Boiler is widely used in power plant industries, sugar industries, textile industries,chemical industries, cement plant and other process work. Boiler is first invented and used in 18th century by England. A boiler, which is also known as steam generator, is a mechanical machine which is used to convert water into steam. First it was introduce in the 18th century. It was named as boiler because initially, it was use to boil water and convert it into steam.
Types:
There are many types of boilers. Listed as followed:
According to the axis of boiler:
Horizontal boiler
Vertical boiler:
Inclined boiler:
According to fire:
Externally Fired boiler
Internally fired boiler
According to pressure of boiler:
High Pressure boiler
Low pressure boiler
According to circulation of water:
Forced circulation boiler
Natural circulation boiler
According to circulation of gases:
Fire tube boiler
Water tube boiler
Boiler Accessories:
Those parts which are used to increase efficiency of a boiler and boilers can perform safely without these parts are known as boiler accessories. These parts are as follow.
1. Feed pump:
Feed pump is use to pump the water in boiler for continuous working. The feed pump is run by the electricity or by an steam turbine. The steam use to drive the turbine taken by the boiler itself, which increase the boiler efficiency.
2. Super heater:
The steam generate by the boiler is saturated steam. If this steam is use in turbine, it may cause corrosion. So the steam is superheated before taken out for process work. This is done by super heater.
3. Economizer:
Economizer is use to preheat water before it enter into Boiler Drum. The economizer uses the heat of flue gases to preheat the water. The flue gases coming out from boiler, first passes through economizer and then to atmosphere. It increases the efficiency of boiler.
4. Air preheater:
Air preheat is use to preheat the air. It is preheated by the exhaust gases of boiler. So it also increase efficiency of boiler. The heated air enters into boiler,
