Ahs Datasheet a Tce Hzl Bhel

EXHIBIT A - TECHNICAL SPECIFICATIONSECTION: D1.8 DS A

DATA SHEET – A

ASH HANDLING SYSTEM SHEET 1 OF10

1.0 BOTTOM ASH HOPPER

1.1 Number Required ONE (1) FOR EACH UNIT

1.2 Type Of Hopper DRY TYPE REFRACTORY LINED 1.3 Required Storage Capacity Of ABOUT 8 HOURS STORAGE ash in hopper CAPACITY

1.4 Minimum Thickness Of Hopper mm 10 plate

1.5 Type Of Lining MONOLITHIC CASTABLE REFRACTORY

1.6 Type of gate for outlet HYDRAULICALLY OPERATED

1.7 Feed chute to scrapper chain conveyor SS 304 / 316, min. 5 mm thick

1.8 Refractory Cooling Arrangement YES

1.9 Seal Trough Make Up And Flushing YES arrangement

1.10 Flushing Nozzles In The Bottom YES ash hopper

1.11 Seal Trough Material And MINIMUM 6 MM thickness

1.12 Refractory holding anchor SS-304, MINIMUM 3 MM THICK

2.0 SCRAPER CHAIN CONVEYOR

2.1 DESIGN DATA

2.2 Number required One (1) for each unit

2.3 Capacity TPH Contractor to indicate

2.4 Speed of scraper Feeder M/Min Contractor to indicate

2.5 Type of Drive ELECTRIC

2.6 Variable speed required? No

2.7 Final Drive Transmission Chain and sprocket

2.8 Type of Couplings FLUID

2.9 Protective guard for couplings required YES

2.10 Factor of safety for scraper feeder chain Min. Six (6)

2.11 Make of scraper feeder chain RUD.( Indian make will be subject to approval by Owner at detail engineering stage)


DATA SHEET – A


2.12 MATERIAL OF CONSTRUCTION

2.12.1 Feeder Trough MS MINIMUM 10 MM THICK

2.12.2 Scraper Blades ROLLED SECTION WITH SAIL HARD 16 MM THK. LINER ON TOP & BOTTOM

2.12.3 Sprockets FORGED STEEL IS-1570 / CAST STEEL IS 1030

2.12.4 Liner for scraper feed trough MINIMUM 10 MM THICK TISCRAL / SAIL HARD

2.12.5 Material of discharge chute MS, MIN. 8 MM THICK

2.12.6 Liner for discharge chute 5 MM THICK AISI 304

2.12.7 Shaft C-40/C-45

2.13 Side plate angle of discharge chute 70o

3.0 CLINKER GRINDER

3.1 Type of Grinder HEAVY DUTY DOUBLE ROLL/SINGLE ROLL

3.2 Max. Output Size Permissible mm 25

3.3 Is Fluid Coupling Required? YES Suitable for Reversible Operation.

3.4 Materials Of Construction

3.4.1 Rolls MANGANESE STEEL, 12-14%, IS-2763.4.2 Teeth of Rolls MANGANESE STEEL, 12-14%, IS-2763.4.3 Wear Plate/Liner ALLOY CI AS PER IS-4771, TYPE 1(a)-450 BHN

3.4.4 Grinder Chamber MILD STEEL, WITH Mn STEEL/ ALLOY CI LINERS

3.4.5 Shaft ALLOY STEEL

3.4.6 Shaft Sleeves SS-410

3.4.7 Chain Guard 6 MM THICK MS PLATES

3.5 Notes

The clinker grinders with its drives shall be mounted over the rails. Length of rails shall be adequate to pull out the clinker grinder completely outside and position the other clinker grinder in operating position.


DATA SHEET – A


4.0 BELT CONVEYOR No.BC-BA-1 & BA-2

4.1 Capacity Contractor to indicate

4.2 Speed m/sec. Contractor to indicate

4.3 Material Bottom ash

4.4 Paricle Size (mm) 25 max.

4.5 Type of belt Belt shall be of Nylon - Nylon. The cover shall be heat resistant grade type.

4.5.1 Minimum thickness of cover (mm) Top – 5 /Bottom – 2

4.5.2 Belt Rating/ No. of plies 315/3 ( Minimum )

4.5.3 Ratio of working tension to allowable tension (%)

90 %( maximum )

4.5.4 Belt width (mm) Contractor to indicate (Min. width shall be 500 mm)

4.6 PULLEY

4.6.1 Type Heavy duty type. Minimum shell thickness 10 mm

4.6.2 Lagging 12 mm thick herring bone grooved type rubber lagging for drive pulleys and 10 mm thick plain type for non-drive pulleys.

