MIL-HDBK-1165
periodically released from the boiler to remove accumulated
solids and sediments. For a more detailed discussion of boilers
and steam generators refer to MIL-HDBK-1152, Inspection and
Certification of Boilers and Unfired Pressure Vessels.
5.4.3.1
Operation and Maintenance Procedures. The following
procedures will help conserve water in your boilers and steam
a)
Inspect the condensate return system, or install
one.
b)
Inspect equipment regularly.
c) Locate and repair leaks in the steam traps and
distribution system. Escaping steam wastes water and energy.
The steam traps can also be easily replaced, if needed.
d) Limit the amount of blow-down to the minimum
required for properly flushing the system and reaching the
desired water quality.
5.4.3.2
Retrofits. Install a condensate return system. This
allows the condensate to be returned as make-up water, saving up
to 50 - 70 percent of water use, while lowering operational costs
due to the higher temperature feed water.
5.4.3.3
Replacements. Unless the existing boiler is very old
or beyond repair, it may be much more cost-effective to follow
the suggestions above rather than to replace the system.
Replacement systems vary according to size and application.
Consult a system vendor for advice about your facility.
5.4.3.4
Chemical Use. The addition of corrosion and scale
inhibitors will aid the boiler to work more efficiently, extend
its life, and reduce water consumption due to a lessened blow-
down demand. Condensate return piping should also be chemically
treated to reduce the corrosive effects of entrained oxygen and
carbon dioxide. However, chemical use should be minimized when
possible, in order to help the installation meet its pollution
prevention goals.
5.4.3.5
Water Recycling, Reclamation, and Reuse. Depending on
the water quality, boiler blow-down may be reused for other water
consuming applications such as irrigation.
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