Flue Gas Desulphurization (FGD) System Package for
Telangana STPP,
“Salient Technical Features of the equipment/systems/services covered in Bidding Document
SALIENT TECHNICAL FEATURES
A.Brief Scope of Work:
The scope of Flue Gas Desulphurisation (FGD) System Package for two (2) unit of 800 MW 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 equipments under bidder’s scope of work of FGD System and its associated auxiliaries including all associated Electrical, Control & Instrumentation , Civil, Structural and Architecture works. Flue Gas Desulphurisation System shall have but not limited to the following:
ßComplete Absorber with, structure, foundation and associated equipments- Spray headers& nozzles, mist eliminators & washing, oxidation grid, agitators, quenching spray system etc.;
ßSlurry
ßAuxiliary absorbent tanks & limestone storage tank complete with structure & foundation, agitators etc.;
ßLimestone silos complete with structure & foundation;
ßProcess water storage and pumping system;
ßDucting along with supports;
ßThermal Insulation, Lagging, Cladding, Painting;
ßComplete process water and slurry piping along with associated valves etc.
ßOne (1) number of elevator for each absorber and One (1) numbers of elevator for Limestone Grinding System building;
ßAll 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.;
ßComplete C&I systems including PLC based control system , field instrumentation with associated PCP, power supply system, instrumentation cables and accessories etc;
ßBuildings for Slurry
ßAssociated Civil, Structural and Architectural works including foundation.
ßFirst 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 SO2 (to meet the stipulated SO2 efficiency levels) from the flue gas generated in the Steam Generator with pulverized coal firing.