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Steam-Boilers

By Ashik
Boiler:
A boiler or steam generator is a device used to create steam by applying heat energy to water.
Fuel used in Boiler:
The source of heat for a boiler is combustion of any of several fuels, such as wood, coal, oil, or
natural gas. Electric steam boilers use resistance- or immersion-type heating elements. Nuclear
fission is also used as a heat source for generating steam. Heat recovery steam generators
(HRSGs)use the heat rejected from other processes such as gas turbines.
Types of Boiler:
There are several types of boiler. Among, few of them given below;

Fire tube boiler:In this type of boiler, boiler/ vessel is partially filled with water. The boiler is
equipped by the large no. of tubes through which fuel is being passed. During the fuel burning,
huge amount of heat generate and passes through the water and water vaporized. The following
figure is a fire tube boiler.







 Water tube boiler:This type of boiler is exactly same with fire tube boiler except that water is
passing through the pipes and fuel is burned into the vessel.









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