O slideshow foi denunciado.
Seu SlideShare está sendo baixado. ×

Best ppt on thermal power station working

Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Anúncio
Carregando em…3
×

Confira estes a seguir

1 de 49 Anúncio

Mais Conteúdo rRelacionado

Diapositivos para si (20)

Quem viu também gostou (20)

Anúncio

Semelhante a Best ppt on thermal power station working (20)

Mais recentes (20)

Anúncio

Best ppt on thermal power station working

  1. 1. Welcome to presentation on Thermal Power Generation
  2. 2. Layout of a Pulverized Fuel Power Plant
  3. 3. What is Thermal Power ? Electricity Generation using heat value of Fuel June 29, 2013 4 and naturally available energy in to electrical energy. In thermal power plant, Water is the working fluid. The source of energy is C
  4. 4. Energy Conversion All power plants convert some form of easily and naturally available energy in to electrical energy. In thermal power plant, Water is the working fluid. The source of energy is Chemical Energy of fuel. Sequence of energy conversion is: June 29, 2013 Fig. Energy conversion taking place in the thermal power plant)5
  5. 5. Working Principle Rankine Cycle
  6. 6. Law of Conservation of Energy • Chemical Energy of Fuel • Heat Energy in Furnace • Heat Energy of Medium Water(H.P. Steam) • Kinetic Energy of Turbine Rotor • Electromotive force & • Electricity Generation
  7. 7. June 29, 2013 PMI Revision 00 8 Chemical Energy is converted to Heat Energy by combustion Of fuel in Boiler. Heat energy converts water to high pressure, high temperature steam. (in Boiler) In Turbine, steam expands as it is passed through number of nozzles. Heat energy is thus converted to kinetic energy. Steam is admitted to Turbine through pipes. Steam is then passed over blades, arranged on shaft of Turbine. Shaft rotates & Kinetic energy is thus converted to mechanical work Steam exhausted from turbine condenses in Condenser, rejecting unavailable heat energy. Pump delivers condensed water from Condenser back to Boiler. Generator is coupled to Turbine, where mechanical energy is converted to electrical energy.
  8. 8. Main Inputs Water : Medium Coal : Fuel June 29, 2013 PMI Revision 00 9
  9. 9. WHY COAL as Fuel Coal can provide usable energy at a cost of between 12 to 15 % compared to oil and natural gas, and coal prices are relatively stable. Coal is inherently higher-polluting and more carbon-intensive than other energy alternatives. However, coal is so inexpensive that one can spend quite a bit on pollution control, and still maintain coal’s competitive position.
  10. 10. Main Plants/Machines • CHP : To Handle Fuel Coal • WTP : To Treat Water • Boiler : Generate High Press, High Temp Steam • Turbine: As a prime mover to Generator • Generator: To Generate Electricity • Transformer : For required Voltage • Switch yard : On ward Transmission of Power
  11. 11. TYPES OF WATER REQUIRED AT TPS • DEMINERALISED WATER – BOILER • SOFTEN WATER – COOLING & GENERAL SERVICE • DRINKING WATER – DOMESTIC PURPOSE • ASH HANDLING – RAW WATER OR UNTREATED WATER • FIRE FIGHTING – UNTREATED WATER • COAL HANDLING – UNTREATED WATER • DM % 3-4 • CW/GS % 50-55 • AHP % 40-45 • DOMESTIC % 6-7
  12. 12. STRUCTURE OF BOILERS • Boiler structure is supported on 4 columns that is hung from top and supported on vertical columns • Boiler is of tangentially fired balanced draught natural circulating radiant reheat cycle dry bottom with direct pulverized coal type • All plates, rivets, bars and their testing is covered under regulation and construction is done under the supervision of inspecting officer at all the stages • Total expansion of boiler vertically downwards in heated condition is 340 mm and ideal expansion is 1.2 mm/mtr/1000 C • Seal through and bottom ash hoppers is provided
  13. 13. Boiler System This system consists of • Furnace System • Super Heater System • Re heater System • LTSH System • Economiser System • Air Heater System • PA System • SA System • I D System • Mill System
  14. 14. Pressure parts of Boiler • Waterwall • Economiser • Superheater • Reheater • Boiler drum
  15. 15. Wind box
  16. 16. CROSS SECTION OF BOILER FURNACE & FLUE GAS PATH
  17. 17. June 29, 2013 PMI Revision 00 21 DRUM Lifting in Progress
  18. 18. TURBINESTURBINES
  19. 19. Turbine System       This consists of • HP Turbine • IP Turbine • LP Turbine • Regeneration Heating System consists of 1. HP Heaters 2. LP Heaters 3. Deaerator 4. Condenser 5. CEP and BFP 6. CW System
  20. 20. TURBINE CROSS SECTIONAL VIEW
