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

Box.

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

0 20 40 60 80 100 120

62"

70"

80"

94"

100"

110"

120"

20 40 60 80 100 120

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 a 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 to

approximately 1/3 of the Shell diameter

for grinding. Advantages of Ball tube mills

include high availability, low

maintenance, constant capacity and

fineness, hard and abrasive fuels are

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

HI-CHROME LINERS FOR BALL TUBE MILLS:

The Tube Mill shell is lined with special Hi

chrome liners for protection of the shell plate.

These liners are replacement components. They

assist in grinding of the coal by optimum lifting of

the balls and forcing them to fall on raw coal

bed. Under this impact, the coal gets pulverized

due to attrition.

For above application Hi-Chrome liners

(Castings) are provided for longer life. The

metallurgy and profiles of the liners are so

designed and selected such that there is

minimum wear on the liners and proper lift is

given to the balls.

Lip Pouring Ladle facility at BHEL Hyderabad

Induction Melting Furnace facility at BHEL Hyderabad

Tube Mill liners installed at site

In case of Manganese steel liners

they need to be reversed after 50% of its

wear life whereas the High Chromium

liners are designed to eliminate the liners

reversal and to enhance the liner life to

10 to 15% and thereby increasing the mill

availability.

BHEL Hyderabad has adequate

facilities to manufacture Hi-Chrome liners

to meet market requirement.

Continuous Core Sand Mixer Facility at BHEL Hyderabad

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).

Residual Life Assessment (RLA).

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.