control centers for each spray dryer absorber-baghouse unit, and for the
lime slurry preparation system, complete with internal controls wired and
interlocked together and brought out to terminal blocks for remote field
connection by the Contractor.
2.2.5
Ductwork and Draft Equipment
Provide induced draft fans including inlet boxes, dampers, and drives.
Provide ductwork between [economizer][air heater] outlet interfaces and
stack inlet including spray dryer absorber bypass reheat ducts, as
necessary. Provide test ports. Provide expansion joints, turning vanes,
dampers, damper operators, and seal air systems including fabric filter
baghouse dampers. Provide gas distribution devices in ductwork ahead of
baghouse to assure even flow of gases into baghouse.
2.2.6
Instrumentation and Control Devices
Provide system controls and instrumentation including local control panels
and a remote control panel to be located in the main plant control room.
2.2.7
Structural and Miscellaneous Steel
Provide structural and miscellaneous steel including structural steel for
support of equipment, ductwork, platforms, walkways and stairs, and
miscellaneous framing. Provide stairs, walkways and access platforms, and
as required for normal operation and maintenance.
2.3
SITE FABRICATED AUXILIARY CONSTRUCTION
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NOTE: Penthouse and hopper enclosures shall be
specified. Enclosed areas improve maintenance and
lower heating requirements.
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Provide concrete foundations with anchor bolts conforming to ASTM A 307for
structural steel columns and equipment. Also, provide metal siding and
roofing, insulation, doors, windows, and heating and ventilating equipment
for spray dryer sulfur dioxide absorber, for fabric filter baghouse
penthouse and hopper enclosures, and for the lime slurry preparation system
enclosure. Provide insulation and lagging including necessary subgirts for
spray dryer sulfur dioxide absorbers, baghouses, and ductwork. Also,
provide insulation and heat tracing for piping, as necessary, and in
accordance with the equipment specification requirements. Provide a remote
bulk lime storage silo, conveying system, and piping for connection to
Contractor's lime feed bin fill piping. Provide ash conveying equipment
from hopper flanges on the fabric filter baghouses and the absorber product
holding bins. Also, water storage tanks along with potable (non-process)
water piping, fire protection water piping, and field-installed instrument
air tubing. Provide electrical field wiring and conduit, lighting, and
motor control centers for 4,000-volt motors.
2.4
SITE CONDITIONS
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NOTE: Dry and Wet Bulb Temperature and Duration:
SECTION 15864N
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