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‘DRY SORBENT INJECTION (DSI) SYSTEM PACKAGE
FOR
NCTPP, DADRI STAGE-I (4X210 MW)
BIDDING DOCUMENT NO. : CS-6120-109C-2
Salient Technical Features of the Equipments/ Systems/ Services covered in NIT/IFB
No. 40087173 dated 23.03.2018 are mentioned below.
These Salient Technical Features are mentioned only to facilitate the prospective
Bidders to prima-facie understand the requirements under the tender and shall not in
any way limit or alter the Scope of Work and Technical Features/ Specification of
Equipments/ Systems/ Services covered in the Bidding Documents. Detailed
provisions in regard of Scope of Work and Technical Features/ Specification of
Equipments/ Systems/ Services, contained in the Bidding Document shall be final
and binding.
SALIENT TECHNICAL FEATURES
A. Brief Scope of Work:
The scope of Dry Sorbent Injection (DSI) System Package for NCTPP, Dadri, Stage-I
(4X210MW) for four (4) units of 210 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 Dry Sorbent Injection
(DSI) System and its associated auxiliaries including all associated Electrical, Control &
Instrumentation , Civil, Structural and Architecture works. Dry Sorbent Injection System shall
use Sodium Bicarbonate as reagent and shall have but not limited to the following:
Sodium Bicarbonate (SBC) Storage Silos for each units complete with Truck Unloading
System to Storage Silos, Sodium Bicarbonate Feeding, Milling & Injection system for
each unit;
Instrument air compressors common for all the units;
Mill building for each unit for housing Mills, Unloading and Injection Blowers, Truck
unloading Blowers, Dehumidifiers etc.
Complete Electrical System including all motors, LT Switchgears, Transformers, Electrical
Actuators, LT power & control cables, cabling, lighting, common MCC room etc.
Complete C&I systems including SO
2
analyser.
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.
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B. Other Technical Features:
1.00.00 Dry Sorbent Injection (DSI) System
1.01.00 System Description:
The DSI system for SO
2
control shall be based on Sodium Bicarbonate as reagent.
Sodium Bicarbonate shall be milled before being injected at appropriate location at
APH inlet/APH outlet for capturing of SO
2
in the flue gas. ESPs are installed
downstream of APH where the reactants shall be collected along with ash.
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 stablisation
of Steam Generator. The DSI 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. High efficiency Electrostatic Precipitators are installed
downstream of Steam Generators.
