Important Terms for Steam Boilers

Important Terms for Steam Boilers:

Though there are many terms used in steam boilers, yet the following are important from the subject point of view:

    ⤷ Boiler Shell:

        🔹 It is made up of steel plates bent into cylindrical form and riveted or welded together. 
        🔹 The ends of the shell are closed by means of end plates. 
        🔹 A boiler shell should have sufficient capacity to contain water and steam.

    ⤷ Combustion  Chamber:
        🔹 It is the space, generally below the boiler shell, meant for burning fuel in order to produce steam from the water contained in the shell.
Steam Boiler


    ⤷ Grate:
        🔹 It is a platform, in the combustion chamber, upon which fuel (coal, wood) is burnt. 
        🔹 The grate generally consists of cast iron bars which are spaced apart so that air (required for combustion) can pass through them. 
        🔹 The surface area of the grate, over which the fire takes place is called grate surface.

    ⤷ Furnace:

        🔹 It is the space, above the grate and below the boiler shell, in which the fuel actually burnt. 
        🔹 The furnace is also called fire box.

    ⤷ Heating Surface:

        🔹 It is that part of the boiler surface, which is exposed to the fire (or hot gases from the fire)

    ⤷ Mountings:

        🔹 These are the fittings which are mounted on the boiler for its proper and safe functioning. 
        🔹 They include water level indicator, pressure gauge, safety valve etc. 
        🔹 It may be noted that a boiler cannot function safely without the mountings.

    ⤷ Accessories:

        🔹 These are the devices, which form an integral part of a boiler, but are not mounted on it. 
        🔹 They include superheat, economizer, feed pump etc. It may be noted that the accessories help in controlling and running the boiler efficiency.

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