Table of Contents
What is the function of PA fan in boiler?
Primary air fans provide high-pressure air to the boiler system, which enters it through the APH. This air is used to dry coal and convey it to the furnace from the mill. It also feeds oxygen for primary combustion into the boiler.
What is the difference between forced draft fan and induced draft fan?
Forced-draft fans focus the pressure and volume at the outlet of the fan to push air through a system, creating positive air pressure. Industrial induced draft fans operate by focusing the pressure and volume at the inlet of the fan to pull air through a system.
How boiler works in thermal power plant?
It is an enclosed pressure vessel in which water is converted into steam by gaining heat from any source (coal, oil, gas etc). Boiler in thermal power plant accumulates the steam and build up a pressure to expend it in turbine and convert thermal energy to mechanical energy.
What are the advantages of forced Draught over induced Draught?
Advantages and disadvantages
| Induced draft – Axial fan | |
|---|---|
| + Low absorbed capacity Small foot print (requiring little space) | – Higher noise level Humid air stream drive |
| Forced draft – Centrifugal fan | |
| + Low noise level Easy maintenance Dry air stream drive | – Higher absorbed capacity |
How does an induced draft fan work?
An induced draught fan (ID fan) is provided to maintain a negative pressure in the furnace by sucking the products of combustion from it with a slight positive pressure at the discharge end vis-à-vis the bottom of the chimney/stack.
How does a thermal plant work?
How does Thermal Power Plant work? In thermal power plants, the heat energy obtained from combustion of solid fuel (mostly coal) is used to convert water into steam, this steam is at high pressure and temperature. This steam is used to rotate the turbine blade turbine shaft is connected to the generator.
What is the purpose of a PA fan in a power plant?
In power plants, the PA fans supply air for conveying of the pulverized coal from coal mills to the furnace area. These primary air fans produce a high pressure to push the coal and air mixture through pulverizer into the furnace.
What is a Papa fan in a thermal plant?
PA or Primary Air fans are most essential item in a thermal plant as it lifts and carry coal to destination. While coal is transported thru air from PAFan, it gets preheated so that moisture in the coal gets evoperated and coal does not remain sticky which is the basic requirement for air transportation of coal.
What is the function of primary air fan in thermal power plant?
The main function of the Primary air fan or PA fan is to carry the pulverized coal to the furnace as fuel for combustion. This process is used to create the steam that is the primary process in the thermal power plant.
What is the full form of PA fan?
First full form of PA fan is primary air fan. It is used to supply cool and hot air in coal mill. PA air is passed through air preheater and gets temperature. Then it mix with cold PA air with help of damper.damper control flow of air. After mixing it is supplied to coal mill bottom.