intelligent sootblowing smart clean - Åbo...
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© C
BW
Cly
de B
erg
em
ann W
ese
l 10.2
007
-Rev. 5
Intelligent Sootblowing
–
SMART Clean
March 16, 2017FPK II – Combustion Chemistry II
Åbo Akademi University, Åbo
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Conventional Boiler cleaning system
2
Cleaning devices
Controls
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Conventional Online Boiler cleaningWall Blower
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Furnace
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Convective part
Conventional Online Boiler cleaningRetractable Sootblower
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Innovative Cleaning technologyWater Cannon
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Innovative Cleaning Technology –Retractable Sootblower with Flexible Helix
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� Operation Principle:
� Dual drive (axial and rotational)
- axial speed: variable
- rotational speed: variable
� Dynamic helix or Go-Stop-Go operating mode
� Blowing pressure: variable
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Intelligent Boiler cleaning
7
Cleaning devices
Controls
SMART ControlPLC
DC
S
Diagnostic
Analysis
Decision
SMART Clean
Selective and targetedcleaning actions
When?Where?How?
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© CBW Clyde Bergemann Wesel - All rights reserved
8
SMART Clean ISB
Decision
Analysis
Diagnostics
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Diagnostic Furnace
� Heat flux measurement
� Wall temperature measurement
� Measurement of furnace exit gas temperature
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.
Diagnostic Furnace
Heat flux measurement
Q = ∆ ϑs
λ
∆ϑ
sλ
= T1 – T2 [K]
= Distance [m]
= Heat conductance value m*KW[ ]
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Diagnostic Furnace
Wall temperature measurement
� Large scale analysis of temperature distribution on furnace walls
� Detection of slagging hot spots
� Cleaning strategy is flexibly adapted to slagging status
In cooperation with
© CBW Clyde Bergemann Wesel - All rights reserved
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Diagnostic Furnace
(AX1, AY1)
(AX2, AY2)
(CX1, CY1)
(CX2, CY2)
(DX1, DY1)
(DX2, DY2)
Wall temperature measurement
� Detection of slagging
� Deduction of cleaning strategy
� Determination ofBlowing figures
� Demand driven
� Flexible
� Automatic
In cooperation with
© CBW Clyde Bergemann Wesel - All rights reserved
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Diagnostic Convective part
� Weight measurement at the heat exchanger
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Diagnostic Convective part
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� Principle of measurement is based on strain gage technology
� Deposits will be registered as weight increase
� Installed at the hangerrods depending on thegeometry of the boiler andthe position of the cleaningdevices
� Specific sensors for local temperature requirements
Weight measurement
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Analysis Convective part
� Thermodynamic Balancing
� Software module for heat exchanger analysis
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Analysis Convective part
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CALCULATED CF
� Compilation of plant specific boiler model
� Calculation of the following values depending on boundary conditions and process data:
� Fuel and flue gas mass flow
� Heat transfer coefficient of each heating surface incl. “Cleanliness Factor”
� Flue gas temperature profile along boiler height
� Boiler efficiency
Analysis Convective part
Cleanliness Factor
CF =Current heat transfer
Reference heat transfer
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Diagnostic Convective part
Combination of measurement dataand thermo dynamic balancing
Without Matrix Clean:Both sootblower levels will be activated for cleaning due to unknown deposit position within the heat exchanger bundle
With Matrix Clean:Only these two single sootblowers which reach the localised deposit will be activated
Analysis result by Matrix Clean:Weight increase by heavy deposit spot
Analysis result by TDM:Heat transfer decreases
SMART Gauge Sensor
Heating surface efficiency
Tout
Tin
weight
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Advantages & Benefits
� Conventional Sootblowing
� Removal of deposits
� Increase of heat absorption
� Prevention of uncontrollable deposits
� Intelligent Online Boiler cleaning
� Conventional sootblowing +
� Higher process flexibility and more flexibility while firing fuel mixes
� Less usage of cleaning media
� Less erosion on the heating surfaces
� Reduced Service and Maintenance
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© CBW Clyde Bergemann Wesel - All rights reserved
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www.clydebergemann.com
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