BHEL PRESENCE IN COAL MILLING EQUIPMENT

Bowl mills suitable for catering to coal throughput from 10

TPH to 120 TPH.

BHEL provides Bowl Mill with

Static or Dynamic classifier as per requirement.

Spring or Hydraulic loading.

Planetary or Worm Gear

Pulverisers are one of the major auxiliaries in a coal fired thermal power station. They are

used for grinding the pre-crushed raw coal, so that the pulverised product at desired PF

fineness can be fed directly to the furnace of the steam generator.

BHEL MANUFACTURE BOWL MILLS AND BALL TUBE MILLS

15 65 115

BBD 3448

BBD 4760

BBD 4772

Tube Mill Size Vs Capacity in TPH

Mill Bowl Size Vs Capacity in Tonnes per hour (TPH) Ball Tube Mill is basically horizontal

cylindrical tube rotating at low speed on

its axis, whose length is slightly more to its

diameter. The inside of the Cylinder shell

is fitted with heavy cast liners and is filled

with cast or forged balls for grinding, to

approximately 1/3 of the diameter.

Advantages of Ball tube mills include

high availability, low maintenance,

constant capacity and fineness, hard

and abrasive fuels ground efficiently,

large reserve capacity, increased

fineness at low loads, fast response of

over range, low air-to-coal ratio, ability to

pulverise a wide range of coals, virtually

unaffected by foreign material and the

flexibility of available capacity.

Tube mills suitable for catering to coal

throughput from 30 TPH to 110 TPH.

Bowl Mill is basically a vertical Mill

rotating at Moderate speed (30 to 60

rpm) about its axis. It is recognized as the

most advantageous design of the coal

pulveriser because of its low initial cost,

low maintenance cost, removal of tramp

iron, low power consumption, easy

maintenance, wide range output & quiet

operation.

We also supply PULVERISERS suitable for

grinding Pet Coke / Lime Stone.

STATE OF ART FACILITY

BHEL Hyderabad designs and manufactures Planetary and Worm Gear Boxes for

Coal Mills. With the commercially available software’s like KISS-SOFT, UNIGRAPHICS,

HYPER-MESH and ANSYS, we model and optimise the Gear Box according to Mill and

customer requirement.

GEAR BOXES FOR BOWL MILLS

PLANETARY GEAR BOX:

Epi-cyclic or planetary gearbox is lighter,

compact, efficient and stronger than other

Gearboxes of same capacity.

Being more efficient makes it to consume

less power compared to other gear drives.

Exclusive Test Bed for Planetary Gear Box

Worm Gear Box Assembly (Mill base

Type)

WORM GEAR BOX:

With Worm gearbox high velocity reduction can be achieved within the same volume

compared to other drives.

The worm gear drive is provided in two variants: Mill Base type and Withdraw-able type.

With vast experience in Gear Box Technology, we provide the following services:

Replacement of Triple Reduction Gear Box of E –type Mill with Planetary Gear Box.

Conditional/Life Assessment of Old gear Boxes.

We also provide services to other types of Gear boxes given for other applications (other

than Coal Mills)

We can also provide suitable gear boxes for other applications.

View of Planetary Gear Box

Assembly

CUSTOMER SERVICE

BHEL recognises criticality of pulveriser in power plant. Our customer service Department is here

to ensure that customers receive the best service every time. Typical services are outlined

below:

For any query, Please Contact Pulveriser Engineering Department:

+91 040-23182568 or pulvengg@bhelhyd.co.in

Website: http://web.bhelhyd.co.in or www.bhel.com

SPARES

• The market for the Coal Mills Spares are jointly

catered to by BHEL Hyderabad division along

with the BHEL HERP, Varanasi and BHEL EPD,

Bangalore.

• The regional centres named as SSBGs located

in almost all the major cities in India, are single-

point contact to our valued Customers.

• In order to serve our esteemed Customers in a

better and more effective way, we are linking

our spares to corporate B2B portal.

• BHEL would also like to assist our valued

Customer(s) to identify and plan for their spares

requirement in order to maximize the

availability of the Coal Pulverisers and realize

maximum value for their money.

FIELD SUPPORT

Apart From Field support, we also offer the

following Services to Customer

Condition Assessment (CA) Studies

Performance Evaluation Test (PET)

Assistance to Customers for troubleshooting

Liaison with BHEL Trichy for Boiler R&M

Offering Supervisory Services

Annual/Capital Overhauling along with the

Power Sector-Region – Service After Sales

(SAS).

RENOVATION & MODERNIZATION

Renovation and Modernization (R&M) of the Coal

Pulverisers is taken up to achieve:

•Improvement in PF Fineness for better and

improved boiler performance (less unburnt

carbon)

•Use of better materials and up-to-date

Technology (improved availability)

•Focus on Efficient Renovation & Modernization

(more value for investment)

Team from BHEL Hyderabad (India) visit the site

and study the real Site conditions so as to

suggest/recommend measures to improve

availability and performance of the Mills.

RENOVATION & MODERNIZATION

We offer the following Packages:

Replacement of components and/or

retrofitting modified components.

Up-gradation of existing Bowl Mill to higher

size in the same family of mills.

Replacement of existing Mill with latest

version bowl mills of same/higher capacity.

Addition of one more mill for increasing

availability and PLF.

Addition of Milling Plant in presently oil/gas

fired Boilers, with provision made during

initial design stage.