33
3-90-233R24_11/13
maintenance
Soot and Flyash: Formation and Need for removal
The products of combustion will contain small particles of
flyash. The flyash will collect in the exhaust venting system
and restrict the flow of the flue gases. Incomplete combustion,
such as occurs during startup, shutdown, or incorrect
operation of the boiler will lead to some soot formation which
will collect in the exhaust venting system. The exhaust venting
system should be inspected at least twice monthly until an
appropriate cleaning schedule is determined.
Fig. 21
Inner refractory lining
The firebox and heat exchanger tube access areas are lined
with high-temperature, fibrous ceramic insulation panels
(much like spacecraft tiles). The surface of these panels is
hardened to resist normal wear from brushing with a non-
metal brush. The panels are not designed to be cleaned with
the scraper or other sharp objects. Caution must be taken
when cleaning these panels because damage to them is not
covered by the warranty. The ash pan slides into the unit on a
rail system. This keeps the ash pan from contacting the sides
and floor refractory panels. Caution must be taken to ensure
there is nothing on the floor surface prior to inserting the ash pan.
Ash removal
It is recommended to remove the ashes when the boiler
is not in operation. This lessens the chances of coming in
contact with hot surfaces. Ashes can be removed while in
operation but, extra care must be taken including wearing
protective gloves.
Open The Firebox door
Swing the latch downward and open the door as shown in Fig. 21.
NOTE:
Keep hopper lid, and firebox door closed during
operation and maintain all seals in good condition. Air leaks
will cause low draft conditions, which will result in feeder
shutdown.
disposal of Ashes:
Ashes should be placed in a steel container with a tight fitting
lid. The closed container of ashes should be moved outdoors
immediately and placed on a non-combustible floor or on the
ground, well away from all combustible materials, pending
final disposal. If ashes are disposed of by burial in soil or
otherwise locally dispersed, they should be retained in the
closed container until all cinders have thoroughly cooled.
Other waste shall not be placed in this container.
Firebox Refractory
Linings
