SALIENT TECHNICAL FEATURES

A Brief Scope of Work:

The scope of Flue Gas Desulphurisation (FGD) System Package for each project covered

under Lot-1B 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, Lime stone handling, storage,

crushing and Gypsum handling & storage, low height wet chimney, Zero Liquid Discharge

(ZLD) in projects where applicable, 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:

Complete Absorber with structure, foundation and associated equipments- 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;

Zero liquid Discharge system (ZLD) for FGD waste water treatment in projects where

applicable as indicated in detailed scope;

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 PLC based control system , field instrumentation with

associated PCP, power supply system, instrumentation cables and accessories etc;

Buildings for Slurry -circulation pumps/Oxidation blowers, re 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 SO2 (to meet the stipulated

SO2 efficiency levels) from the flue gas generated in the Steam Generator with pulverized

coal firing.