Collecting Electrodes
Enhancements to the 'B' design collecting plate of the 1960's
Upper Hanger System The original thickness of the
'B' Carrier Plate was 10 ga. Material. This has since been increased to 3/16" thick plate. Rounded corners were
also added to the slots in the 'B+' carrier plate to reduce the potential for cracks to develop from the corners
under long-term impact forces. A Reinforcement Clip was added to the current design
to increase the strength of the connection from the channel support to the carrier plate and provides for better
distribution of the rapping forces to both rolled panels.
Collecting Plate Panel The collecting plate panel
has been significantly changed from the time of the original 'B' collecting plate panel. Form the sketch, it can
be seen that the original profile has been strengthened for the current design. The original profile had a rolled
edge in the shape of a 'G' and was 1 ¾" wide. The current rolled edge is more square, deeper, and has a width of
2". The resulting profile results in a more rigid panel that is less susceptible to warpage over time.
Lower Alignment System The original 'B' collecting
lower alignment system used a pipe which was passed through a closed loop attached to the bottom of the collecting
plate panels to maintain alignment. This design, however, was prone to the potential for fly ash to become trapped
in the space between the pipe and loop, effectively preventing any movement needed for transitional expansion. The
current design uses a 'flat bar type' alignment bar to maintain alignment. The bottom of the collecting plate panels
has an open bottom tab that slips over the sides of the bar. The open bottom reduces the potential for fly ash to
become trapped and the collecting plate panels are free to move vertically during transitional expansion periods.