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2 Description UTSP
2.4.1
Automatic boiler tube cleaning (optional)
The thermally insulated boiler door swings out
fully to enable proper cleaning of all boiler pass-
es. A powerful blast of pressurised air cleans the
inside of the boiler tubes. The air rapidly cleans
loose ash particles sticking to the inside of the
tubes. The dense blast of air is created through
the use of special valves with extremely high air
throughput in a short opening time. This clean-
ing principle ensures that the tubes remain clean,
reducing cleaning work and keeping flue gas
temperature down. The result is an improved
boiler efficiency.
•
Quick-closing valves installed in boiler door
•
Compressed air tank directly in front of the
valves, with pressure switch and safety valve
•
Automatic valve control with adjustable
cleaning interval
Before carrying out any maintenance work on the automatic boiler tube cleaning
system, the compressed air tank of the cleaning system must be disconnected from
the air supply (e.g. by closing the ball tap or releasing the quick-action coupling on the
compressor). The compressed air tank of the cleaning system must then be vented by
opening the drain valve. During maintenance work the drain valve must remain open.
When opening the combustion chamber or boiler door, activation of boiler tube
cleaning is blocked by opening of the door limit switch. The safety valve must be
serviced or replaced in accordance with specific national regulations. When carrying
out maintenance work wear the protective gear.
2.4.2
Automatic ignition (optional)
Automatic ignition is performed with an industri-
al hot air blower installed on the side of the com-
bustion system. The fuel is ignited automatically
directly in the combustion chamber. The auto-
matic ignition consists of:
•
Electrical hot air blower
•
A console with mounting bracket
•
An ignition tube from the blower to the com-
bustion retort made of fire-proof steel
•
Electrical control unit for the lighting proce-
dure
D-24
Fig. 6
Automatic boiler tube cleaning unit
Fig. 7
Automatic ignition unit
Underfeed grate UTSP
1.10 en
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