Fulton Electric (FB-L) Steam Boiler - Manual (Page 34)

Carboxylated Copolymer, Polyacrylate or a
combination of these dispersing agents
should be fed at a rate that would be
considered the mid range for the sludge
dispersant during normal operating
conditions. The mixing of these dispersing
agents into the boiler water in order to
insure a clean boiler is as important as the
required use of the previously discussed
treatment chemicals.
If the circulating pump method is not
practical, then if mixing is required, the
boiler will have to be accomplished through
light steaming. In this case, the proper
levels of treatment chemicals will have to be
built up during the week prior to the boiler
going off the line. IF this is the method to be
used, then increase the chemical treatment
levels to; 500 – 800 ppm OH Alkalinity, 100
pm Residual Sodium Sulfite and Maximum
Range Feed for the Sludge Disperant. This
will supply the boiler water with sufficient
treatment chemicals to maintain itself within
the desired limits as the boiler sits and
some water is slowly lost.
Deaerated water should be used to fill the
boilers that are going to be in standby
service, when even it is available.
A convenient method for keeping a boiler
full of water is to connect a small expansion
tank to some connection at the top of the
boiler. This tank is to be located above the
boiler and is to be kept filled with chemically
treated water. If the tank remains full, then
the boiler will remain full. If the tank over
flows, then the boiler is taking on water from
some form of system leakage. It is
convenient for maintaining the proper level
of chemical treatment protection as well as
acting as a level control indicator.
Electric IOM
Maintenance
30