2.12.22.4
Bottom Ash Hopper Local Control Stations
Provide a wall mounted, NEMA 250, control station at each bottom ash hopper
with front access door, lock, circuit breakers, selector switches, lights
and push buttons.
a.
Selector Switches:
(1) Crusher: three position switch, "Reverse
(momentary)-Off-Forward"
(2)
Rotary Valve Intake:
two position switch "Open-Close"
(3)
Vertical Lift Door:
position switch "Open-Intermediate-Close"
b.
Emergency "Stop" Pushbutton, For clinker crusher, with manual
reset.
(1)
"On-Manual"
(2)
"Crusher Stalled"
2.13
AIR POLLUTION CONTROL EQUIPMENT
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NOTE: Mechanical cyclone collectors should be used
for soot blowing and as a prefilter on baghouse
fabric filters or electrostatic precipitators. The
fabric filter should be used where necessary to meet
local, state or federal regulations or statutes for
particulate emissions, when sulfur emissions are
within regional limits through the burning of low
sulfur "compliance coal." When coal containing more
than 2 percent sulfur is burned, an electrostatic
precipitator is generally more economical for
control of particulates than the fabric filters,
when sulfur emissions will meet regional
limitations. When sulfur emissions are not within
the regional limits, a scrubber with a prefilter
mechanical cyclone and possibly a baghouse filter
may be required to meet the emission limitations.
**************************************************************************
2.13.1
Mechanical Cyclone Collectors
As specified in Section 15861N MECHANICAL CYCLONE DUST COLLECTOR OF FLUE
GAS PARTICULATES.
2.13.2
Fabric Filter Baghouse
As specified in Section 15863N FABRIC FILTER DUST COLLECTOR OF FLYASH
PARTICULATES IN FLUE GAS.
2.13.3
Electrostatic Precipitator Filters
As specified in Section 15862N ELECTROSTATIC DUST COLLECTOR OF FLUE GAS
PARTICULATES.
SECTION 15502N
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