Boiler 1125 psi BI-DRUM

Operating Condition Capacity

46% MCR

56,000

100% MCR

120,000

Peak Load

160,000

THERMAL & PRESSURE DATA

Final Steam Temperature: 900 °F

Feed Water Temperature: 290 °F

Superheater Outlet Pressure: 900 PSIG

Design Pressure: 1,050 PSIG

WATER HOLD-UP

Weight of Water in Boiler (Cold to NWL): 59.3 Tons

Economiser Water Weight: 2.5 Tons

STEAM DRUM

Internal Diameter: 60" I.D.

Cyclones: 27 × 11" Steam Cyclones

Type: Conical

Arrangement: Two rows – scrubbers – inclined primary

Material Specification: Boiler quality steel plate B.W 67B

WATER DRUM

Internal Diameter: 48" I.D.

Material Specification: Same as furnace

Construction:

Water-cooled walls

Membrane construction

2 tubes on a 3"

pitch

FRONT WALL

Tube Size: 21⁄2" O.D. × 9 W.G. (0.144")

Material: Medium Carbon Steel BW85

Tube Quantity: 64 tubes

Pitch:

3" tube pitch

Enter steam drum on 6" staggered pitch

Burners:

Oil burners located on front wall

3 bottom headers

REAR WALL

Tube Quantity: 64 tubes

Tube Size: 21⁄2" O.D.

× 9 W.G.

Material: Medium Carbon Steel BW85

Function:

Forms superheater enclosure floor

Enters water drum in two rows

Pitch: 6"

staggered pitch

Bottom Headers: 3 off

SIDE WALLS

Tube Quantity: 79 tubes

Tube Size: 21⁄2" O.D.

Material: Medium Carbon Steel BW85