  21. 21. General DescriptionGeneral Description • There are three steam turbines in a thermal power plant, namely, high There are three steam turbines in a thermal power plant, namely, high  pressure turbine(HPT), intermediate pressure turbine(IPT) and low pressure turbine(HPT), intermediate pressure turbine(IPT) and low  pressure turbine(LPT)pressure turbine(LPT) • The high pressure turbine (HPT) comprises of 12 stages, the firstThe high pressure turbine (HPT) comprises of 12 stages, the first stage being governing stage. The steam flow in HPT being instage being governing stage. The steam flow in HPT being in reverse direction, the blades in HPT are designed for anticlockwisereverse direction, the blades in HPT are designed for anticlockwise rotation, when viewed in the direction of steam flow.rotation, when viewed in the direction of steam flow. • After passing through H.P. Turbine steam flows to boiler forAfter passing through H.P. Turbine steam flows to boiler for reheating and reheated steam comes to the Intermediate Pressurereheating and reheated steam comes to the Intermediate Pressure Turbine (IPT)Turbine (IPT)  The Intermediate Pressure Turbine has 11 stages. H.P.The Intermediate Pressure Turbine has 11 stages. H.P. & I.P. rotors are connected by rigid coupling and have a common& I.P. rotors are connected by rigid coupling and have a common bearing.bearing. • After flowing through IPT, steam enters the middle part of lowAfter flowing through IPT, steam enters the middle part of low pressure turbine (LPT) through two cross-over pipes. In L.P.pressure turbine (LPT) through two cross-over pipes. In L.P. Turbine, steam flows in the opposite paths having four stages inTurbine, steam flows in the opposite paths having four stages in each path. After leaving the L.P. Turbine the exhaust steameach path. After leaving the L.P. Turbine the exhaust steam condenses in the surface condensers welded directly to thecondenses in the surface condensers welded directly to the exhaust part of the L.P. Turbine.exhaust part of the L.P. Turbine.
  22. 22. HPT Cross section
  23. 23. Steam flow in a turbineSteam flow in a turbine • Steam  in H.P turbine :  P = 140 kg/cmSteam  in H.P turbine :  P = 140 kg/cm22                                                                                   T = 540 T = 540 oo CC • Steam in I.P :                 P= 26 kg/cmSteam in I.P :                 P= 26 kg/cm22 T = 540 T = 540 oo CC • Steam in L.P. :Steam in L.P. :  P = 7 kg/cm P = 7 kg/cm22 T = 270 T = 270 oo CC
  24. 24. Working principleWorking principle • Kinetic energy converted to rotational energy Kinetic energy converted to rotational energy  which rotates the rotor of generatorwhich rotates the rotor of generator • Blades are so designed so as not to strike Blades are so designed so as not to strike  the blades but to glide on to avoid wearingthe blades but to glide on to avoid wearing • Total motive force acting on the blades isTotal motive force acting on the blades is thus the resultant of all the centrifugalthus the resultant of all the centrifugal force plus the change of momentumforce plus the change of momentum  
  25. 25. ROTORSROTORS • HIGH PRESSUREHIGH PRESSURE • INTERMEDIATE PRESSUREINTERMEDIATE PRESSURE • LOW PRESSURELOW PRESSURE
  26. 26. GLANDSGLANDS • WATER SEALED GLANDSWATER SEALED GLANDS • CARBON RING GLANDSCARBON RING GLANDS • DIAGPHRAGM GLANDSDIAGPHRAGM GLANDS • LABYRINTH GLANDSLABYRINTH GLANDS
  27. 27. Protections & Interlocks • To save the loss to men & Machines • Smooth Operation • Requisite & Extended life • Statutory Acts
  28. 28. AOP MOP AOP Discharge header Filtered Control Oil Remote Trip Solenoid Valves Main Trip Valves Hyd. Trip Device TEST V/V STOP V/V SERVO MOTOR STOP & CONTRO L VALVE CONTROL VALVE SERVO MOTOR HydConverter Electro-Hyd Converter Startin g Device Secondary Oil TripOil Aux Start-up Oil Start-up Oil AuxTrip Oil Filtered Controlled Oil Filter BLOCK DIAGRAM OF GOVERNING SYSTEM
  29. 29. TURBINE OVERSPEED TRIP DEVICE FLY BOTL Aux Trip Oil AUX START-UP OIL TO RESET AUX TRIP OIL Drain TURBINE OVERSPEED TRIP DEVICE
  30. 30. TURBINE SHAFT AUX START-UP OIL TO RESET AUX TRIP OIL DrainTRIPPING OF Thrust Bearing TRIP DEVICE RESETTING OF Thrust Bearing TRIP DEVICETESTOIL THRUST BEARING TRIP DEVICE
  31. 31. BOILER Condenser LP TURBINE IP TURBINE HP TURBINE MS MS CRH NRV HRH HPSV HPSV IPSV IPSV GENERATOR HPCV HPCV IPCV IPCV CRH NRV TG SET
  32. 32. Generator • Faradys Law of Induced EMF
  33. 33. Generator Components • Stator • Rotor • Exciter • Stator water cooling system • Rotor & Stator Hydrogen cooling System • Hydrogen Seal oil System • Bus Ducts • Generator synchronising system

×