SURATGARH SUPER THERMAL POWER STATION
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Suratgarh Super Thermal Power Station is owned by Rajasthan Rajya Vidhyut Utpadan Nigam Ltd. and is situated near village Raiyanwali about 25 KM from Suratgarh town, an ideal location for setting up a thermal power station in the state having regards to the availability of land, water, transmission network proximity to broad gauge railway and being an important load centre for north west Rajasthan. The techno-economic clearance for the prefect was issued by CEA in June 1991 – the planning commission accorded investment sanction for the project in Nov. 91 for a total estimated cost of Rs. 1253.31 crores on prices prevailing in Sept. 1990. The updated cost of the project is estimate at Rs. 2300 crores of including IDC.
India’s 71% power amounting to 64151MW in a total of 89167MW comes from Thermal Power Station. In general it burn fuels and use the resultant heat to raise steam which drive the turbo generator.
STPS is a coal fired power station. The other raw materials are air and water. The coal, brought to the station by trains ,travels from the coal handling plant (1) by conveyor belt to the coal bunkers, from where it is fed to the pulversing mills (2) which grind it as fine as face powder. The finely powdered coal mixed with pre-heated, air is then blown into the boiler (4) by a fan called Primary Air Fan (3) where it burns, with additional amount of air called secondary air supplied by a Forced draft Fan (3A). As the coal has been ground so finely the resultant ash is also a fine powder
Steam turbine is a rotating machine which CONVERTS HEAT ENERGY OF STEAM TO MECHANICAL ENERGY.
In India, steam turbines of different capacities, varying from 15 MW to 500 MW, are employed in the field of thermal power generation. The design, materials, auxiliary systems etc. vary widely from each other depending on the capacity and manufacturer of the sets.
The Thermal Power Plants with steam turbine uses Rankine cycle. Rankine cycle is a vapour power cycle having two basic characteristics:
1. the working fluid is a condensable vapour which is in liquid phase during part of the cycle and
2. The cycle consists of a succession of steady flow processes, with each processes carried out in a separate component specially designed for the purpose. Each constitute an open system, and all the components are connected in series so that as the fluid circulates through the power plant each fluid element passes through a cycle of mechanical and thermodynamic stages.
The turbine is of tandem compound design with separate HP, IP and LP cylinder. The HP & IP turbines are of single flow type while LP turbine is of double flow type; the turbine is condensing type with single reheat. It is basically engineered on reaction principle with throttle governing. The stages are arranged in HP, IP and LP turbines, driving alternating current full capacity Turbo generators.