|
| MOQ: | 1 Set |
| Standard Packaging: | Sea worthy Packing for Export |
| Delivery Period: | 40 Days |
General Introduction
Air preheater is the heating surface where the flue gas in the tail flue of the boiler preheats the air before entering the boiler to a certain temperature through the internal radiator. It is a kind of equipment used to improve the heat exchange performance of the boiler and reduce energy consumption.Air preheater is usually divided into three types: plate type, rotary type and tube type.Taking the rotary type as an example, the working principle of the air preheater is introduced. A large number of unburned combustibles will deposit on the heat transfer elements, which may cause the air preheater to ignite. The cause of ignition and the countermeasures are described in detail. The shutdown analysis and air leakage control are also introduced in detail.
Air preheater is a kind of equipment which can improve the heat exchange performance of the boiler and reduce the energy consumption. The function of the air preheater is to heat the flue gas discharged from the tail flue of the boiler and transmit it to the air before entering the boiler through the radiator, so as to preheat the air to a certain temperature.
The air preheater is generally used for coal-fired boilers in power station.It can be divided into tubular type and rotary type. The rotary type can be further divided into wind hood rotary type and heating surface rotary type.Power stations usually use the heating surface rotary air preheater. Generally, the application in boilers is two-compartment, three-compartment and four-compartment, among which the four-compartment is more commonly used in CFB boilers.
Functions
Tubular Air Preheater
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 / in-line arrangement |
staggered arrangement / in-line arrangement |
| Sealing of pipe and plate |
Packing heat- resistant material/ welding |
welding |
| Anti-wearing |
a,when gas scours external tube, welcoming smoke tubes have protective tile b,when gas scours inside tube,wear casing pipes are installed in gas inlet. |
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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.
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|
| MOQ: | 1 Set |
| Standard Packaging: | Sea worthy Packing for Export |
| Delivery Period: | 40 Days |
General Introduction
Air preheater is the heating surface where the flue gas in the tail flue of the boiler preheats the air before entering the boiler to a certain temperature through the internal radiator. It is a kind of equipment used to improve the heat exchange performance of the boiler and reduce energy consumption.Air preheater is usually divided into three types: plate type, rotary type and tube type.Taking the rotary type as an example, the working principle of the air preheater is introduced. A large number of unburned combustibles will deposit on the heat transfer elements, which may cause the air preheater to ignite. The cause of ignition and the countermeasures are described in detail. The shutdown analysis and air leakage control are also introduced in detail.
Air preheater is a kind of equipment which can improve the heat exchange performance of the boiler and reduce the energy consumption. The function of the air preheater is to heat the flue gas discharged from the tail flue of the boiler and transmit it to the air before entering the boiler through the radiator, so as to preheat the air to a certain temperature.
The air preheater is generally used for coal-fired boilers in power station.It can be divided into tubular type and rotary type. The rotary type can be further divided into wind hood rotary type and heating surface rotary type.Power stations usually use the heating surface rotary air preheater. Generally, the application in boilers is two-compartment, three-compartment and four-compartment, among which the four-compartment is more commonly used in CFB boilers.
Functions
Tubular Air Preheater
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 / in-line arrangement |
staggered arrangement / in-line arrangement |
| Sealing of pipe and plate |
Packing heat- resistant material/ welding |
welding |
| Anti-wearing |
a,when gas scours external tube, welcoming smoke tubes have protective tile b,when gas scours inside tube,wear casing pipes are installed in gas inlet. |
|
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.
