Basics of Steam Boiler Feb22

Basics of Steam Boiler...

Basics of Steam Boiler A steam boiler is an enclosed container where water is heated under controlled conditions to convert it into steam. Boiler is basically a heat exchanger where heat is transferred to water. It is also sometimes referred to steam generator. Thermal energy for heating water is supplied either by fuel (Gas, liquid or solid) or by waste energy available from various industrial processes. Sometimes solar energy is also used for the production of steam. Steam produced in a boiler can be low pressure, medium pressure or high pressure.  In an industrial context, the steam produced is used as process steam in various industrial processes or for driving turbines for the production of electricity. Every boiler is designed to transfer as much thermal energy as possible to the water contained in the boiler. Heat energy is transferred by conduction, convection and radiation. The relative percentage of each is dependent upon the type of boiler, the designed heat transfer surface and the fuels that power the combustion. There are mainly two types of boilers. They are fire tube boiler and water tube boiler. Fire tube boiler consists of numbers of tubes through which hot gasses are passed. These hot gas tubes are immersed into water, in a closed vessel. In this boiler one closed vessel or shell contains water, through which hot gas tubes are passed. These hot gas tubes heat up the water and convert the water into steam and the steam remains in same vessel.  Fire tube boilers are generally used for relatively small steam capacities and low to medium steam pressures. These boilers are compact, of packaged construction and cheaper. Water tube boiler is a kind of boiler where the water is heated inside tubes and the hot gasses surround...