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Industrial Visit to Neyveli Lignite Corporation, Barsinghsar

Nov 18, 2017

RNBGU organized an Industrial visit to Neyveli Lignite Corporation, Barsinghsar, Bikaner for Science and Engineering students in which students learned about working of the entire 250 x 2 Mega Watt power generation plant.
 
In NLC, the engineers gave a detailed explanation about the site and the on-going process in the plant. The installed plant capacity is 2,740 MW. The plant receives the coal from Mines 1 and Mines 2 in Neyveli. The coal used is lignite which has more amount of ash content. The coal is transported through belt conveyor before getting it to the boilers. Students had a look at the pre heating process and the types of fans used for the cooling process. The plant engineers also explained about ash handling and ash filtration processes. The exhaust gases and the fly ash are passed through a chimney constructed at a standard height of about 275 m. The super heated steam (540°C) is sent to the turbine of 3 types: high pressure turbine, medium pressure turbine and low pressure turbine. Turbo alternator is present on the same shaft where turbine is present. Turbo alternator runs at a rated speed of 3000 rpm. The overall process is monitored and controlled by PLC programs. The Indigenous Hoist Winch Gear box and brake frames are used in the machines for the first time in the history of NLC. The imported critical components include the bucket wheel gear box, main slew gear box and discharge boom slew gearbox, main slew and discharge slew bearing.
 
The students were given an overview staring from the lignite mining to pulverization and its screening. They got an idea of working of boilers for the generation of steam and its maintenance by physical and chemical means and finally the use of superheated steam which drives an electric generator. They got an opportunity to view the control unit from where the working of whole power station is managed.

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