degrees C 30 degrees F. Operating temperatures will be maintained at or
above these levels during performance testing. The Contractor shall
guarantee the maximum pressure drop across the entire system at design flue
gas flow rate. The Contractor shall guarantee that the sound levels
specified for the baghouses, pumps, motors, and valves will not be exceeded.
2.7
SPRAY DRYER ABSORBERS
**************************************************************************
NOTE: Dry and Wet Bulb Temperature and Duration:
Temperature
Frequency of Occurrence
Parameter
Season
(Degrees C)
of Higher Temperatures
Dry Bulb
Dec.-Feb.
[______]
[______]
Dry Bulb and
June-Sept.
[______]
[______]
Mean Coincident
Wet Bulb
Wet Bulb
June-Sept.
[______]
[______]
Temperature
Frequency of Occurrence
Parameter
Season
(Degrees F)
of Higher Temperatures
Dry Bulb
Dec.-Feb.
[______]
[______]
Dry Bulb and
June-Sept.
[______]
[______]
Mean Coincident
Wet Bulb
Wet Bulb
June-Sept.
[______]
[______]
**************************************************************************
Furnish and deliver [_____] spray dryer absorbers, complete with slurry
atomizer units and accessories for a complete and operable installation.
Each spray dryer absorber shall meet the performance criteria specified in
paragraph entitled "Sulfur Dioxide Removal Performance Guarantees." The
absorbers shall be constructed of steel plate of 6 mm 1/4 inchminimum
thickness, conforming to ASTM A 36/A 36M. Structural steel design shall be
as specified in paragraph entitled "Structural and Miscellaneous Steel."
Structural design temperature range shall be [_____] to 204 degrees C 400
degrees F. External stiffening ribs shall be spaced as required to provide
support for the vessel shell, equipment, walkways, penthouse, monorail, and
hoist. Stiffeners shall be sized and positioned to provide a uniformly
curved surface for the installation of insulation and lagging. Structural
welded seams shall be seal welded. Joints shall be provided so that they
can be assembled airtight. Each spray dryer absorber shall be provided
with the necessary framing for a penthouse to provide shelter of atomizers,
motors, lubrication systems, control devices and other equipment located
above the spray chamber. Emergency eyewash stations shall be provided in
each penthouse. Potable water piping to eyewash stations will be provided
by the Contractor. The penthouse design shall be such that the overall
cylindrical appearance of the absorber shall be maintained. The rotating
assembly of each atomizer unit shall be tested for dynamic and static
balance using the actual driver. Complete test reports shall be submitted
to the Contracting Officer. Notify the Contracting Officer, in writing, at
least 20 days in advance of the tests so that he or his representative can
SECTION 15864N
Page 39
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