Boiler Air Preheater

Air preheater is one of the most important accessories in modern boilers. Air preheater is commonly found in all modern boilers. To increase the efficiency of the boiler accessories like air preheater is used in the boilers. 

The Air Pre-Heater reduces steam boiler fuel requirements by sending the Hot air to the Furnace which leads to completely burning of fuel and stabilize the temperature. The air heater design using either rotating heat transfer surface or rotating air distribution hoods predominates for utility air heating applications. The air heater arrangement may consist of one, two, three, or four air heaters, depending on the size of the unit and the degree of fuel flexibility.

 Air Pre heater’s primary objective is to extract the waste heat from the flue gases leaving the boiler.

Factors affecting while operating air preheaters

Some factors affect air preheaters while operating. The common factors are 

1. Corrosion at low temperature 

2. Fouling and plugging

3.Erosion

4.Fire

Advantages of air preheater in a boiler

1.The efficiency of the boiler is increased.

2.It is used as a source of heat for heating the air.

3. Fuel usage is reduced.

4. Quality combustion is achieved.

5.Furnace losses are reduced.