27-12-2012, 06:07 PM
BOILER OPERATION AND EXTENTION OF LIFE
BOILER OPERATION.pptx (Size: 401.15 KB / Downloads: 33)
What is Boiler
A boiler is used to generate steam at a desired pressure and temperature by transferring heat produced by burning fuel to water to change it to steam
Types Of Boiler
Fire tube boiler: In this type of boiler, hot gases pass through the tubes and water surrounds them. Heat from the gases (produced by combustion) is transferred to water, which is then converted to steam.
Boiler Operations
The boiler operator is responsible for operating and maintaining the boiler in a safe and efficient manner through the use of sound engineering.
Most boiler accidents are caused by operator error and poor maintenance.
FD Fan:
Forced draft fan is used to supply air for burning of coal in the boiler furnace; it also supplies cold air to the pressurized hot air to obtain the desired temperature in the coal mill for drying the coal.
PA Fan:
Primary air fan supplies coal /air mixture by pressurized hot air.The air is heated by APH and supplied to coal mill and thus the pressurized hot air supplies coal-to-coal pipes.
Economiser
The purpose of the economiser is to pre-heat the boiler feed water before it is introduced into the steam drum & to recover some of the heat from flue gases leaving the boiler