g.
Graphic display panel indicating power components.
h.
Lubrication locations.
i.
Electrodes and collecting surfaces.
j.
Platforms, walkways, stairways, and ladders which will be required
for operation, inspection, testing, and maintenance, and furnished
with the precipitator.
k.
Location of field welds, in conformance to AWS D1.1/D1.1M.
1.3.2
Hopper Heater Drawings
Provide layout drawings, wiring diagrams, and control schematics diagrams.
Layout drawings shall show each hopper face including control zones.
1.3.3
Dust Collection System
Submit a full description of the system proposed, including arrangement,
operation, and maintenance of the discharge electrodes and collecting
surfaces. Indicate planned rapping cycle and performance test details and
sampling location. Describe electrodes and collecting surfaces.
1.4
PERFORMANCE
**************************************************************************
NOTE:
1. Select either a collection efficiency or outlet
dust loading condition, whichever is more stringent.
2. The stack emission or efficiency requirements
must comply with (a) weight emission standards; (b)
opacity regulations; and (c) community standards for
visible emissions. Compliance with existing
emission codes may not satisfy the opacity
regulation. Similarly, opacity regulations may not
be as demanding as community standards. A specific
quantitative emission rate must be selected on the
basis of the goals established.
3. Stack opacity is influenced by particle size
makeup. For example, with pulverized coal-fired
boilers, about 45 percent of the ash particles are
below 10 microns in size; for a cyclone-fired
boiler, about 70 percent are below 10 microns; for a
stoker-fired boiler, about 25 percent are below 10
microns. A visually acceptable stack for these
three options might require residuals of 0.046 g/m3
0.02 gr per acf, 0.023 g/m3 0.01 gr per acf, and
0.092 g/m3 0.04 gr per acf, respectively.
4. If it is determined that a spare or additional
precipitator section is desirable to increase
reliability, the specification should be modified so
that the performance can be met with any one section
out of service.
SECTION 15862N
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