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© CBW Clyde Bergemann Wesel 10.2007
- Rev. 5
On-Load Boiler Cleaning
with Water
March 14, 2014
FPK II – Combustion Chemistry II
Åbo Akademi University, Åbo
Water cleaning systems
SMART CANNON™:
• Large boilers > 4 m cross section
• Selective cleaning of heating surfaces
SCS:
• „Slim“ boilers < 4 m cross section
• Cleaning of platen-type heaters
• Areas without any access from side walls
Sootblower operated with water:
• Superheater areas
• Boilers with severe deposition
Combinations hereof
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Cleaning Medium Water
Sudden expansion
Deposits break off
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Water
Deposit
Water droplets evaporate due to excellent
heat transfer
Water/Steam
Water penetrates into the porous deposits
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SMART Cannon WLB CB 100
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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SMART Cannon WLB CB 100
Concentrated water jet crosses furnace or empty passes
Cleaning of opposite wall by means of predefined cleaning patterns
Nozzle size, water pressure and amount are case specific
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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The System SMART CANNON™
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Water Cannon for Furnace Cleaning
Minimum tube wall material thermal effect
One WLB substitutes approx. 15 wall deslagger
Flexible cleaning pattern (individually adjustable to
each boiler, up to 40% larger cleaning area)
Cleaning in difficult accessible areas
like hopper, middle wall, bull nose etc.
Scientific approved application Know-How from
more than 2.000 installations worldwide
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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WtE Installation – Top View of Boiler
1. pass
2. pass
3. pass
WLB
WLB
WLB
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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WtE Installation– The Cleaning Effect
View into
2nd pass
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Incineration of municipal/industrial waste
TFluegas
.
Q
Reduced heat transfer in
the radiation passes
High fluegas temperature
in front of first
superheater
Heat transfer is
shifted to the
convectional part
of the boiler
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Installation Areas – Shower Cleaning (SCS)
Efficient Cleaning of:
- Boiler roof
- Membrane walls
- Platen heating surfaces
Flanges /
Guiding tubes
Spray pattern
Exp.: Spray
pattern
Flange with half
opened valve
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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SCS – “Stand Alone“
Water supply
CE-compliant safety covers
Hose recoiler
Connector
Control/Power circuit
Advanced hose-feeding mechanics.
Feeding velocity is adjustable providing optimal cleaning effect
Heat-resistant hose made of stainless steel
Accurate penetration depth and feeding velocity
monitoring
High performance spray nozzle
with variable spray pattern
Sealing air fan
Boiler outlet flange
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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SCS Nozzle Designs
Standard Nozzle
(Splash Plate)
Jet Nozzle
5 – On-Load Boiler Cleaning with Water
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SCS Instrumentation Module
One instrumentation module for the full cleaning system
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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The SCS Product Family
Fully automated system
Modular design concept
Boiler specific solution
Easy to install
Based on experienced standard solutions
High level of development
“Stand-Alone”:
Compact but effective solution for
boilers with a lack of space.
Fully automated.
“Single-Row”:
Solution for multiple row-forming
penetration points.
Cleaning sequences are
programmable.Fully automated
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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“Multiple-Row”:
Advanced solution for multiple arrayforming penetration points.
Cleaning sequences are
programmable.Fully Automated
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Shower Cleaning System (SCS)
Waste
incinerators
Biomass
boilers
Refuse
Derived Fuels
(RDF) boilers
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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WtE Installation – Temperature Reduction
Flue gas temperature in front of superheater
Load
670 °C
Temperature left side
570 °C
Temperature right sight
30 cleaning cycles per section
Start:
Max. boiler load is limited to 90%
of design boiler load because of
fluegas temperature in front of
superheater (670°C)
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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15 h
Stop:
Max. boiler load 100%
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SMART Helix Water
Waste
incinerators
Biomass
boilers
Refuse
Derived Fuels
(RDF) boilers
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Deposit severity
Deposit hardness
Moderate
5 – On-Load Boiler Cleaning with Water
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High
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SMART Helix Water
Superheater Cleaning with Water
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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SMART Helix Water
Cleaning modes:
„Go-Stop-Clean-Go“ mode
Flexibility in adjustment of
cleaning parameters:
axial and rotational speeds
blowing angle
cleaning intensity
oscillating mode
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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SMART Helix Water
Superheater Cleaning with Water
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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SMART Helix Water
Superheater Cleaning with Water
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Example Waste Incinerator
Travel: 7.500 mm
Fuel: biomass +
waste wood
5 – On-Load Boiler Cleaning with Water
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Example Waste Incinerator
SMART Helix
Water
Existing steam
sootblower
5 – On-Load Boiler Cleaning with Water
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Example Waste Incinerator
Target value for pressure drop below 1 mbar
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Example Lignite fired Boiler
Fuel:
850°C
Lignite
SMART Helix Water
Fluidised bed
Cleaning frequency based on heat
transfer efficiency
Steam Sootblower
Use of SMART Helix Water up to 5
times a day to increase heat transfer
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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Example Lignite fired Boiler
Cleaning efficiency
Before
5 – On-Load Boiler Cleaning with Water
© CBW Clyde Bergemann Wesel
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After
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Titel der Präsentation
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