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Coal-fired power plant Chapter 8 141
8.1.9 Equipment descriptions—Ductwork and breeching and bottom
ash handling system
Ductwork and Breeching
Install ductwork and breeching and expansion joints. Fit up and seal welding
from inside. Fit up flanges tack welded to sections to install and bolt field
joints.
Ductwork will rest on sliding supports or hang from supports.
Bottom Ash Handling System
Equipment consists of refractory-lined bottom ash chute and one (1) sub-
merged ash drag chain conveyor.
Bottom ash chute
Submerged ash drag conveyor with outlet chute.
Shipped in sections:
Head section—motor and drive shipped attached to head
Neck section
Transition section
Straight section
Tail section—take up shipped assembled
Scope of work:
Assembly of housing
Assembly of drag chain
Installation of drive units
Pneumatic/hydraulic take-up units, including air piping
Discharge chutes
Grouting
Refractory-lined chute on inlet of submerged ash drag
All water piping to and from submerged ash drag and drains
Coal-Fired Boiler