9. Minimum casing design pressure and vacuum is
usually 3735 Pa 15 inches WC.
10. Minimum design for dust on plates should be
based on 6 mm 1/4 inch of dust on all internal
surfaces assuming a dust weight of 640-1600 kg/m3
40-100 lb/ft 3.
**************************************************************************
Apply the following construction criteria to each of the
electrostaticprecipitator(s). Base applicable criteria on flow conditions
at maximum continuous rating specified in paragraph entitled "Inlet Gas
Conditions."
a.
Minimum required collection efficiency, percent [_____]
b.
Minimum number of fields in direction of gas flow [_____]
c.
Minimum effective treatment time, seconds [_____]
d.
Minimum effective treatment length, meter feet [_____]
e.
Minimum number of electrically isolatable bus sections per
mechanical field [_____]
f.
Maximum collection area per electrically separate bus sections,
square meter feet [_____]
g.
Maximum number of electrically separate bus sections per
transformer-rectifier [_____]
h.
Maximum number of gas passages per bus section [_____]
i.
Minimum number of transformer-rectifier sets per mechanical field
[_____]
j.
Gas velocity minimum through precipitator, m/s fps[_____]
k.
Minimum specific collecting area, square meter per 305 cubic meter
feet per 1000 acfm [_____]
l.
Maximum vertical height of discharge electrodes, meter feet[_____]
m.
Maximum vertical height of collecting electrodes, meter feet
[_____]
n.
Range of plate spacing, mm inches [_____] to [_____]
o.
Minimum discharge electrode cross-sectional area, square mm inches
[_____]
p.
Maximum horizontal length of each electrical field, meter feet
[_____]
q.
Minimum aspect ratio [_____]
r.
Maximum pressure from [_____] to [_____] Pa inches watergage
[_____]
SECTION 15862N
Page 21
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