TM 5-815-1/AFR 19-6
discharge wire from displacement by attachment to a
trodes are supported from the top and kept in
suspended weight. The wires can be made stiff consist-
alignment by guides at the bottom. Rigid elec-
ing of a formed sheet, or they can be simple variations
trodes are the least susceptible to breakage.
c. Collection electrodes. There are numerous types
of the normal straight round wire such as being barbed
or pronged. Steel alloys are commonly used for wire
of collection electrodes designed to minimize
construction, but actually any conducting material with
reentrainment and prevent sparking. The material used
a proper configuration and sufficient tensile strength
in construction, however, must be strong enough to
can be used.
withstand frequent rapping. In order to insure correct
(1) Rigid frame discharge electrodes. Rigid
electrode application, it is wise to see if the electrode
frame designs incorporate a framework which
chosen has exhibited good performance at similar
supports the discharge electrodes. By using
installations.
d. Hoppers. A hopper is used to collect ash as it falls
the rigid frame design the need for wire
from the precipitator. The hopper should be designed
weights is eliminated since the frame keeps
using precautions against corrosion in the precipitator
the wires properly supported and aligned.
as any leakage due to corrosion will enhance entrain-
(2) Rigid electrodes. The rigid electrode design
ment. If the precipitator is dry, a hopper angle should
uses electrodes that have sufficient strength to
be chosen that will prevent bridging of collected dust.
stay in alignment their entire length. The elec-
8-4
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