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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
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