require a reagent recycle system. Life cycle cost
analyses indicate that the reasonably expected lime
savings do not justify the additional capital and
operating costs for a recycle system. Proposers or
bidders including a recycle system as an essential
portion of their process must include in their scope
of supply equipment and material required for a
complete and operational recycle system including
all necessary instrumentation and controls. The
proposer's or bidder's scope of supply must include
all ash handling and conveying equipment associated
with the recycle system.
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Equipment to be provided under this contract includes the items listed
below and other equipment required for a complete and operable FGD system
although not specifically mentioned in these specifications. The following
items are listed for the convenience of the Contractor in understanding the
scope of supply.
2.2.1
Spray Dryer Sulfur Dioxide Absorbers
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NOTE: Air compressor is specified in paragraph
entitled "Two-Fluid Nozzle Atomizers."
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Provide spray dryer sulfur dioxide absorbers, complete with slurry
atomizers, inlet gas dispersers, conveying system for continuous removal of
absorber products, absorber product holding bin(s), frames for penthouse
and hopper enclosures, mechanism for atomizer removal, and spare atomizers.
For systems utilizing two-fluid nozzle atomizers, provide a dedicated air
compressor system to provide air for slurry atomization.
2.2.2
Fabric Filter Baghouse
Provide fabric filter baghouses, complete with inlet and outlet manifolds,
pulse jet or reverse gas cleaning systems, bags, bag attachment and support
hardware, and frames for penthouse and hopper level enclosures.
2.2.3
Lime Slurry Preparation System
Provide lime slurry preparation system including lime feed bin, fill pipe
and truck unloading connection, bin vent filter, bin vibrators, lime
feeders, slakers, grit removal equipment, slaker product tank, agitators,
and drives. Provide accessory equipment and control panels to control lime
slurry preparation system. Provide tanks as required by specific system
design including slurry mixing tanks, feed tanks, and head tanks.
2.2.4
Pumps, Valves, and Motors
Provide pumps including slurry feed pumps and process water pumps. Provide
sump pumps as required as a result of the specific system design. Provide
water, slurry and air piping (excluding field-installed instrument air
tubing), piping support systems, valves, and expansion joints required for
the FGD system within the battery limits indicated. Provide electric
motors for induced draft fans, pumps, and other equipment included in this
system. Provide motor control centers as required for motors furnished
under this contract rated at 480 volts and less. Provide separate motor
SECTION 15864N
Page 27
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