Zhangjiagang HuaDong Boiler Co., Ltd. |
Verified Suppliers
|
|
Product Description
Boiler air preheater is to improve performance of heating change
for boilers, and reduce heat consumption. Air preheaters work to
transfer the heat carried by exhaust gas from boiler tail flue to
the air before entering the boiler through the cooling ribs, and
heat the air to a certain temperature.
Usually it is used for coal-fired boilers in power station. They
can be divided into tube-box type and rotary air preheaters.Rotary
type can be divided into wind hood rotary type and heating surface
rotary type. Generally boilers in power staion apply heating
surface rotary air preheaters. There are two warehouses, three
warehouses and four warehouses types in boilers application. Four
warehouses type are commonly used for CFB boilers.
Details
The main heat transfer component of tubular air preheater is thin-walled steel tube. The tubular air preheaters are mostly cubic. The steel tubes are arranged vertically and staggered with each other. Both ends are welded on the upper and lower tube sheets.The tubular air preheater is equipped with an intermediate tube sheet in the tube box. The flue gas passes through the preheater up and down the pipe, while the air passes through the preheater horizontally to complete heat transfer.
Tubular air preheater is widely used in power station boilers and industrial boilers because of its advantages of good sealing, high heat transfer efficiency, easy manufacturing and processing. The shortcomings of tubular air preheater are large volume, easy ash plugging of steel tube content, difficult cleaning and easy wear and tear at flue gas inlet.
Parameter
Layout item | Horizontal layout | Vertical layout |
Tube arrangement | staggered arrangement / | staggered arrangement / |
Sealing of pipe and plate | Packing heat- resistant material/ | welding |
Anti-wearing | a,when gas scours external tube, welcoming smoke tubes have
protective tile |
Enamel air preheater products are classified as following by
application
1.Enamel heat exchanger designed for denitration renovation
projects
2.Enamel heat exchanger for circulating fluidized bed boiler and
pulverized coal boilers Heat
exchanger parts for garbage incinerators and biomass boilers
3.Heat exchanger parts for grate furnaces, like chain grate
furnaces4.Heat exchanger parts for gas-fueled boilers, such as
kerosene boilers, coke ovens, etc.