SR::BCM
Soot Blowing Management
Applications
When coal-fired steam generators are operated,
the ash, which is contained in the coal, fouls the
heating surfaces. This fouling, in turn, reduces
boiler efficiency. To ensure that electricity is
generated as efficiently as possible, the operator
must remove it from time to time. Since the
cleaning process involves costs (blowing
medium, heating surface erosion, etc.) boiler
efficiency can be kept at a high level in the long
term by optimizing heating surface cleaning.
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Extends the boiler’s availability
Reduces erosion damage and running
costs
Benefits of the system
The system delivers the greatest benefits when it
activates the existing soot blowing equipment
(closed-loop operation) fully automatically. When
the system detects that a specific cleaning step is
necessary, SR::BCM generates a signal that the
control system interprets as the start signal for
the respective subroutine.
Figure 1: Example of the presentation of results of soot
blowing management
The most important benefits at a glance
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Fully automatic operation of all cleaning
equipment on the steam generator
Third-party systems (sensor or camerabased) can be easily integrated
Within the scope of the specified blowing
strategy, SR::BCM responds automatically to
changed conditions such as the combustion
of different coal types
Authorized users can make adjustments to
the blowing strategy
The efficiency of the steam generator
remains at a high level
Figure 2: Thermodynamic model of
®
EBSILON Professional
Properties of SR::BCM
The boiler cleaning management System
SR::BCM uses operating measurements in order
to determine the current status of the steam
generator in detail based on this information. The
application of detailed thermodynamic model of
the steam generator provides additional
information that cannot be measured directly.
Important examples of this kind of information
include fouling of each individual heating surface
and the flue gas temperatures in the steam
generator.
SR::BCM
Soot Blowing Management
Soot blowing is optimized by considering the
relevant operating parameters. Typically, the
following operating parameters are the basic
information that is evaluated to optimize soot
blowing:
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fouling of each individual heating surface
flue gas temperature at the end of the
combustion chamber
flue gas temperature behind the
economizer
water injection in the intermediate
superheater (if installed)
Other general conditions in addition to the
thermodynamically relevant parameters are
also considered. To avoid the negative effects
of continuous or too seldom soot blowing,
one defines a minimum and maximum idle
period between two blowing cycles for each
soot blowing group.
In particular, when coal with low-melting ash is
used, the increase in basic fouling of the first
superheater bundle can be only slowed down
but not prevented. In cases such as these,
SR::BCM automatically detects an increase in
basic fouling and adapts the blowing strategy
to these new general conditions.
A fuzzy algorithm optimizes the cleaning
strategy with consideration of the many
different impacting factors. For specific
optimization tasks, this technology offers the
significant advantage that various factors,
which appear to be contradictory, are taken
account of appropriately.
Integrating third-party systems
If the steam generator is to be equipped with a
separate system for a detailed analysis of the
fouling status of the evaporator heating
surface, such as with heat flow sensors or
thermal imaging cameras, this additional
information can also be used to optimize the
cleaning strategy.
© STEAG Energy Services GmbH, v2.02_11/2013
Figure 3: Integration of a heat flow sensor system in
SR::BCM
This information and all further technical advice is based on our present knowledge and experience. However, it implies no liability or other legal responsibility on our
part, including with regard to existing third party intellectual property rights, especially patent rights. In particular, no warranty, whether express or implied, or guarantee
of product properties in the legal sense is intended or implied. We reserve the right to make any changes according to technological progress or further developments.
The customer is not released from the obligation to conduct careful inspection and testing of incoming goods. Performance of the product described herein should be
verified by testing, which should be carried out only by qualified experts in the sole responsibility of a customer. Reference to trade names used by other companies is
neither a recommendation, nor does it imply that similar products could not be used.
STEAG Energy Services GmbH | Rüttenscheider Str. 1-3 | 45128 Essen | Germany
Dr. Georg Händel | Phone +49 201 801-4110
E-mail: [email protected]
www.steag-systemtechnologies.com