Power Plant Engineering

1. COAL BASED THERMAL POWER PLANT

2. ENERGY CONSUMED

3. LOCATION OF POWER PLANT

5. RANKINE CYALE

6. IMPROVISATIONS OF RANKINE CYALE
1. Reheating
• Flue gas reheating
• Live steam reheating
• Combined flue gas and live steam reheating
2. Regeneration
• Ideal
• Single Stage
• Two Stage
3. Combined Reheating and Regeneration

7. REHEATING CYCLE

8. REHEAT CYCLE

9. REGENERATION CYCLE

10. REGENERATION CYCLE

11. REGENERATION CYCLE

12. Layout of Power plant

13. 1. coal and ash circuit
2. Air and flue gas circuit
3. Feed water and steam flow circuit
4. Cooling water circuit
Four Main Circuit

14. Advantages
 Plant location
 Construction and commissioning
 Power generation
 Fuel
 Less space
 Initial cost
Disadvantages
 Fuel
 Efficiency
 Life
 Air pollution
 Transportation
 Power generation cost

15. Classification of Boilers

16.  Range: 125 atm and 510°C to 300 atm and 660 °C
 Super critical operation above 221.2 bar for steam
 Latent heat of vapourisation zero
Supercritical Boilers

17. Supercritical Boilers
1. Drum Type Boiler
2. Once through Boiler
Drum Type Boiler

18. Once-through Boiler

19. High Pressure Boilers
1. La- Mont Boiler

20. Advantages of la-mont boiler

21. 2. Benson Boiler

23. 3. Loeffler Boiler

24. 4. Velox Boiler

25. Fluidized Bed Combustion (FBC)

31. WORKING OF STEAM TURBINE
THERMAL ENERGY
KINETIC ENERGY
MECHANICAL ENERGY
STEAM TURBINE
Nozzle
Moving Blades

32. IMPULSE AND REACTION TURBINE

33. STEAM TURBINE AND BLADES

34. CONSTRUCTION OF STEAM TURBINES

35. IMPULSE TURBINE

36. VELOCITY COMPOUND IMPULSE TURBINE

37. PRESSURE COMPOUND IMPULSE TURBINE

38. VELOCITY AND PRESSURE COMPOUND REACTION
TURBINE

39. Governing of steam turbines
 Methods of governing
1. Throttle governing
2. Nozzle control governing
3. By-pass governing
4. Combination of Throttle and Nozzle governing
5. Combination of Throttle and By-pass governing

40. THROTTLE GOVERNING

41. NOZZLE CONTROL GOVERNING

42. BY- PASS GOVERNING

43. COAL HANDLING SYSTEM

45. COAL CLEANING EQUIPMENTS
1. Removal of dirt
2. Coal drying
3. Coal sizing
4. Sulphur removal
5. Washing
(i) Water Jigs
(ii) Concentrating table
(iii) hydro cyclone
(iv) Heavy medium

47. Coal Mixing

48. COAL HANDLING
Coal delivery
Unload
Preparation
Transfer
Outdoor storage
Covered Storage
In plant handling
Weighing and measuring
Furnace

49. Coal Transfer

50. Fluidized Bed Furnace

53. Mechanical Strokes

54. Over feed Stoker

55. Chain Grate stoker

56. Spreader stoker

57. Under feed Stoker

58. Single retort stokers

59. Multi retort stokers

60. Pulveriser
1. Ball Tube Mill

61. 2.Ball and Race Mill

62. 3.Hammer Mill

70. COOLING
TOWER
Schematic diagram of a cooling water system

71. Natural draft cooling tower

72. Forced Draft Cooling Tower Induced draft Cooling Towers

73. Dry cooling tower

76. Bottom Ash Conveyor
Fly ash hydraulic vacuum Conveyor

77. FEED WATER TREATMENT

79. Boiler Feed water treatment system

80. DEMINERALIZATION PLANT

81. REVERSE OSMOSIS PLANT

82. BINARY VAPOUR CYCLE

83. COGENERATION SYSTEMS