4.6.3 Bearing life (Hrs.) 30,000

4.6.4 Pulley width (mm) As per IS standards

4.7.0 IDLERS

4.7.1 Carrying idlers Carrying idlers shall be of 3 roll, 20 deg troughing. Roller dia. 114.3 ‘C’ class pipe, Spacing – 1200 mm

4.7.2 Return idlers Return idlers shall be of single roll type. Roller dia. 114.3 Class ‘C’ pipe, Spacing – 3000 mm.


DATA SHEET – A


4.7.3 Impact idlers Shall be of 3 roll type of made out of 89mm dia. Class ‘C’ pipe fitted with 140 dia. OD rubber rings, Spacing - 400mm Min. 5 Nos. impact idlers shall be provided at feed point.

4.7.4 Self aligning carrying and return idlers

Shall be provided on thrust bearing for swivelling. Side guide rollers shall be provided. One No. each shall be provided

4.7.5 Bearings Single row deep groove ball bearing sealed for life

4.7.6 Deck plate Min. 1.5 mm for full length of conveyors

4.8 Tensioning Arrangement Screw take up / Vertical gravity

4.9 Skirt Board 3 m long of 8 mm thick MS plates fitted with 5 mm SS409 M liner plate and 3.15 mm cover plate.

4.10 Belt Scrapers External - sprung blade typeInternal - 'V' plough type

4.11 Discharge Chute Material - 8 mm thick MS with 5 mm thick SS409 M liner. Side plate angle shall be 70o (Min.)

4.12 Walkway,Structures And Belt Cover Minimum walk way 500 mm width shall be provided on both sides of conveyor, with chequered plate covering. GI hood shall be provided Belt conveyor.However, if the conveyor width is 500 mm and below, walkway of 500 mm width shall be provided on one side of the conveyor only.

4.13 Drive Motor and gear box mounted on conveyor structure itself.

4.14 Height Of Tail Pulley 1.0 m above ground level

4.15 Maximum Slope Of Conveyor Permissible

14o

5.0 PRESSURE TYPE PNEUMATIC CONVEYING


DATA SHEET – A


SYSTEM FOR FLY ASH HANDLING

5.1 Ash Handling System Capacity (Tph ) NORMAL EMERGENCY Contractor to indicate

5.2 Number Of Hrs Of Operation CONTINUOUS/ EMERGENCY - 8 HRS IN 4 HOURS

5.3 Material Properties

5.3.1 Material to be Handled FLYASH

5.4 FLY ASH TRANSMITTER

5.4.1 Type Suitable for pressure type pneumatic conveying

5.5 Materials of Construction

5.5.1 Transmitter Vessel Cast Iron/Fabricated Out Of Ms Plate Of Min. 10 Thk.

5.5.2 Construction of Vessel As Per Asme Code For Unfired Pressure Vessel Or Is-2825

5.5.3 Accessories to be Provided

5.5.4 Level probe for fly ash hopper YES

5.2.5 Level probes for fly ash YES ( if system requires) transmitters

5.5.6 Timers as back up for level YES probes 5.5.7 Safety valve on vessel YES

5.5.8 Control panel YES

5.5.9 Testing of the fabricated AS PER ASME SECTION VIII or IS 2825 transmitter vessels

5.6 Fly Ash Valves

5.6.1 HOPPER ISOLATION VALVES/ KNIFE GATE VALVES BRANCH ISOLATION VALVES

a) Material of Construction and BRANCH ISOLATION HOPPER ISOLATION Hardness

(i) Valve body ALLOY CI 350 BHN CI

(ii) Slide plate SS 304 Edge Stellited SS-304 to Min.1 mm Thickness


DATA SHEET – A


(iii)Valve seat ALLOY CI 350 BHN CI

(iv) Valve shaft SS-316 SS-316

5.6.2 Provision of operating handle YES for manual operation and position indicator

5.7 Fly Ash Inlet Valves

5.7.1 Type DOME VALVES / SWING DISC VALVES / KNIFE GATE VALVE

5.7.2 Location AT INLET TO ASH TRANSMITTER

5.7.3 Operation PNEUMATIC CYLINDER OPERATED -

SOLENOID ACTUATED

5.7.4 Material of Construction & DOME VALVE/ SWING DISC VALVE Hardness KNIFE GATE VALVE

(a) Valve body CI FG 260 ALLOY CI350 BHN

(b) Valve seat CI FG 260 SS STELLITED

(c) Valve plate/dome SS 304 --

(d) Shaft SS 316 SS 316

(e) Seal (for dome valve) INFLATED-- RUBBER SEAL

(NEOPRENE)

(f) Disc --- ALLOY CI350 BHN

5.7.5 Valves at Outlet of Transmitter Vessel

a) Type DOME VALVES/SWING DISC VALVES

b) Operation PNEUMATIC CYLINDER OPERATED - SOLENOID ACTUATED

c) Material of construction Same as 5.7.4

NOTES

All parts of valves coming in contact with ash shall be wear resistant.

