Project: Feroze Gandhi Unchahar Thermal Power Station, Stage–II (2X210MW)

Package: Renovation & Retrofitting of Electrostatic Precipitator Package Document no. CS-1430-104A(R&M)-2

Salient Technical Features:

"Salient Technical Features of the equipment/systems/services covered in IFB No. 40063260 dated 17.09.2016 is 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 equipment/systems/services covered in the Bidding Documents. Detailed provisions in regard of scope of work and technical features/specification of equipment/systems/services, contained in the Bidding Documents shall be final and binding."

The Electrostatic Precipitators are of outdoor type and installed on the cold end side of regenerative air preheaters. The flue gas is drawn from air preheater outlets of the balanced draft, pulverized coal fired Steam Generator and guided through adequately sized duct work into the specified number of independent gas streams of each ESP. Similarly, the flue gas after the Electrostatic Precipitators is led to the suction of the induced draft fans. The intent of the Renovation and Retrofitting of Existing ESPs is to reduce the particulate emission level to ≤ 50 mg/Nm3.

The scope of work for Renovation & Retrofitting package consists of the following:

i)Enhancing collection area of existing ESPs

ii)Strengthening of existing ESP structure/foundation as required due to renovation of existing ESP.

iii)Engineering of complete microprocessor based control system for above options

iv)Supply of item/ component as required.

v)Supply of Mandatory spares as detailed in technical specification.

vi)Services like dismantling/ repair/ overhaul/ retrofitting of various other components/ systems/ sub-systems as may be required, to ensure sustained, safe commercial operation, and to meet stipulated design/ guarantee requirement and to meet the overall objectives of retrofitting of ESP.

vii)The scope of work also includes erection of the total equipment, commissioning, gas distribution testing, trial operation, performance guarantee testing etc.

viii)Refurbishment of the existing ESPs by replacement of internal components in each unit of existing ESPs as per the BOQ identified in technical specifications.

ix)All associated Civil & Electricals work for the above scope.

Various Options for Renovation & Retrofitting of existing ESPs

Bidder can select any one of the following options for each unit to achieve the targeted emission level of ≤ 50mg/Nm³ as per the detail scope of work.

OPTION- I

Renovation, Modernization, Upgradation & Retrofitting of existing ESPs with rigid discharge frame work type of design

Renovation of existing ESPs by increasing the collecting electrode (CE) height with/without modifying Collecting Electrode spacing of existing ESPs along with strengthening of ESP structures.

OR

OPTION- II

Renovation, Modernization, Upgradation & Retrofitting of existing ESPs in combination of rigid discharge frame work type of design with Moving Electrode plate type of design

Convert last one/two fix field(s) of existing ESPs to Moving Electrode plate type of design field(s) and renovation of remaining fixed fields of existing ESPs with new internals with/without increasing the collecting electrode (CE) height with/without modifying CE spacing of existing ESPs along with strengthening of ESP structures.