SALIENTTECHNICALFEATURES

A.BriefScopeofWork:

ThescopeofFlueGasDesulphurisation(FGD)SystemPackageforeachprojectcoveredunderLot‐5

shall cover design, engineering, manufacture, shop fabrication, preassembly, shop  testing/type

testingatmanufacturer’sworks,packing,transportation,unloading,handlingandconservationof

equipment at site, complete services of construction including erection, supervision, pre‐

commissioning,commissioningandperformancetestingofequipmentunderbidder’sscopeof

workofFGDSystem;Limestonehandling,storage,crushingandGypsumhandling&storage(except

for Ramagundam‐III project), low height wet chimney (except for Rourkela project), RO based

Desalination Plant/ PT Plant (only for Vallur project) and its associated auxiliaries including all

associatedElectrical,Control&Instrumentation,Civil,StructuralandArchitectureworks. Flue Gas

DesulphurisationSystem(asapplicable)shallincludebutnotlimitedtothefollowing:

 Complete Absorber with structure, foundation and associated equipment‐Sprayheaders&

nozzles,misteliminators&washing,oxidationgrid,agitators,quenchingspraysystemetc.

 Slurryre‐circulation/GasCoolingpumps,Oxidationblower,Gypsumbleedpumps,Limestone

grinding system, Limestone Slurry pumps, Vacuum beltfilter system, Auxiliaryabsorbent slurry

pumpswithdrivemotor,piping,valves,accessories

 Auxiliary absorbent tanks & limestone storage tank complete with structure & foundation,

agitatorsetc.

 Limestonesiloscompletewithstructure&foundation

 Processwaterstorageandpumpingsystem

 Boosterfans,ducting,dampersalongwithsupports

 ThermalInsulation,Lagging,Cladding,Painting

 Completeprocesswaterandslurrypipingalongwithassociatedvalvesetc.

 One(1)numberofelevatorforeachabsorberhigherthan15m,One(1)numbersofelevatorfor

LimestoneGrindingSystembuildingandOne(1)numbersofelevatorforDewateringbuilding

 Lowheightwetchimney

 RObasedDesalinationPlant/PTPlant

 Limestonehandling,storage,crushingandGypsumhandling&storagesystem

 AllMotorsalongwithcouplingsandcouplingguardsforallrotatingauxiliariescoveredunderthis

package,Transformer,HT&LTSwitchgears,DCsystem, Electricactuatorswithintegralstarters

alongwithassociatedaccessories,HT&LTpower&controlcables,cabling,lighting,earthingand

lightningprotection,DGset(ifapplicable)etc.

 CompleteC&IsystemsincludingDDCMISbasedcontrolsystem,field instrumentation with

associatedPCP,powersupplysystem,instrumentationcablesandaccessoriesetc.

 Sheds for Slurry ‐circulation pumps/ Oxidation blowers and buildings for Limestone Grinding

System,Gypsumdewateringsystem,Compressors&FGDcontrolRoo

m

 AssociatedCivil,StructuralandArchitecturalworksincludingfoundation

 First fill and one year topping requirement of consumables/oils/lubricants, supply of special

maintenance tools and tackles, commissioning spares, mandatory spares etc.



Detailedscopeofworkhasbeenspecifiedinthebiddingdocuments.



B.OtherTechnicalFeatures:



1.00.00FlueGasDesulphurisation(FGD)System



1.01.00SystemDescription:

TheFGDsystemshall be basedonWetLimestoneForcedOxidationprocess.Gasfromsuitable

pointonIDfandischargeductshallbetakentotheAbsorber.CleangasfromtheAbsorbershallbe

takenthroughmisteliminators.TreatedfluegasfromtheAbsorbershallbedischargedtochimney.

Gypsum from Absorber shall be pumped by dedicated gypsum bleed pumps to a Gypsum

Dewateringsystem.Washedanddewateredgypsumfromthedewateringsystemshallbefedtoa

beltconveyorandtransferredtoGypsumstoragebuilding.



1.02.00ServiceConditions:

TheSteamGeneratorsaredesignedtoburnpulverisedcoal.HFO/HPS/LSHSandLDOshallbeused

duringstartupandatlowloadsforwarmupandflamestabilizationofSteamGenerator.TheFGD

systemshallbedesignedtoremoveSO

(tomeetthestipulatedSO

efficiencylevels)fromtheflue

gasgeneratedintheSteamGeneratorwithpulverizedcoalfiring.