All air + ash line valves and fittings shall be tested as per API-598.


DATA SHEET – A


6.0 AIR-ASH TRANSPORT PIPING AND FITTINGS

6.1 Piping ERW MS HEAVY DUTY (FOR AVERAGE CARRYING VELOCITY OF 10 M / SEC.). FOR HIGHER VELOCITY OF AIR ASH MIXTURE, CONTRACTOR SHOULD INCREASE THE THICKNESS OF PIPE SUITABLY.

6.2 Fittings Ni-Cr ALLOY CAST IRON AS PER IS:4771, TYPE 1a WITH MINIMUM 4.5% Ni and HARDNESS OF 550 BHN

6.3 Type of Wear Back for Fittings INTEGRAL

6.4 Min. Thickness of Wearback TWICE THE PIPE WALL THICKNESS

6.5 Radius of 90o bends MINIMUM 5 TIMES PIPE DIAMETER

6.6 Type of coupling for fly ash pipes SLEEVE TYPE WITH STEEL SLEEVE AND STEEL / CI/MS FLANGES

7.0 AIR PIPING

7.1 Conveying Air Piping

7.1.1 Material - Piping GI - Fittings FORGED STEEL

7.1.2 Velocity in air piping 10 M/S (AVERAGE)

8.0 BAG FILTER

8.1 Location AT THE AIR OUTLET OF AND FLY ASH SILO

8.2 Type REVERSE PULSE JET TYPE

8.3 Material of bags POLYESTER NEEDLE FELT OFANTISTATIC TYPE

8.4 Air-to-Cloth Ratio m/min ONE

9.0 EXPANSION JOINTS

9.1 Type of Expansion Joints Stainless Steel Expansion

Joints

10.0 NOTES

1. ALL PARTS OF VALVES COMING IN CONTACT WITH ASH SHALL BE WEAR RESISTANT.


DATA SHEET – A


2. ALL AIR + ASH LINE VALVES AND FITTINGS SHALL BE TESTED AS PER relevant

code.

11.0 FLY ASH SILO AND BOTTOM ASH SILO

11.1 Material of construction RCC FLY ASH SILO AND MS SILO FOR BOTTOM ASH

11.5 Type of Level Measurement and indicator CONTINUOUS/RF TYPE

11.6 Liners for bottom ash silo Bottom ash silo shall be lined with 5 mm thick SS 409M on sloping surface and 50 mm thk guniting on vertical portion

12.0 CONTINUOUS DUST CONDITIONER, UNLOADER AND FEEDER

12.1 Location Below FA silo

12.2 Type PADDLE TYPE

12.3 Maximum moisture content 15%

12.4 Type of feeder above unloader AIR LOCK TYPE ROTARY FEEDER

12.5 Material of construction

12.5.1 Trough M.S. 6MM THICK WITH SS 4105 MM THICK LINERS.

12.5.2 Top cover plate M.S. 6 MM THICK 12.5.3 Shaft SS 316

12.5.4 Paddles SS 304 - WELDED TO SHAFT

12.5.5 Spray nozzles Stainless steel

12.5.6 Type of gate at silo outlet Cylinder operated Knife Gate Valve

12.6 Notes

12.6.1 Water supply to spray nozzles shall be adjustable so as to condition the fly ash in order to control dust nuisance, without causing ash slurry formation.

13.0 HORIZONTAL CENTRIFUGAL PUMPS

13.1 Application WATER

13.2 Max. Rated Speed (At 50 Hz) rpm 1500

13.3 Pump Efficiency % MIN. 70%


DATA SHEET – A


13.4 13.5 FEATURES OF CONSTRUCTION

13.6 Type of Pump SPLIT CASING / SINGLE/DOUBLE

13.7 Impeller Closed type

13.8 Volute SINGLE

13.9 Materials Of Construction

13.9.1 Impeller and impeller ring (M,U,P) }}

13.9.2 Casing and casing ring (M,U,P) }} CI casing, Bronze impeller

13.9.3 Diffuser }

13.9.4 Shaft (M,D,U) SS-316

13.9.5 Shaft Sleeve (M,D) SS-316

-

13.10 Tests

13.10.1 For the Components marked 'M', Material Test Certificates Shall be Furnished

13.10.2 For the Components Marked 'U', APPLICABLE ASTM STDs Ultrasonic Test Shall be conducted

13.10.3 For the Components Marked P Magnetic particle test shall be Magnetic Particle Inspection conducted on machined surface

Shall be Carried Out

13.10.4 For the Components Marked D, DYE Penetration Test shall be Conducted


DATA SHEET – A


Ahs Datasheet a Tce Hzl Bhel

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