam steam #rum& #rum& natura natura!! or  actvate# -ater crcu!aton& -th econom"er an# suer heater. The e+haus e+haustt ases ases comn comn 'rom 'rom the GT cross crosses& es& n seue seuence nce&& the #stn #stnct ct comonents o' steam enerators to trans'er to them the heat 'or convecton mo#e. The 'ee# -ater re*heate# n the econom"er& '!o-s n the evaorator an# the saturate# steam ro#uce# s co!!ecte# n the steam #rum& !ocate# n the uer  "one o' the steam enerator. The steam crosses then the suer heater an# s #e!vere# to the ST. To contro! the $o!er out!et steam temerature& the suer heater s rov#e# -th #esuerheater& #esuerheater& -hch may $e o' -ater sray tye or sur'ace tye. /n the com$ne# cyc!e unt o' !are caacty& caacty& 'or technue an# economc reasons& the the stea steam m ene enera rato tors rs are are su$# su$#v v# #e# e# n t-o t-o or thre three e sect secto ons ns&& o' hh hh&& nterme#ate an# !o- ressure& an# the re!evant heat e+chaner e!ements are conv conven ene ent nt!y !y #st #str r$u $ute te# # a!on a!on  the the cour course se o' the the GT e+ha e+haus ustt as. as. The suerheate# steam ro#uce# $y the #''erent sectons o' the steam enerators& s conveye#& resectve!y& resectve!y& to the hh& nterme#ate an# !o- sectons o' ST. /n some cases the HRSG are rov#e# -th su!ementary su!ementary 'rn& !ocate# !ocate# n the e+hau e+haust st as #uct #uct ustre ustream am o' the suerh suerheat eate# e# to ncrea ncrease se the suer suerhea heate# te# steam temerature. The Heat Recovery Steam Generator s a #ua! steam ressure tye& natura! crcu!aton& -thout su!ementary 'rn. The suerheate# steam ro#uce# at #''erent ressure s ut!"e# to 'ee# the hh an# !o- ressure o' Steam Tur$ne sectons. A 0#verter #amer1. 2ocate# at the entrance o' the GT e+haust as o'  the HRSG& ermts to e+c!u#e the $o!er #scharn the e+haust as #rect!y to atmoshere& -henever t s necessary. /nta! /s /ssue 3a 3ate: 45 45.56.6447

Current Re Revson: 4

Reliance Energy Limited, Samalkot Power Station

Revson 3a 3ate: 45 45.56.6447

%ae 5

WI/OPS/ HRSG-01 The HRSG heatn sur'aces are #v#e# n the 'o!!o-n sectons& n the #recton o' the e+haust as '!o-:

- H% suer heater 6 H% suer heater 5

- H% evaorator  * H% econom"er 6

- 2% suer heater - 2% evaorator  - H% econom"er 5 n ara!!e! -th 2% econom"er  The heatn sur'aces are assem$!e# n mo#u!es& searate# $y cavtes. /n the n!et #uct a ressure transmtter& a ressure n#cator an# t-o ressure tan ont are rov#e#. S+ temer temeratu ature re tan tan  ont& ont& one occu occue# e# $y a thermo thermocou cou!e !e&& are rov rov#e# #e# ustream H% suer heater 6. /n each cavty s+ temerature tan ont are rov#e#& three each s#e& one occue# $y a thermocou!e 'tte# 'or suervson o' the as temerature ro'!e a!on the heatn sur'aces. 3o-nstream the $an,s& at the n!et o' the stac,& s+ temerature tan ont& one occue# $y a thermocou!e& are rov#e#. 8our ressure*tan onts are a!so rov rov# #e# e#&& one one occu occu e# e# $y a !oca !oca!! res ressu sure re n# n#ca cato torr an# an# one one $y a res ressu sure re transmtter to contro! room.  A!! the nstruments rov#e# 'or the e+haust e+haust as system have have the on!y urose o' !oca! or remote suervson. HRSG HIGH PRESSURE LEVEL The HRSG hh*ressure !eve! has the urose to enerate H% steam at the correct ressure& temerature& an# ua!ty n accor#ance -th the heat ava!a$!e 'rom the GT e+haust as an# reurements o' the ST. 8or ths urose& t -!! $e su!e# -th the #ue amount o' 'ee# -ater at any tme #urn ts oeraton: stea#y !oa#& start*u or !oa# chanes. /nta! /s /ssue 3a 3ate: 45 45.56.6447

Current Re Revson: 4

Reliance Energy Limited, Samalkot Power Station

Revson 3a 3ate: 45 45.56.6447

%ae 6

WI/OPS/ HRSG-01 The H% suerheate# steam -!! $e su!e# to the ST throuh the H% man steam n system. The H% system s eue# -th nterme#ate #esuerheater to contro! the man steam out!et temerature at the #esre# va!ue n any oeratn con#ton. The H% #rum !eve! contro! staton s !ocate# #o-nstream the H% econom"er to revent 'rom steamn n the econom"er tse!'& 'or 'ee# -ater !o- '!o- #urn the start*u.

HP SECTION STEAM GENERATOR The hh ressure secton o' steam enerator s !ocate# #o-nstream the e+haust as n!et to the HRSG an# ts heatn sur'ace s ma#e o' 'nne# tu$es& crosse# $y he hot as n the 'o!!o-n or#er:

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H% Suer heater 6

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H% Suer heater 5

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H% Evaorator

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H% Econom"er 6

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H% Econom"er 5.

9ater 'rom the H% 'ee# -ater !ne enters the H% econom"er 5 an# 6& n counter  '!o- -th resect to the e+haust as& -here t s heate# u to the arorate econom"er out!et temerature an# s then #e!vere# to the H% #rum. The H% econom"ers 5 an# 6 are eue# -th manua! #rans an# vents.  A #rum !eve! contro! staton s !ocate# #o-nstream the H% econom"er an# conssts o' t-o man 'ee# -ater contro! va!ves suta$!e to contro! the H% #rum !eve! n the rane 4*544; MCR (one n stan#*$y) an# a !o- !oa# 'ee# -ater contro! va!ve suta$!e 'or !oa#s $e!o- 4; MCR. Each !eve! contro! va!ve s rov#e# -th one ntercetn motor"e# on*o'' va!ve ustream an# one ntercetn manua! on*o'' va!ve #o-nstream. Suta$!e manua! #rans are a!so rov#e# $et-een the ntercetn va!ves an# the contro! va!ves to emty the !nes n case o' contro! va!ves mantenance. !o-*#o-n con#uctvty I QScm  H%? 7 2% Steam SO6 m ma+ 4&46 Steam con#uctvty I QScm  4&6 ( 4&7II) O+en O6 at #eaerator out m ma+ 4&4= Hy#ra"ne N6H= 'ee# -ater m  4&46 /ron (8e) n 'ee# -ater m ma+ 4&46 I The con#uctvty va!ue ta,es n cons#eraton the sam!e a'ter catonc e+chane (ac# con#uctvty) S()$'+ ,(,$ $''0:  Actua! settn at the s#e s as 'o!!o-s: HRSG SA8ETY VV SET  RESET VA2