© C
BW
Cly
de B
erg
em
ann W
ese
l 10.2
007
-Rev. 5
On-Load Boiler Cleaning
with Steam
March 16, 2018FPK II – Combustion Chemistry II
Åbo Akademi University, Åbo
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
Content
� Steam sootblower solution
� Different types of steam sootblowers
� Functional aspects
� Deposit removal
� Selection of sootblowers
� Important design aspects
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
3
Sootblower
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
4
Sootblower in operation
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
54 - On-Load Boiler Cleaning with Steam
Cleaning mechanism –Retractable sootblower
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
64 - On-Load Boiler Cleaning with Steam
Cleaning mechanism - Part Retractable sootblower
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
Content
� Steam sootblower solution
� Different types of steam sootblowers
� Functional aspects
� Deposit removal
� Selection of sootblowers
� Important design aspects
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
8
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
“On-load“ Cleaning Systems
� Cleaning systems for the furnace
Blowing medium: water
SMART Cannon
Blowing medium: steam
Wall blower VS-H
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Wall blower VS-H
Functional principle
� The nozzle head with two opposite high-performance nozzles is axially moved into the boiler
� The blowing process begins as soon as the nozzle head has reached the blowing position
� During this process the tube wall is cleaned in circular form
� A special valve control also enables cleaning of specific segments
� After performing the necessary number of rotations the nozzle head returns to its rest position
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Wall blower – Cleaning pattern
Travel
Nozzle inclination
Geo
met
rical
blo
win
g ra
dius
Ope
ratin
g ra
dius
Jet
dive
rsio
n
Res
t P
ositi
on
Rev
erse
P
ositi
on
Spiral cleaning pattern due to wall blower type that advances into theboiler as it cleans
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
12
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Retractable Sootblower
Functional principle
� The lance tube with two opposite high-performance nozzles, is helically moved into the boiler
� Consequently the blowing process begins shortly after the two nozzles have passed through the boiler wall
� During the blowing process the lance tube continues to move helically into the flue-gas path
� On reaching the end of travel position, the direction of movement changes and the lance tube returns to its rest position
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
14
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Part Retractable Sootblower
Functional principle
� The blowing tube of the part retractable sootblower is equipped with high-performance nozzles over the whole length and is movably supported in the flue-gas path
� During the blowing process the blowing tube continues to move helically into the flue-gas path
� On reaching the end of travel position, the direction of movement changes and the blowing tube returns to its rest position
� The blowing tube remains partly in the flue-gas path
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Oscillating Sootblower
Functional principle
� The lance tube with high-performance nozzles is moved in the boiler in oscillatory motion
� The blowing process begins as soon as the nozzles have passed through the boiler wall
� On reaching the end of travel position, the direction of movement changes and the lance tube returns to its rest position
Retractable oscillating sootblower PS-P/RS-P
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
17
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Rake Sootblower - for the Economiser / Air Preheater / Gas-Gas Heater and DeNOx
Functional principle
� The blowing rake is equipped with high performance nozzles – blowing element remains in the flue-gas path
� During the blowing process the blowing rake continues to move axially into the flue-gas pass
� On reaching the end of travel position, the direction of movement changes and the blowing rake returns to its rest position
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
19
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
Rotating Element Sootblower
Functional principle
� The blowing tube is equipped with nozzles over the whole length and rotates within the flue-gas path
� During the blowing process the blowing tube performs a prescribed number of rotations
� The blowing process ends when the necessary number of rotations has been performed
� Blowing tube remains and is supported in flue-gas path
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
21
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
On-load Cleaning Systems
SMART Jet Blower
Functional principle
� Cleaning is carried out by axial movement of the lance tube in steps, while the heater basket rotates
� The SMART Jet is typically deployed below the heater with the media jets cleaning upwards, but can also be fitted above the heater as a pair
� The use of inverters and encoders allow the step-wise travel and positioning of the lance and nozzles to be infinitely controlled
� Choice of online cleaning modes air/steam, LP and HP water
� HP water jetting up to 300 bar(g) for online cleaning basket blockages
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
23
On-load Cleaning Systems
Economiser� Part Retractable
Sootblowers� Rake Sootblowers� Rotating Element
Sootblowers
� RetractableSootblowers
� OscillatingSootblowers
� Axial Sootblowers� Jet Blower� Part Retractable
