Furnace : A boiler furnace is that space under or adjacent to a boiler in which fuel is burned and from whichthe combustion products pass into the boiler proper. It provides a chamber in which the combustion reactioncan be isolated and confined so that the reaction remains a controlled force. In addition it provides support orenclosure for the firing equipment.Boiler Drum : The function of boiler drum is to separate the water from the steam generated in the furnacewalls and to reduce the dissolved solid contents of the steam to below the prescribed limit of 1 ppm. Thedrum is located on the upper front of boiler.Economizer : The purpose of economizer is to preheat the boiler feed water before it is introduced into thedrum by recovering heat from the flue gases leaving the boiler. The economizer is located in the boiler reargas pass below the rear horizontal super heater.Superheater : There are three stages of superheater besides the side walls and extended side walls. The firststage consists of horizontal superheater of convection mixed flow type with upper and lower banks locatedabove economizer assembly in the rear pass. The upper bank terminates into hanger tubes which areconnected to outlet header of the first stage superheater. The second stage superheater consists of pendantplaten which is of radiant parallel flow type. The third stage superheater pendant space is of convectionparallel flow type.Reheater: The function of Reheater is to reheat the steam coming out from high pressure turbine. Thereheater is composed of two sections. The front pendant section and rear pendant section.Burners : There are total twenty four pulverized coal burners for corner fired boilers and twelve oil burnersprovided each in between two pulverized fuel burners. An evident from name itself, these are used forburning pulverized coal or oil.Ignitors : There are twelve igniters per boiler. The atomizing air for igniters is taken from plant aircompressors at 7 kg /cm2 (gauge)Fig-1 shows a symbolic arrangement of various accessories of a 210 MW Boiler.