ALKEN® CW-883 can be pre-dissolved
externally to the boiler, or small quantities can be added to warm water
in the boiler through a top manhole for fire tube units. If the treatment
is added through a top manhole, any water in the boiler should be cooled
below 200 degrees F (93.34 degrees C). Alternatively, a slurry can be made
of the treatment and added through the top manhole. For water tube boilers,
the mixture can be predissolved and added to the empty boiler through the
feed water tank. For hot water heating boilers, the boiler should be isolated
from the system and vented. After introducing treatment, steam boilers should
be closed and filled to the normal operating level. Water-tube hot water
boilers should be filled to several inches above the tubes.
Steam boilers should be fired and gradually brought up to one-half the
normal operating pressure over a period of 24 hours (but not more than
50 psi). The boiler should be kept at that level for approximately 12 hours,
keeping the water level just above the bottom of the gauge glass. Hot water
boilers should be fired to gradually bring the water to just below normal
boiler temperature over a period of two (2) hours. The temperature should
be maintained at that level for approximately 12 hours keeping the water
level several inches above the tubes.
At the end of the heating period, fire should be drawn, the boiler cooled,
and then drained, preferably from a surface blow. If it is not possible
to drain from the surface blow, draining should be done from the regular
blowdown line. The boiler should then be opened and flushed with a high
pressure hose.
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