SALIENT TECHNICAL FEATURES
A. Brief Scope of Work:
The scope of Flue Gas Desulphurisation (FGD) System Package for each project covered under Lot-3
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, low
height wet chimney , and its associated auxiliaries including all associated Electrical, Control &
Instrumentation, Civil, Structural and Architecture works. Flue Gas Desulphurisation System 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 and One (1) numbers of elevator for Limestone
Grinding System building
Low height wet chimney
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 & FGD control Room
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
2
(to meet the stipulated SO
2
efficiency levels) from the flue
gas generated in the Steam Generator with pulverized coal firing.