feeding methods can vary but many include the use of chemical
solution tanks and proportioning pumps or special ball briquette
chemical feeders and others
In general, steam boiler chemicals (phosphates, caustic, etc.) are added directly to the feed-water
or the feedwater line. Each application requires a
methodology that produces the most effective chemical addition.
Chemicals used to prevent condensate system
corrosion may be fed directly to the steam or into the feed-water
system, depending on the specific chemical used.
Continuous feeding is preferred but intermittent
application will suffice in some cases.
systems are usually fed using a by-pass feeder. They can
also be controlled using a falling set-point controller and
other more sophisticated devices.
introduction of chemical is frequently a decisive factor in
overall performance of the chemical treatment program. It
is also decided by convenience and space availability in