BOILERS AUXILIARY PLANT RANIPET

                      

                     1.3 BOILERS AUXILIARY PLANT RANIPET

Boiler Auxiliaries Plant (BAP), the 13th manufacturing unit of BHEL was set up at Ranipet in 1980 as a part of the 4000 MW expansion of the High Pressure Boiler Plant, Trichy. BAP at Ranipet was set up as a spin-off plant for the manufacture of boiler auxiliaries viz. Electrostatic Precipitators (ESP), Air Pre-Heaters (APH) and Fans.

Over the years, the following products are also added to BAP's portfolio: Steel Chimneys, Gates and Dampers, RO based Desalination (for Industrial and Potable application), Flue Gas Conditioning Systems (FGC), Flue Gas Desulphurization Systems (FGD), Wind Electric Generators (WEG) and Missile Launchers for Defence.

The Company has been a fore runner in creating history with its State-of-the-art Design facilities, Research and development capabilities, modernized manufacturing facilities with sophisticated Metrology laboratory and NDT facilities to meet the growing demand for Quality power.

The Company has an extensive outsourcing facility which makes it possible to grow consistently over the years. The Company nourishes 400 ancillary small-scale units by off-loading structural fabrication and machining jobs through annual rate contracts.

The Company is also an ISO 9001:2000, ISO 14001, ISO 27001 and OHSAS 18001 company, and has the unique distinction of becoming the first unit of its whole corporation to upgrade to ISO 9001:2008 Quality Management System.

1.4 THERMAL POWER PLANT:

Main parts of the plant are:

o   Coal conveyor

o   Stoker

o   Pulverizer

o   Boiler

o   Coal ash

o   Air preheater

o   Electrostatic precipitator

o   Smoke stack

o   Turbine

o   Condenser

o   Transformers

o   Cooling towers

o   Generator

o   High - voltage power lines

1.4.1Coal conveyor :

This is a belt type of arrangement. With this coal is transported from coal storage place in power plant to the place  near by  boiler.

1.4.2 Stoker :

The coal which is brought near by boiler has to put in boiler furnace for combustion. This stoker is a mechanical device for feeding coal to a furnace.

1.4.3 Pulverizer :

The coal is put in the boiler after pulverization. For this pulverizer is used. A pulverizer is a device for grinding coal for combustion in a furnace in a power plant.

Types of  Pulverizer’s

·        Ball and Tube Mill

·        Ring and Ball

1.4.4 Boiler :

Now that pulverized coal is put in boiler furnace. Boiler is an enclosed vessel in which water is heated and circulated until the water is turned in to steam at the required pressure.

Coal is burned inside the combustion chamber of boiler. The products of combustion are nothing but gases. These gases which are at high temperature vaporize the water inside the boiler to steam. Some times this steam is further heated in a superheater as higher the steam pressure and temperature the greater efficiency the engine will have in converting the heat in steam in to mechanical work. This steam at high pressure and temperature is used directly as a heating medium, or as the working fluid in a prime mover to convert thermal energy to mechanical work, which in turn may be converted to electrical energy. Although other fluids are sometimes used for these purposes, water is by far the most common because of its economy and suitable thermodynamic characteristics.