COAL FEEDING SYSTEM PACKAGE UNDER BALANCE WORK

OF MAIN PLANT PACKAGE PART-A (SG & AUX.)

FOR BARH SUPER THERMAL POWER PROJECT, STAGE-I (3X660 MW)

Salient Technical features of the equipment/ systems/ services covered in the NIT No. CS-9558-102L-2 dated 27.03.2015 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 / specifications 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.

1.00.0 Coal Feeding system shall cover broadly two parts i.e. i) Complete system from Burner outlet to Mill inlet and ii) Complete system from mill outlet to Burner inlet

1.01.0 Complete system from bunker outlet to Mill inlet

1.02.0 Raw Coal chutes and bunker shut off valves

1.03.0 Coal Feeder

1.01.00 Type

Gravimetric type raw coal feeders with microprocessor based precision weighing and calibration devices

1.02.00 Other Features of Steam Generator Design

Gravimetric feeder shall be belt type with size of 36” .

1.03.00 Rating of Coal Feeder(s)

Coal feeder capacity shall not less than 111.6 t/hr

2.00.00 Pulverised Coal Piping

Ø Pulverised coal piping from mills to burner including ceramic lined pipe/ bends as per specification

Ø Adjustable orifices

Ø On line coal flow measurement system

Ø Coal sampling system

Ø Burner inlet valves

Ø Mill discharge valves

2.01.00 System Description & conditions:

Designation

Technical data

Number of pulverized coal piping at outlet of mill pulverized coal piping dividers of one boiler

4?10

Pulverized coal piping size upstream of burners

711?13 (711?33 – considering the ceramic lining)

Air-fuel mixture velocity in pulverized coal piping at the set size

23 m/s

Total length of pulverized coal piping per one boiler

4000 m (preliminarily)

Working temperature of air-fuel mixture

95°?

Design pressure of explosion

3.5 kgf/cm2

3.00.00 Electrical Systems

The electrical items shall cover following:

· Motors, Electric Actuators

· Mandatory Spares as specified.

6.00.00 C & I Systems

§ All local sensors and gauges for pressure/temperature and process switch devices, coal feeder control shall be as per process requirements of all associated system and auxiliaries of Coal Feeding system.

§ Valve actuators

§ All instrumentation cables required between Contractor’s equipment’s/devices