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Alstom Power – October 2011
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� Dedicated R&D facilities are manned by
highly-skilled teams offering:
– Applied physics / Fluid dynamics
– Chemical engineering
– Analytical laboratory
– Instruments / measuring techniques
– Laboratory for pilot plants and flow
model testing
– Experimental workshop for test
equipment and special services
Focus on providing state of the art technology
Air Quality Control SystemsOur R&D Capabilities – Växjö (Sweden)
Alstom Power – October 2011
ABABABABCCCCDDDDAlstom Power Solutions for W2E & BiomassPulse Jet Fabric Filter Gas Distribution
Alstom FF Inlet Arrangement
Optimised ratio
bag/cage
Inlet
duct
Outlet
duct
FF Service area
Gravimetric
gasflow
Outlet damper
poppet type
Inlet damper flap
type
Pressure tank with
Optipow valves
Alstom Power – October 2011
ABABABABCCCCDDDDAlstom Power Solutions for W2E & BiomassPulse Jet Fabric Filter Gas Distribution
Alstom FF Gas Distribution in Bag Nest
Gravimetric gasflow
Optimised gas/dust
distribution
Alstom Power – October 2011
ABABABABCCCCDDDDAlstom Power Solutions for W2E & BiomassPulse Jet Fabric Filter Cleaning Principle
Alstom FF Pulse Cleaning Effect
Conventional
High Pressure
5 – 7 Bar
Ejected Pulse
Secondary air 6 – 7
times the Volume
of primary air flow
• Long pulse
• Slow pulse
• Short bag length
Alstom Advanced
Low Pressure
≈ 2 – 3 Bar
Direct pulse
Primary air expands
direct Into the bag
Secondary Air 1 – 2
times the primary Air
• Fast and short pulse
• “Deep” pulse
enables longer bags
Alstom Power – October 2011
ABABABABCCCCDDDDAlstom Power Solutions for W2E & BiomassPulse Jet Fabric Filter Cleaning Equipments
Alstom EFFIC – FF Controller
Features:
• Pulse cleaning:
• Time & Diff. Pressure control
• Pulse Setting
• Time, Order & Interval Time
Basic
Equipment required: Diff. Pressure sensor
Advanced
Features:
• Filter Drag Control
• Bag Status Monitoring
• Valve Fault detection
Alstom Power – October 2011
ABABABABCCCCDDDDAlstom Power Solutions for W2E & BiomassElectroStatic Precipitators
Alstom ElectroStatic Precipitators
• Wet and Dry Electro Static Precipitators
• More than 25.000 installation over the world (since 1939)
•R & D facility in Vaxjo (Sweden)
• Easy maintenance operation
Alstom Power – October 2011
ABABABABCCCCDDDDAlstom Power Solutions for W2E & BiomassElectroStatic Precipitators
Alstom ElectroStatic Precipitators
ESP Codes
FAA Steel casing, bottom rapping
FTA Steel casing, top rapping
FPA Steel casing, top rapping discharge
electrodes
Bottom rapping collecting
electrodes
FAC Concrete casing, bottom rapping
FTC Concrete casing, top rapping
FAV Wet ESP
Electrode spacing = The distance
between two rows of collecting
electrodes.
F=250 mm J=325 mm
G=275 mm K=350 mm
H=300 mm L=375 nn
M=400 mm
F, H and M spacings are most common.
Alstom Power – October 2011
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Alstom PowerControl Systems
Conventional T/R
EPIC III Control unit for T/R\s
Ethernet/Fläktbus
HMI ProMo
EPICABControl of
T/R, rappers,heaters etc.
SIRHV energizationand control ofrappers, heaters etc
RTU
ESP
EFFIC Control unit for
Fabric Filter FF
Input signals-Vibration
-Sound
-Opacity
-Boiler load
etc..
Input signals-Pressure drop
-Opacity
etc..
Alstom Remote Assistance
Alstom Power – October 2011
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Alstom Power Electronic - SIR
AC
DC
50 kHz
CONTROL
CONTROL
AC
DCAC
HV DC
ACHV DC
F
AC
DC
Mains frequency power processing
SIR - High frequency power processing
Last Version: SIR IV 100kV/1200mA
•Switched
High frequency electronic power processing
technique.
•Integrated
Transformer, power electronics and
controller are integrated in the same
housing.
•Rectifier
AC input, DC output.
Alstom Power – October 2011
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Alstom Power Electronic - SIR
220 Kg. 200 + 1.500 Kg.
ESPVoltage
kV
ESPCurrent
mA
S
kV
0
20
40
60 80
SIRSIRConv. T/R
Conv. T/R
SIR
Spark levelPeak kV
Valley kV
( )
• Traditional
• 50 - 60 Hz
• Single phase
• 2000 kg
• 600 Litre Oil
• Peak to Trough Ripple as high as 50% of average
voltage
− RMS value reduced
• Typical 20-100 msec recovery from spark over
•High Frequency
•25 - 50 kHz
•3-phase
•250 – 500 kg
•50 Litre Oil
•Peak to Trough Ripple less than 5% of average voltage
− RMS value maximized
•Typical 2-19 msec recovery from spark over
•Controls & Cabinets built in
T/R Set Comparison
Alstom Power – October 2011
ABABABABCCCCDDDDBiomasse Italia - Strongoli
Alstom Power – October 2011
ABABABABCCCCDDDDBiomasse Italia - Crotone
Electrostatic
Precipitator
End product silo
Bicarbonate injection