FLOW-prO™ vane WheeL

Alstom has developed its
patented FLOW-PRO Vane
Wheel application for RP,
RPS, and RS pulverizers.
It has been designed to
manage the critical air and
coal mixing occurring around
the outer diameter of the
bowl by reducing velocities
and minimizing recirculation
within the pulverizer body
in order to provide increased
equipment service life.
Customer Benefits
Lower velocities for reduced
downstream wear
Reduced localized wear
Increased pulverizer availability
Reduced maintenance costs
Alstom has combined years of
coal pulverization experience with
state-of-the-art computational
fluid dynamics (CFD) technology
to develop this FLOW-PRO Vane
Wheel bringing improved pulverizer
performance to customers.
TECHNICAL PRODUCT DATA SHEET
FLOW-prO vane WheeL
Upgrades
FLOW-PRO Vane Wheel segments attached to bowl
The FLOW-PRO Vane Wheel
improves upon previous Alstom vane
wheel technology while retaining the
time-proven flow patterns through
the pulverizer, but does so with
reduced wear and greater simplicity.
Significantly reduced wear is
achieved by lowering the position
of the deflector liners from the zone
where the coal has been entrained
by the airflow to the elevation where
the air meets the coal.
PSE/BPROS/PIB390-07/eng/PSER1/07.07/US/6291 © ALSTOM 2010. Alstom, the Alstom logo and any alternative version thereof
are trademarks and service marks of Alstom. The other names mentioned, registered or not, are the property of their respective
companies. The technical and other data contained in this document is provided for information only. Neither Alstom, its officers and
employees accept responsibility for or should be taken as making any representation or warranty (whether express or implied) as to
the accuracy or completeness of such data or the achievement of any projected performance criteria where these are indicated. Alstom
reserves the right to revise or change this data at any time without further notice.
The lower position of the deflector
liners redirects the primary airflow,
while it is still ‘clean’, and redirects
it inward over the bowl rim where
it entrains the coal. The coal is
then rolled immediately back over
the bowl rim and decelerated,
allowing the large particles to
drop back to the grinding zone
for further pulverization.
POWER

The remaining smaller coal
particles are directed up through the
separator body at a relatively low
velocity, resulting in reduced wear,
enhanced drying, and improved
classifier efficiency.
Theory behind FLOW-PRO Force and
Velocity Analysis
The FLOW-PRO Vane Wheel
incorporates a resized deflector along
with high-grade liner materials for
the deflector, vanes and wing tips.
The CFD and the force and velocity
analysis illustrate that the FLOW-
PRO Vane Wheel provides more
uniform flow velocities that results in
substantially reduced localized wear.
Alstom can customize vane
segments to suit a customer’s needs
for both complete FLOW-PRO
Vane Wheels and replacement parts
for existing vane wheel assemblies.
In addition to the gains provided by
air flow management, enhanced
wear resistance is provided by:
• AR plate inner segment shroud
• Replacement vane liners made from
Triten (chrome-carbide) plate
• Wear-resistant weld overlay
Alstom’s Patented FLOW-PRO Vane Wheel
Competitor Vane Wheel*
Features
Deflector liners located in the clean
air region for reduced wear
360 degree flow path for even flow
distribution to the classifier
The flow control gap (between
the rotating and stationary
components) are located out of
the erosion zone
Wingtips retained for efficient air
velocity and spillage control
Small size and steep angle of
deflector liners virtually eliminate
any coal hide out areas
A selection of wear materials and
vane wheel attachment methods
are available
PIB 390
PSE/BPROS/PIB390-07/eng/PSER1/07.07/US/6291 © ALSTOM 2010. Alstom, the Alstom logo and any alternative version thereof
are trademarks and service marks of Alstom. The other names mentioned, registered or not, are the property of their respective
companies. The technical and other data contained in this document is provided for information only. Neither Alstom, its officers and
employees accept responsibility for or should be taken as making any representation or warranty (whether express or implied) as to
the accuracy or completeness of such data or the achievement of any projected performance criteria where these are indicated. Alstom
reserves the right to revise or change this data at any time without further notice.
Deflectorless Vane Wheel*
POWER
FLOW-prO vane Wheel
The Alstom Advantage
Alstom is a leader in the design,
manufacturing and servicing of utility
and industrial power generation
systems. While our heritage dates to the
late 1800s, our capabilities continue to
expand and point us to the future.
Alstom provides the quality and
resources of an OEM while backing
our products with comprehensive
support via a dedicated customer
service organization that delivers the
responsiveness our customers require.
100 YEARS OF EXPERIENCE
+
SOLUTION-BASED
PRODUCTS & SERVICES
+
COMMITMENT TO
CUSTOMER SERVICE
=
THE ALSTOM ADVANTAGE
ContaCt Us
Toll Free: 1.866.257.8664
Direct: 1.860.285.2100
email: windsorparts@power.alstom.com
www.power.alstom.com
* Brighter color indicates higher velocity