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POWER SERVICE

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1

Alstom Power Inc. (Alstom) is recognized

around the world as a leader in the design,

manufacturing and servicing of power

generation equipment. While our heritage

dates to the late 1800s, our capabilitiescontinue to expand and point us to the future.

At Alstom, we combine our capabilities and

experience to enhance the productivity and

performance of your boilers, pulverizers,

feeders, air pollution control systems, ash

handling systems and auxiliary equipment.

We are an organization that focuses oncustomer service and understand the

challenges faced by plant owners, operators,

maintenance personnel and management.

Whether it is a replacement part, a rebuilt

assembly, a custom fabrication or inventory

management program, Alstom provides value

and service to the customer.

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Table of Contents

Introduction to the ATRITA Mill ................................................................................................3

ATRITA Mill Capacities ................................................................................................................4

The Alstom Advantage ................................................................................................................5

Technical Services ......................................................................................................................6

Inventory Management Programs..............................................................................................8

Outage Kits ................................................................................................................................9

Alstom Service and Distribution Centers ..................................................................................10

Rebuild/Repair Services ............................................................................................................11

R3 Component Rotation Programs ............................................................................................11

ATRITA Rebuild and Repair Services ..........................................................................................12

Complete Rotor Assemblies and Rebuilds ................................................................................12

Performance and Availability Upgrades for ATRITA Mills ........................................................13

Robotic Double Weld Overlay Hammers ................................................................................13

CT4 White Iron Alloy Castings ..................................................................................................14

Star-Tip Tungsten Carbide Products ......................................................................................15

Ship Lapped First Effect Wear Plates ......................................................................................16

Vacuum Bonded Ceramic Lined Fan Blades ............................................................................17

Vacuum Bonded Ceramic Lined Fan Housing Side Liners ........................................................18

Reaction Bonded Silicon Carbide Periphery Fan Liners ............................................................19

Bolt Head Protectors ................................................................................................................20

Replacement Parts for ATRITA Mills ..........................................................................................21

Hammer, Peg and Clip Quantities ..........................................................................................22

Crusher Section Parts List ........................................................................................................23

Grinding Section Parts List........................................................................................................25

Fan Section Parts List ..............................................................................................................27

Rotor Assembly Section Parts List ............................................................................................29

Asset Planning and Life Cycle Worksheet ................................................................................31

Rotor Assembly Rebuild Customer Information Sheet..............................................................33

Notes Page ..................................................................................................................................34

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3

ATRITA pulverizers are manufactured by

Riley Power Inc. They are high-speed mills

that operate from 900 rpm for the larger

machines to 1800 rpm for the smallest

machines. They are designed to pulverize awide range of fuels such as bituminous,

sub-bituminous, lignite, coke, and some

industrial by-products.

There are two standard ATRITA pulverizer

arrangements. A single type consists of a

crusher, a pulverizer, an internally

adjustable classifier and a fan section. A

duplex mill combines two single ATRITA

mills to form a duplex machine. Thecapacity ratings for the duplex are double

those of a single ATRITA mill of the same

size. ATRITA capacity ranges from 7000

lb/hr for a 350 single mill to 70,000 lb/hr

for the 558 Duplex mill. Duplex ATRITA

pulverizers began with the 550 single and

larger mills. Smaller sized pulverizers were

not designed as duplex mills.

The majority of the existing ATRITApulverizers consist of three sections:

1) crusher section

2) grinding section

3) classifier and fan section

Each is mounted on the same

horizontal shaft.

Each section is designed for a specific task

during the pulverization process. All sizes

feature the same pulverizer component

sections that perform the same function,

just varying in size and throughput. TheATRITA mill is driven with a single motor

that is coupled to the shaft either with

a direct drive high torque motor or

through a clutch. For most units, this is

a centrifugal style clutch that allows for

a slower start up.

ATRITA mills provide the advantage of

having a complete pulverizer mounted on

one shaft all driven by a single motor.While the frequency of required

maintenance is greater than other

pulverizer designs, the overall out of service

time is less and doesnt require specialized

tooling or rigging. For some ATRITA sizes,

many of the wear parts are

interchangeable. Utility boilers were

often supplied with a spare mill to

maintain boiler output during a mill outage.

ATRITA mills have a relatively small

rotating mass that enables shorter start

up times. They can also be brought on line

and removed from service quickly because

of the no coal reservoir design. Overall,

the simple design and operational logic

make the ATRITA pulverizer easy to operate

and maintain.

Introduction to the ATRITA Mill

Introduction

totheATRITA

Mill

ATRITA is a registered trademark of Riley Power Inc.

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COAL AIRFLOW AIRFLOWFAN FAN CAPACITY CAPACITY CAPACITY

MILL SETTINGS SIZE (LB/HR) (A/F 1.1) (A/F 1/3)550S A 63 12900 14190 16770

B 70 14500 15950 18850C 77 16000 17600 20800

550S-E E 84 16000 17600 20800550D A 63 25800 28380 33540

B 70 29000 31900 37700C 77 32000 35200 41600550D-E E 84 32000 35200 41600552S A 63 13270 17250 19900

B 70 17200 18920 22360C 77 19000 20900 24700

554D A 70 44000 48400 57200B 77 44000 48400 57200

C,F 84 44000 48400 57200556S A 70 27000 29700 35100

B 77 27000 29700 35100C,F 84 27000 29700 35100

556D A 70 54000 59400 70200B 77 54000 59400 70200

C,F 84 54000 59400 70200558S A 70 30000 33000 39000

B 77 30000 33000 39000C,F 84 30000 33000 39000

558D A 70 60000 66000 78000B 77 60000 66000 78000

C,F 84 60000 66000 78000

A=MINIMUM FAN BLADE SETTING / B= MIDDLE FAN BLADE SETTINGC=MAXIMUM FAN BLADE SETTING / F=FORWARD CURVE FAN BLADE

ATRITA Mill Capacities

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5

TheAlstom

Advantage

100 Years of Experience+

Solution-based Products & Services+

Commitment to Customer Service=

The Alstom Advantage

Alstom provides reliable delivery of products

and services to meet the demands of the

power industry. We are a dedicated customer

service organization that delivers the

responsiveness our customers require.

Alstom provides the quality and resources

of an OEM while backing our productswith comprehensive support. Our products

are designed to help our customers meet

the performance, availabilityand

reliabilityrequirements for their power

plant equipment.

Markets Served

Our experience and customer base include:

utility companies

regional electric cooperatives

federal, municipal power producers independent power producers

pulp and paper companies

industrials such as chemical plants,

steel mills and ref