21-05-2012, 12:31 PM
COAL TO ELECTRICITY
COAL TO ELECTRICITY.ppt (Size: 4.14 MB / Downloads: 65)
1.Air cycle: It consists of Air pre- heaters, ID Fans & FD Fans.
a).Two number Forced draught (FD) fan to supply combustion air to
the boiler (Total 800 T/hr.) via Air Pre-heaters &
(b).Two number Induced draught fan (ID) fan to suck product of combus-tion and discharge it through chimney
The two fans also maintain the furnace pressure to -5 to -10 mm of water column (slightly below atm. pressure) at the furnace.
Coal handling system
The plant burns coal delivered by train / Road / Rope - way. Once the coal is delivered to the plant, it is unloaded by coal handlers and either stored in a stock pile for future use or is transferred (of the required size-2.5 to 3 cm) via coal conveyors into the coalbunkers at the plant for immediate use.
Coal Feeder
Coal feeder regulates the amount of coal flow to the pulverizer.
Coal Pulverizer ( Coal Mill )
It grinds the coal to a pulverized state (200 mesh size). Pulverized coal is transported to the furnace with the help of air supplied by Primary air (PA) fan (55 T/hr. 77°c) for combustion.