Advantages and Dis-advantages of Fluidized Bed Combustion
FBC is being used exhaustively these days in all major power stations all over the globe, owing to numerous advantages that it offers over the other pre-dominant methods of combustion. Few of those are :- 1) High thermal efficiency. 2) Easy ash removal system, to be transferred for made cement . 3) Short commissioning and erection period. 4) Fully automated and thus ensures safe operation, even at extreme temperatures. 5) Efficient operation at temperatures down to 150° C ( i.e. well below the ash fusion temperature). 6) Reduced coal crushing etc.(pulverised coal is not a necessity here). 7) The system can respond rapidly to changes in load demand, due to quick establishment of thermal equilibrium between air and fuel particles in the bed. 8) The operation of fluidized bed furnace at lower temperature helps in reducing air pollution. The low temperature operation also reduces the formation of nitrogen oxides. By adding either dolomite (a calcium-magnesium carbonate) or lime stone (calcium carbonate) to the furnace the discharge of sulphur oxides to the atmosphere can also be reduced if desired.