Fulton FB-S Horizontal Firetube Boiler - Manual (Page 30)

The Fulton Companies*FB-S Series Manual*Version 2010-0820 rev. 3/5/13
Page 30
because they lower the heat transfer rate and could cause over-heating of a tube.
Before boiling out procedures may begin, the burner should be ready for firing. The
operator must be familiar with the procedure outlined under burner operation.
Warning
Use of a suitable facemask, goggles, rubber gloves, and protective
garments is strongly recommended when handing or mixing caustic
chemicals. Do not permit the dry material or the concentrated solution to
come in contact with skin or clothing. Failure to follow these instructions
could result in serious personal injury or death.
b) The suggested general procedure for clearing a boiler is as follows:
i. Have sufficient cleaning material on hand to complete the job.
ii. When dissolving chemicals, the following procedure is suggested.
Warm water should be put into a suitable container. Slowly
introduce the dry chemical into the water, stirring it at all times
until the chemical is completely dissolved. Add the chemical slowly
and in small amounts to prevent excessive heat and turbulence.
iii. Isolate the boiler from the system by shutting off the main steam
valve.
iv. Remove the steam safety valve.
v. Water relief valves and steam safety valves must be removed
before adding the boil-out solution so that neither it nor the grease
which it may carry will contaminate the valves. Use care in
removing and reinstalling the valves.
vi. All valves in the piping leading to or from the system must be
closed to prevent the cleaning solution from getting into the
system
vii. Replace the steam safety valve.
viii. Fill the boiler with water. Water level is about center in the water
gauge glass.
ix. Generate 5 PSI (1.054 kg/cm2) of steam and shut off the boiler.
Allow this hot solution to remain in the boiler for 10 minutes.
x. Allow the boiler to cool to <140F.
xi. Drain and flush the boiler twice with fresh water.
xii. To remove all the oil and dirt from the main steam and the
condensate return lines, allow the returns to go into a floor drain or
a safe discharge point for the first few days of operation.