The air preheater is the heating surface where the flue gas in the tail flue of the boiler preheates the air before entering the boiler to a certain temperature through the internal radiator. It is used to improve heat exchangeability of boilers and reduce energy consumption.

Generally referred to as air preheater.It is mostly used in coal-fired utility boilers.It can be divided into tube box type and rotary type.The rotary type can be divided into wind hood rotary type and heating surface rotary type.The rotary preheater with heating surface is often used in power plant boilers.Generally,the application in boilers is two-compartment,three-compartment and four-compartment,among which the four-compartment is more commonly used in circulating fluidized bed boilers.

The working principle of the tube box preheater is relatively simple.The flue gas flows through the outside of the tube box,and the aire passes through the inside of the tube box.The heat is transmitted through different temperature differences.The principle is the same as that of economizer and super heater.

Products Case

Exported Air preheater to Indonesia