Sootblowers� SMART RSG /
SMART Helix Water
Superheater/Re-Heater
Furnace� Wall Blower� Water Cannon
Air heater/Gas heater� Rake Sootblowers� Jet Blower
� Rake Sootblowers
DeNOx
Optimisation & Automation
� SMART CLEAN� SMART CONTROL
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
Content
� Steam sootblower solution
� Different types of steam sootblowers
� Functional aspects
� Deposit removal
� Selection of sootblowers
� Important design aspects
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
254 - On-Load Boiler Cleaning with Steam
Sootblower
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
264 - On-Load Boiler Cleaning with Steam
Retractable sootblower
� Travel: 0,3m - 20m over single or double rack (heavy-duty)
� Blower valve: Cast steel with adjustable throttle disc for varied blowing pressure
� Feed tube:
� Stainless steel; Ø60 mm or Ø70 mm
� Lance tube:
� Creep resistant or high alloy steels
� O.D. Ø88,9 mm, Ø101,6 mm and Ø114,3 mm
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
274 - On-Load Boiler Cleaning with Steam
Retractable sootblowers (PS series)
Valve Actuating Mechanism
Rear Suspension
Track BeamLance Tube Blower Carriage Feed Tube
Valve
Lance Tube Guidance Covering SystemElectrical Equipment
Gear MotorWall Box
Sealing & Scavenging Air Equipment
Feed Tube Support
Lance Tube Support
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
Content
� Steam sootblower solution
� Different types of steam sootblowers
� Functional aspects
� Deposit removal
� Selection of sootblowers
� Important design aspects
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
294 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
Failure due to axial crack formation
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
304 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
Failure due to surface pitting/axialcrack formation
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
314 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
Failure due to spalling
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
32
Break-up duration: 3 ms
Thin depositDistance = 9 cm
Soft deposit
Deposit break-up by steam jet
Mussmann, UoToronto 2009
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
33
Thick depositDistance = 9 cm
Soft deposit
Break-up duration: 9.50 ms
Deposit break-up by steam jet
Mussmann, UoToronto 2009
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
34
Deposit asymmetry – Actualdeposits in boilers
Flue gas
Deposit
Carry-over
Boiler tubes
4 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
35
Asymmetric
Deposit asymmetry
Deposit
Steel tube
Symmetric
4 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
36
0°
JET
90°
4 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
Deposit asymmetry
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
37
Deposit asymmetry (0º vs. 90º)
4 - On-Load Boiler Cleaning with Steam
Mussmann, UoToronto 2009
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
Content
� Steam sootblower solution
� Different types of steam sootblowers
� Functional aspects
� Deposit removal
� Selection of sootblowers
� Important design aspects
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
394 - On-Load Boiler Cleaning with Steam
Cleaning mechanism –Retractable sootblower
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
40
Sootblower Design Toolbox
Official Release 1.0
System design
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
41
Sootblower Design Toolbox
� Project specific input parameters
� Calculation of fluid flow and mechanical stability including heat transfer
� Calculation of droop correction, steam consumption and jet profile
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
42
Sootblower Design Toolbox
4 - On-Load Boiler Cleaning with Steam
Important design parameter for Steam sootblowers:
� Fuel and fuel specification
� Steam pressure & temperature (design and operation)
� Location of sootblower in boiler
� Distances and configuartion of heating elements, dimensions of elements (for cleaning)
� Fluegas temperature (max)
� Control setup and electrical configurations
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
43
Selection of blowing elements
BFB (Bubbling Fluidized Boiler) boilers
Example:
� BFB boiler burning wood waste
� Steam 25 bar(g) and 400 °C
� Superheater:
� Max. fluegas temperature 900 °C
� Retractable sootblower
� Blowing element material 13CrMo44(creep: max temp. 560 °C)
� Boiler bank:
� Max. fluegas temperature 720 °C
� Part Retractable sootblower
� Blowing element material X10CrAl13(creep: max temp. 800 °C)
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
Content
� Steam sootblower solution
� Different types of steam sootblowers
� Functional aspects
� Deposit removal
� Selection of sootblowers
� Important design aspects
4 - On-Load Boiler Cleaning with Steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
454 - On-Load Boiler Cleaning with Steam
Quality of steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
464 - On-Load Boiler Cleaning with Steam
Quality of steam
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
474 - On-Load Boiler Cleaning with Steam
�
� Piping arrangement:
� Inclination for proper draining.
� Avoid “Christmas Tree” piping layout.
� Pre-heating control:
� Draining temperature controlled, not time controlled.
� Cleaning sequence:
� Start with sootblower nearest to the drainstation.
� Short connecting pipe:
� Secure complete pre-heating; avoid“cold” pipe parts.
Recommended design principals for steamfeeding systems
© CBW Clyde Bergemann Wesel - Alle Rechte vorbehalten
48Titel der Präsentation
www.clydebergemann.com