Atrita Pulverizer Products and Services

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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