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

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Alstom Power – October 2011

ABABABABCCCCDDDDBiomasse Italia - Crotone

Electrostatic

Precipitator

End product silo

Bicarbonate injection