An air preheater (APH) is a general term used to describe any device designed to heat air before another process (for example, combustion in a boiler) with the primary objective of increasing the thermal efficiency of the process. They may be used alone or to replace a recuperative heat system or to replace a steam coil.
Purpose of air preheater
The purpose of the air preheater is to recover the heat from the boiler flue gas which increases the thermal efficiency of the boiler by reducing the useful heat lost in the flue gas. As a consequence, the flue gases are also conveyed to the flue gas stack (or chimney) at a lower temperature, allowing simplified design of the conveyance system and the flue gas stack. It also allows control over the temperature of gases leaving the stack (to meet emissions regulations, for example).
Advantages
1.Improve and strengthen the combustion when crosses air preheater then enters the furnace, accelerates the fuel drying, the ignition and combustion process, ensures stable combustion in the furnace, and it is good for improving, strengthening the combustion effect.
2.Strengthen heat transfer due to improved and intensified combustion furnace, and the hot air temperature in the furnace is improved, the average temperature level in the furnace is improved, thereby strengthening the furnace radiation heat transfer.
3.It reduces the loss of the furnace, reduces flue smoke temperature, improves the thermal efficiency of boiler.The flue smoke waste heat is used by the air preheater, further reducing the exhaust smoke loss. According to experience, when the temperature is raised 1.5ºC in the preheater , exhaust temperature can be reduced to 1 ºC. After Installing air preheater in boiler flue, if the air can be preheated to 150~160 ºC. It can reduce the flue gas temperature of 110~120 ºC, the boiler can be improved thermal efficiency of 7%~7.5%, can save fuel 11%~12%.
Company profile:
Shandong Hengtao Energy Saving & Environment Protection Co., Ltd. established in 2003, which is specialized in designing, manufacturing, engineering, supplying of boilers, boiler components and boiler auxiliaries.
Our main products including CFB boiler, coal fired boiler and boiler parts such as tubular air pre-heater, rotary air pre-heater, super heater, re-heater, header, membrane water wall and economizer. We are also the provider for boiler integrated energy-saving solutions and we have EPC qualification.
Welcome Your Inquiry and Hope We Could Cooperate With Each Other!
Audited Supplier 
){kind=link}