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Ntpc dadri ppt by pc sharma

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Ntpc dadri ppt by pc sharma

  1. 1. WELCOME TO NTPC DADRI • PRESENTED BY: • P.C SHARMA • ROLL.NO-1109631034 • M.E –VIIth (B) VGI(DADRI) SUBMITTED TO: MR. G.P SAHU (ME, DEPARTMENT VGI(DADRI)
  2. 2. About NTPC • NTPC, the largest power Company in India, was setup in 1975 to accelerate power development in the country. • NTPC has installed capacity of 29,394 MW. • It has 15 coal based power stations (23,395 MW) • 7 gas based power stations (3,955 MW) • 4 power stations in Joint Ventures (1,794 MW). • The company has power generating facilities in all major regions of the country. • It plans to be a 75,000 MW company by 2017.
  3. 3. NTPC DADRI COAL BASED GAS BASED SOLAR BASED 1820 MW 830 MW 5 MW TOTAL = 2655 MW
  4. 4. Coal to Electricity ….. Basics Coal Chemical Energy Super Heated Steam Pollutants Thermal Energy Turbine Torque Heat Loss In Condenser Kinetic Energy Electrical Energy Alternating current in Stator Mech. Energy ASH Loss Heat Loss Elet. Energy Loss
  5. 5. WORKING OF STEAM POWER PLANT • Coal is burnt in a boiler ,which converts water into steam. • The steam is expanded in a turbine used to drive alternator,which converts mechanical energy of the turbine into electrical energy. • The steam expanded is condensed in a condenser to be feed into the boiler again.
  6. 6. PROCESS CYCLE(RANKINE)
  7. 7. The most important constituents of a steam power station are: a. Steam generating equipment b. Condenser c. Prime mover(i.e turbine) d. Cooling towers e. Electrical equipment Steam generating equipment includes: • Boiler • Superheater • Economiser • Air Pre-heater
  8. 8. Boiler A boiler is closed vessel in which water is converted into steam by utilising the heat of coal combustion. Steam boilers are broadly classified into following two types: (a) Water tube boilers (b) Fire tube boilers In a water tube boiler, water flows through the tubes and the hot gases of combustion flow over these tubes. Water-tube boilers are used for high-pressure boilers
  9. 9. Super heater • A device which removes last traces of moisture. • It helps in reduction in requirement of steam quantity. • steam being dry reduces the mechanical resistance of turbine. • No corrosion at the turbine blades.
  10. 10. Economiser and Air Pre-heater • They are such devices which recover the heat from the flue gases on their way to chimney and raise the temperature of feed water. • Economiser raises boiler efficiency. • Air Pre-heaters recover the heat from the flue gases leaving the economiser and heat the incoming air required for combustion
  11. 11. Condenser • Which condenses the steam at the exhaust of turbine. • It creates a very low pressure at the exhaust of turbine, this helps in converting heat energy of steam into mechanical energy in the prime mover. • The condensed steam can be used as feed water to the boiler.
  12. 12. Prime Mover (i.e. Turbine) A steam turbine is a mechanical device that extracts thermal energy from pressurized steam, and converts it into mechanical energy. About 86% of all electric generation in the world is by use of steam turbines. It has almost completely replaced the reciprocating piston steam engine. BOILER GENERATOR STEAM TURBINE
  13. 13. Cooling Towers • Remove heat from the water discharged from the condenser so that the water can be discharged to the river or re circulated and reused. • Air can be circulated in the cooling towers through natural draft and mechanical draft.
  14. 14. Coal Handling Plant Details • Source of coal = Piparwar Mines North Karanpur (Jharkhand) • Location = Near Ranchi • Distance = 1200 Kms. • Type of coal = F-grade (Washed) • E grade (Raw) • Coal requirement = 13,000 MT/Day • ( 04 rakes )
  15. 15. Ash Handling Technique • A natural result from the burning of fossil fuels, particularly coal, is the emission of flyash. Ash is mineral matter present in the fuel. For a pulverized coal unit, 60- 80% of ash leaves with the flue gas. • Two emission control devices for flyash are the fabric filters and electrostatic precipitators. • Electrostatic precipitators have collection efficiency of 99%, but do not work well for flyash with a high electrical resistivity (as commonly results from combustion of low-sulfur coal). In addition, the designer must avoid allowing unburned gas to enter the electrostatic precipitator since the gas could be ignited.
  16. 16. Top View of ESP Schematic Diagram Side view of ESP Schematic Diagram • The fluegas laden with flyash is sent through pipes having negatively charged plates which give the particles a negative charge. The particles are then routed past positively charged plates, or grounded plates, which attract the now negatively-charged ash particles. • The particles stick to the positive plates until they are collected. The air that leaves the plates is then clean from harmful pollutants.
  17. 17. Coal Ash can be used in: • Construction of embankments and fills • Construction of road in sub-base • Manufacture of cement • Manufacture of bricks/blocks • Filling as flowable fill material • Agriculture as soil amendment/source of essential plant nutrients
  18. 18. `
  19. 19. INPUTS FOR GAS STATION • Fuel –Natural gas (Primary) HSD (Alternate fuel) • Source of gas- APM, PMT:ONGC/RIL/BRITISH GAS RLNG :GAIL, IOCL, GSPCL. KG-D6 : RIL TRANSPORTATION:From GAIL through HBJ Pipeline. . Source of HSD : IOCL, HPCL, BPCL through Rly. rakes.
  20. 20. COMBINED CYCLE OPERATION (ONE MODULE) LPD WHRB GT1 BP DUCT HPD LPD WHRB GT2 BP DUCT HPD ST1 LP STEAM (5 KSC, 210°C) HP LP CW Gas Turbine Unit-1 Gas Turbine Unit-2 Steam Turbine Unit-1 HP STEAM (61 BAR, 530°C) Condenser CEP To Dearator
  21. 21. SOLAR PSLOALNATR PLANT Total capacity 5 MW
  22. 22. The total project capital cost is put at Rs. 48.59 crore.Wipro limited has designed the project over 27 acres of land within the premises of existing NTPC Dadri plant.

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