RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LIMITED CHHABRA DISTT. BARAN (RAJ. )

Summer Training At Thermal Power Plant

Presented By:-Gaurav raj sharma Electrical & Electronics EngineeringFinal Yr.0706421039

History

The history of power developemnt in Rajasthan goes back to the year 1949. At that time,electric power,was confined to very few towns,and electricity was considered a luxury.

The total number of towns and villages electrified at that time,did not exceed 42 and the installed gererating capacity was only 13.27 MW. When Rajasthan State Electricity Board established on 1st july 1957, power sector in Rajasthan received priority and power projects began to mushroom all over State.

Government of Rajasthan constituted the Rajasthan Rajya Vidyut Utpadan Nigam Ltd. (RVUN) under Companies Act-1956 on 19th July, 2000. The Nigam is since playing lead role in giving highest priority to the power generation for manifold and rapid development of the state.

Plant Diagram

Principle Of steam power plant

The working principle of a steam plant is based upon the Rankine cycle. Generally steam is taken as the working medium due to its ability to be stable and that its readily stable.

The flow of steam in the plant can be very easily be understood by the flow diagram of the plant. A graph plotted between the temperature and the entropy would indicate the technical details of the working by the rankine cycle. The entropy of a system can be understood as an index of degradation of energy.

 

Flow Diagram Of plant

Different Parts Of Thermal Power Plant• Coal Handling Plant Wagon Trippler Conveyor Belt Mill Area

• Boiler

• TG Building

• Generating Transformer

• Switch Yard

• ESP Area

• Cooling Tower

• Chimney

Wagon Trippler

Wagon trippler is used for Unloading Coal from open top wagons in these thermal power plants.

This image shows a wagon trippler. Here unloading of coal occurs.

A conveyor belt (or belt conveyor) consists of two or more pulleys, with a continuous loop of material.

This belt is used in these plant to get the coal to the mill area. It receives coal from wagon trippler and coal moves over the belt reaches to the destinations.

Conveyor Belt

Mill Area

A pulverizer is a mechanical device used in mill area for the grinding the coal for combustion in the steam-generating furnaces of these power plants.

There mainly two types of mill:-

Ball millsA ball mill is a pulverizer that consists of a horizontal rotating cylinder containing a charge of tumbling or cascading steel balls, pebbles, or rods.In this mill crushing of large coal occurs where coal converted into small pieces.

Bowl mill It uses tires to crush coal. There are two types, a deep bowl mill, and a shallow bowl mill.In this mill grinding of crushed coal occurs.

Boiler

A boiler is a closed vessel in which water or other fluids is heated. The heated or vaporized fluid exits the boiler for use in various processes or heating applications.

TG BuildingTG building stands for Turbine Generator building where these equipments are situated.

In this building turbine is connected to generator then exciter follows it after it bud duct receives the generated power.

Generating TransformerThis transformer is main transformer which is responsible for the

supply of generated electricity to the switch yard through RYB phases.

This transformer maintains the generated supply .

Generating transformer->

Switch Yard

A switchyard is essentially a hub for electrical power sources. For instance, a switchyard will exist at a generating station to coordinate the exchange of power between the generators and the transmission lines in the area.

A switchyard will also exist when high voltage lines need to be converted to lower voltage for distribution to consumers. Therefore a switchyard will contain; current carrying conductors, grounding wires and switches, transformers, disconnects, remotely controlled arc snuffing breakers, metering devices, etc.

ESP AreaESP stands for Electristatic Precipitator.

An electrostatic precipitator (ESP), or electrostatic air cleaner is a device that removes particles from flowing smoke after its combustion using the force of an induced electrostatic charge.

Electrostatic precipitators are highly efficient filtration devices which minimize the impurities in the combustion can easily remove fine particulate matter such as dust and smoke from the air stream.

<- ESP

Cooling TowerCooling towers are heat removal devices used to transfer process waste heat to the atmosphere. Cooling towers may use the evaporation of water to remove process heat.

•Wet cooling towers or simply cooling towers operate on the principle of evaporation. The working fluid and the evaporated fluid (usually H2O) are one and the same.•Dry coolers operate by heat transfers through a surface that separates the working fluid from ambient air, such as in a heat exchanger, utilizing convective heat transfer. They do not use evaporation.•Fluid coolers are hybrids that pass the working fluid through a tube bundle, upon which clean water is sprayed and a fan-induced draft applied.

<- Fluid coolers

ChimneyA chimney is a structure for passing hot flue gases or smoke from a boiler, furnace or fireplace to the outside atmosphere.

Chimneys are typically vertical, or as near as possible to vertical, to ensure that the gases flow smoothly.

The space inside a chimney is called a flue.

Capacity Of Plant

The current capacity of this power plant is 500MW.

But in future it will increases 2250MW.

Presently there are 2 units of 250MW. And 2 unit if 250MW is underconstruction.