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COMBUSTION MODIFICATION PACKAGE

FOR

NCTPP, DADRI STAGE-II (2X490 MW)

BIDDING DOCUMENT NO. : CS-6130-103A-9

Salient Technical Features of the Equipments/ Systems/ Services covered in NIT/IFB

No. 40087185 dated 27.03.2018 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

Combustion modification is an in-furnace modification for reducing NOx

generation during combustion process by Air Staging in furnace. This

technique produces staged combustion by introducing a portion of the

secondary air above the firing zone, which in turn reduces the amount of

available oxygen in the main combustion zone where NOx is generated. In

this arrangement there is no change in total quantity of combustion air being

introduced to the furnace remains unchanged. Only the air distribution

between zones is changing.

Concentric firing system also shall be installed which shall form the first stage

of air staging. OFA shall result in second stage of air staging.

The air admitted thru the furnace above the combustion zone, results in third

stage firing which completes combustion and reduces the NOx formation at

high heat zone.