Combustion stability monitoring system RSS-3 for pulverised coal-fired boilers0 pages

BOILER Service Solutions

Combustion Stability
Monitoring System RSS-3
Alstom’s Combustion
Stability Monitoring
System (RSS-3) is a
cost saving add-on for
pulverised coal-fired
boilers. By combining
flame monitoring with
advanced stability analysis,
RSS-3 allows cost saving
fuel control decisions to be
made confidently.

Customer benefits

Availability

Combustion stability is
continuously monitored to help
the operator prevent eventtriggered flame outages and
boiler trips.

Flexibility

Flexible operations and cost savings
for pulverised coal boilers
In dynamic, competitive markets, with renewables on the rise, boiler operators are
looking for solutions for greater flexibility, broader load range and safer, clean operations.
Alstom’s Combustion Stability Monitoring System (RSS-3) meets your need for
reliability, savings and safety with a boiler flame instability assessment that allows
more effective operational decisions during start-ups, feeder issues, fuel quality issues,
air distribution issues, tube leakages and clinker falls.
The RSS-3 system comprises four optical sensors for flame monitoring in the visible
and infrared spectra and an evaluation unit, which processes the flame fluctuations and
computes the instability value for display on the local unit or the plant DCS.
The instability readings provided by the RSS-3 allow the operator and DCS programmes
to make confident operational control decisions that can save significant amounts of
auxiliary fuel (gas or oil) during low load, start-ups and extraordinary events. and reduce
the likelihood of boiler trips. At the same time the system also ensures a master fuel trip
to protect the boiler and plant personnel when the flame stability fails.
The system enables typical start-up savings of 0.5 to 1 hour of full auxiliary fuel flow,
meaning around 10% to 15%, and in some cases up to 25% auxiliary fuel savings
(dependent on duration of the turbine start). During load low operation the use of
stabilising burners can usually be significantly reduced resulting in between 25% to 50%
stabilising fuel savings.

SAFETY

RSS-3 provides the highest standards of combustion stability control:

•tBoiler safety according to EN 12952-9
•tSIL 3 system safety in accordance with EN 61 508
•tBoiler protection against unburned powder explosions

TPWR/PRSHT/CSMSRSS/EN/5.2013/FRA/1516

Helps to safely extend boiler
operational range to handle low
demand periods or a wider range
of fuel characteristics without the
risk of costly boiler trips.

Cost reduction

Smart combustion control based
on flame stability information
allows large savings of stabilising
fuel during low load, startups and extraordinary events.
Stabilising burners are used only
when really needed.

RSS-3 optical sensor

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is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is
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