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Nashik Thermal Power StationIntroduction Nashik
Thermal Power Station (NTPS) is a story of power. Power of its equipment,
power of the workers, power of everybody who has anything to do with the
running and maintenance of NTPS. It is situated near village Eklahare,
7 km from Nashik Road railway station .
The stage I comprises of 2 x 140 MW units. The first unit was synchronised on 16th August 1970 followed by the second Unit on 21st March 1971. The cost of the unit including civil work was Rs 56.5 crores each thus making the cost per installed KW Rs. 1750. The pulverised fuel boilers of the unit are front fired type from Babcock and Wilcock of France and the turbines also are from France. The Stage II of the Nashik
Thermal Power Station comprises of three units of 210 MS each of BHEL make.
The first of the 210 MW unit was synchronised on 26th April 1979 at a total
project cost of Rs. 94.73 crores. The next two units i.e. Unit No 4 and
5 of 210 MW were constructed at the cost of Rs 143.95 crores and were commissioned
on 10th July 1980 and 30th January 1981 respectively. Thus total cost of
stage II is Rs 238.68 crores, making the cost of per installed KW Rs. 4075.
The equipment for Station "B" i.e. 3 x 210 MW was supplied by BHEL. Boilers
are corner fired using pulverised fuel and incorporate American design
made by Combustion Engineering. The Turbines are of Russian design. Each
unit has an independent control room, housing all sophisticated equipment.
Coal Handling PlantThe coal requirement for such a big thermal power station is enormous. For full rated generation, Nashik required 12 to 13 thousand M.T. of coal per day. Nashik is linked for coal supplies with Western Coalfields and South Easter Coalfields. Nashik being located far away from the collieries, the freight component is considerable and is normally 80 to 100% of the cost of coal. Thus making a landed cost of Rs. 410.00 per ton (1986 prices).Oil Handling PlantOil is used as a secondary fuel for the boilers and is required for initial start up and during low load operation. Fuel oil is received in rail tankers (HSD by road tankers). The power plant has an unloading capacity of 64 rail tankers at a time. Nashik was the first power station in Maharashtra State Electricity Board (MSEB) to successfully switch over from imported F.O. to LSHS ( which is an indigenous product of Bombay High) thus achieving savings in foreign exchange.Power Distribution
Electricity produced by the generators at 15.75 kv is boosted upto 200 kv by means of step-up transformers. The power so boosted upto 200 kv is fed to the Maharashtra Grid through six nos of 220 kv and two nos of 132 kv transmission lines. Surplus power is also fed to the neighbouring Gujarat Grid via the 220 kv Navsari line. The sub-station and transmission lines being the vital links between the consumer and the power station, they are given top most priority in terms of maintenance. The lines pass through high hills, forest and along sea shore etc. and are subjected to vagaries of nature, causing stresses and making them prone to failure. The maintenance of such high voltage lines in the difficult terrain offers a really challenging job. MSEB has successfully accomplished this task through its determined staff and special T&P. River BarrageThe water requirement of the power station is met by pumping water from the river Godavari by means of four river water pumps of capacity 3050 m3 per hour, out of which normally two pumps are running, the other two being standby. For sufficient storage of water, a barrage has been constructed down stream of pump house. The barrage has rotary-type gates which operate on the principle of buoyancy. These gates are lowered during the monsoon to let out the flood water.Utilisation of waste land - first experiment in the countryThe speed at which development activities are taking place in our country is a healthy sign, for any nation as far as the prosperity is concerned.While on the job, one hardly finds any time to look back at the extensive damage and destruction of the ecology that has been created with the pace of industrialisation. Nashik TPS for a normal rated generation, produces about 3000 to 3500 m.t. of Fly ash per day i.e. 1.2 Million tonnes per year. The ash disposal area is within the range of 1 km from the power station and presently the area under ash deposit is 75 hectares. Another 75 hectares area is proposed to be acquired for dumping this fly ash for a period of another 20 years. A part of this fly ash is being used by cement and brick manufacturers. However, such demand is very meagre. The ash which is discharged in the valley is so fine that even the lighter winds in summer can lift it and carry it far away, thus creating a pollution problem. In a bid to solve this problem, an experiment was started at NTPS viz. Plantation of Trees on Ash Deposits. Initially Subabul trees were planted in the year 1982 on ash deposit which is about 12 to 13 m. high . It was fascinating to see the growth of these trees. Presently the area under plantation is about 7.5 hectares and is kept separated from main valleys which are reserved for depositing ash. The growth of these Subabul trees on ash deposit was indeed faster than those planted elsewhere in the colony. Further it was extremely heartening to see that the height of Subabul trees in the first year of plantation itself was 2 to 3 mts. and the trees were bearing fruits. The tremendous success of growing threes on ash deposits, encouraged further efforts. Additional plantation is being done every year in a phased manner. Today, there are nearly 20000 trees of various varieties on this ash deposit. NTPS takes pride in pioneering such efforts in restoring the ecological balance. Water treatment plantFor the units operating at high pressure and temperature, extremely pure water is required to prevent corrosion and scaling. Such water requirement is met by the demineralised plant (capacity 550 mt/hr).Also to cater for the need of the cooling water for condensers, oil coolers, etc. the water is supplied by the softened water plant (capacity 6000 (Mt/hr). Before admitting to the treatment plant, the river water is cleaned in the clarificulator and the gravity filters. Domestic water requirement of the power station and colony is met by the domestic pumps installed in the Water Treatment Plant (capacity 600 MT/hr.). Ensuring clean water back to riverThe Power Station Colony houses about 15000 people. The effluent water which amounts to 300 m3/Hr would cause pollution in the river Godavari if let out untreated. Hence a Sewage Treatment Plant is installed on the outskirts of the colony to treat the effluent before letting it out into the river.TPC takes pride in the fact that they meet about 25% of Maharashtra’s energy requirement. Resorts for visitorsEklahare being situated away from the City, visitors, officers and technical experts who visit the Power Station are not deprived of comforts of staying in a city. They can enjoy luxurious stay in NTPC’s guest house, which has nineteen well equipped suites out of which nine suites are air conditioned. The ‘guest house complex is a spot with beautiful landscape and a rose garden along with lawns and fountains.The welfare of staff and workersA huge residential complex has been constructed for accommodating officers and workers. The complex consists of about 2000 quarters , each quarter being an independent unit with all amenities. Further, the colony has a market complex where all daily needs can be met. The complex also comprises of school building imparting education upto 10th Std., hospital building, bank, post office etc. Two separate clubs have been constructed where officers and workers can enjoy badminton, table tennis, T.V. and all other indoor and outdoor games along with a library having a wide variety of books, magazines and newspapers.Sculpture "Powerful"The sculpture with a height of 17 meters, weighing 25 tones standing as a guard at the entrance of NTPC is the tallest metallic sculpture in the country and is totally made up of scrap material like grinding rolls, coal mill liners, ball, baffle plates, coal feeder sprockets, chains, slurry pump impellers etc. available from the power station. The speciality of this sculpture is that all the scrap material used are fitted without altering the shape or size to fabricate this sculpture .AchievementsNTPC has
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