‘ELECTROSTATIC PRECIPITATOR’ PACKAGE

FOR

TANDA THERMAL POWER PROJECT, STAGE-II (2 x 660 MW)

BIDDING DOCUMENT NO. : CS-9562-104-2

Salient Technical Features of the Equipments/ Systems/ Services covered in NIT/IFB No. 40030217 dated 26.11.2014 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 brief scope of work includes Design, Engineering, Manufacture, Shop Testing at works/ Type Testing, Supply, Handling & Storage at Site, complete Installation, Testing & Commissioning, putting into satisfactory operation, successful ‘Completion of Facilities’ and Performance and Guarantee Testing of Electrostatic Precipitator Package including supply of Mandatory Spares.

Each Electrostatic Precipitator serving one Steam Generator shall have but not limited to the following:

·               Six (6) numbers of independently operated passes (gas streams) housed in Six (6) Nos. of independent casings including outside shell, structural steel supports and frame work (excluding foundation), access ladders, platforms, safety rails, stairways, walkways, access doors and weather proof pent house, matching flanges alongwith all bolts, nuts, gaskets and all the expansion joints etc. as required to connect the ESP passes.

·               Flue Gas Inlet Distribution System complete with perforated plates, turning vanes, deflector plates, flow splitters, guide vanes and all necessary gas flow control devices in the inlet and outlet cones and duct, warranted by the results of flow model test, complete duct stiffening devices, interior bracings, slide plates, access doors, brackets, supporting structures, hangers, sampling connections.

·               Collecting and Discharge Electrode Systems, Rapping System complete with structural supporting frame, drives and automatic rapping control.

·               High Voltage Transformer-Rectifier Sets complete with bus sections, grounding switches, controls, leveling wheels, etc.

·               Ash Hoppers complete with heater, level monitors and indicators, outlet flanges, jointing material, poke holes, access doors and walkways beneath the hoppers.

·               Foundation base plates, bolts along with templates, nuts, anchor materials, packing shims, inserts & embedments alongwith lugs, inspection and maintenance access doors, frames and safety locks, safety devices, safety barriers.

·               Monorails with electrically operated hoists including monorail beams on the roof for handling transformer rectifiers.

·               One (1) No. conventional type Elevator for each ESP Control Room.

·               Water washing system for the ESP and its hoppers along with all piping, valves and nozzles.

·               Thermal insulation, Lagging, Cladding & Refractories etc.

·               Opacity monitors complete with all accessories at the outlet of each pass (gas stream).

·               Comprehensive model testing by fabricating a three dimensional physical model of the ESP and its ducting.

·               MCC / Auxiliary Control Panel for power supply to rapper motors, hopper heaters & insulator heaters etc.

·               Complete microprocessor based ESP management and control system including the intermittent charging TR Set controllers, rapping system controllers, communication controllers etc.

·               Complete cable erection including cable support structures, cable trays, conduits, cable termination lugs, glands, cable tag numbers, core identification ferrules, junction boxes, local push button stations etc.

B.     System Description:

The Electrostatic Precipitators shall be of outdoor type and installed on the cold end side of regenerative air preheaters. The flue gas shall be drawn from air preheater outlets of the balanced draft, pulverized coal fired Steam Generator and guided through adequately sized duct work (included in separate Steam Generator Package) into the specified number of independent gas streams of each ESP. Similarly, the flue gas after the Electrostatic Precipitators shall be led to the suction of the induced draft fans.

C.     Service Conditions:

The Steam Generators are designed to burn pulverized coal. Light Diesel Oil (LDO) shall be used during startup and at low loads for warm up and flame stabilization of Steam Generator. The ESP shall be designed to remove fly ash particles (to meet the stipulated ESP efficiency levels) from the flue gas generated in the Steam Generator with pulverized coal firing.