Power Plant Engineering

160 POWER PLANT ENGINEERING Coal is generally ground in low speed ball tube mill. It is filled to 20-35% of its volume. With ste ...

STEAM POWER PLANT 161 4.7.3 Shaft Mill Fig. 4.24 shows fuel pulverization with a shaft mill. The fuel from bunker is moved to fe ...

162 POWER PLANT ENGINEERING Hot air is passed through coal in the feeder to dry the coal. The coal is then transferred to the pu ...

STEAM POWER PLANT 163 Pulverised coal produced by it should be of satisfactory fineness over a wide range of capaci- ties. It s ...

164 POWER PLANT ENGINEERING (iii) Coal air mixture should move away from the burner at a rate equal to flame front travel in ord ...

STEAM POWER PLANT 165 Coal and Primary AirA Sec. Air Furnace Molten Slag Sec. Air Coal and Primary air Section at A.A (c) (d) (e ...

166 POWER PLANT ENGINEERING Raw Coal Bunker Conveyor Breaker Cyclone Furnace Valve Crusher Rotary Seal Feeder Primary Air Slag C ...

STEAM POWER PLANT 167 Insulating Concrete Expanded Metal Lath High Temp Plastic Insulation Magnesia Block Casing Touching tubes ...

168 POWER PLANT ENGINEERING 4.11.1 Ash Handling Equipment Mechanical means are required for the disposal of ash. The handling eq ...

STEAM POWER PLANT 169 Boilers Water Boilers Sumps Fig. 4.34. Hydraulic System. In this method water at sufficient pressure is us ...

170 POWER PLANT ENGINEERING D. P. Suction Pipe Ash Sluice Ash Sump Way S. B. N. H. P. Pump H. P. Water Piping Bra Hopper Overhea ...

STEAM POWER PLANT 171 Efficient Combustion of Coal. The factors which affect the efficient combustion of coal are as follows : ...

172 POWER PLANT ENGINEERING (iv) Type of burners used. (v) Mixing arrangement of fuel and air. The flames over the bed are due t ...

STEAM POWER PLANT 173 gases is reduced and causes heavier dust particles to fall down. Changing the direction of flow [Fig. 4.39 ...

174 POWER PLANT ENGINEERING Depending on the type of fuel and the power of bailer the ash collection in industrial boilers and t ...

STEAM POWER PLANT 175 4.13.2 FLUIDISED BED COMBUSTION (FBC) Burning of pulverised coal has some problems such as particle size o ...

176 POWER PLANT ENGINEERING (iv) The size of coal used has pronounced effect on the operation and performance of FBC sys- tem. T ...

STEAM POWER PLANT 177 2.Describe the various types of grates used with hand fired furnaces. 3.Name the various methods of ash ha ...

178 POWER PLANT ENGINEERING 20.Explain the methods used to increase thermal efficiency of a steam power plant. 21.Write short no ...

Chapter 5Chapter 5Chapter 5Chapter 5Chapter 5 Steam GeneratorSteam GeneratorSteam GeneratorSteam GeneratorSteam Generator 5.1 In ...