17-04-2014, 04:41 PM
BHARAT HEAVY ELECTRICALS LIMITED
BHARAT HEAVY.pdf (Size: 1.3 MB / Downloads: 708)
A GLIMPSE OF BHEL
Bharat Heavy Electricals Limited (BHEL) is today the largest engineering and
manufacturing enterprise of its kind in India. BHEL has a wide range of products
of Thermal, Hydro and Nuclear power stations, Transmission, Transportation, Oil &
Gas and Non-Conventional Energy.
Ranked among the top 12 manufacturers of power generating equipment in the
world, BHEL has spread its operations over a vast network of 14 manufacturing
units, with ISO 9001 certification of BVQI, besides a number of service divisions
across the country, each striving for excellence in products, performance and
service.
To meet stakeholders’ expectations, BHEL lays great emphasis on the
continuous up gradation of products and related technologies and development of
new products so as to remain competitive & future ready. The company has
upgraded its products to contemporary levels through continuous in—house
efforts as well as through acquisition of new technologies from leading
engineering organizations of the world.
FEATURES
BHEL manufactures a complete range of Bowl Mill (Pulveriser) for all supercritical
& non supercritical thermal power plant applications. Pulverisers are one of the
major auxiliaries in a coal fired thermal power station . They are used for grinding
the raw coal, so that the pulverised product at desired fineness can fed to and
directly fired in the furnace of the steam generator. Currently, BHEL has entered
into a License & Technical Assistance Agreement with M/s Alstom – France for the
supply of HP pulverisers being applied in superctiritical applications in India .
Bowl Mill has long been recognized as the most advantageous design of the coal
pulverisers and include low initial cost, low maintenance cost, removal of tramp
iron, low power consumption, easy maintenance, wide range output, quiet
operation.
PRINCIPLE OF OPERATION
Raw coal coming from feeder gets ground between the grinding rolls and bull ring
segments installed on the revolving Bowl. Bowl is made to rotate at medium speed
for proper pulverization of coal. Springs exert necessary pressure on rolls for
grinding. Hot air through the mill besides removing coal moisture, picks up the
lighter particles and takes them through the classifier and drop down the higher
size particles for further grinding. Fine coal air mixture leaves the mill and enters
the fuel piping system. Tramp iron pieces which are not required to grind, leave
the Bowl due to centrifugal force and are removed through the reject removal
system.