Carbon Steel Boiler Tubular Air Preheater To Improve Thermal Efficiency For Coal Fired Boilers

 
Product advantages
 
1.High corrosion resistance property;
 
2.Small covering area;
 
3.Pipe and tube plate in every link between separated, the heated bilges cold heat distortion is not bound to avoid stress destruction;
 
4.Single pipe, tube single or parts of equipment failure does not affect the heat normal operation, two fluid were heat tube, can go outside fin

Functions

1. Improve and enforce combustion
The air through the heat exchanger enters the furnace, which accelerates the drying, ignition and combustion process of the fuel, ensures the stable combustion in the boiler and improves the combustion efficiency.
 
2, Enhance heat transfer
Because the combustion in the furnace has been improved and strengthened, and the temperature of hot air entering the furnace has been increased, the average temperature level in the furnace has also been raised, so the radiation heat in the furnace can be strengthened.
 
3,Reduce the loss of the furnace, lower the exhaust gas temperature and improve the thermal efficiency of the boiler
Because of the stable combustion in the furnace and the enhanced radiation heat exchange, the chemical incomplete combustion loss can be reduced. On the other hand, the air preheater uses the waster heat of flue gas to further reduce the loss of the exhaust gas, thus improving the thermal efficiency of the boiler. According to experience, when the air in the preheater rises by 1.5 degrees, the exhaust gas temperature can be reduced by 1 degree. After installation of the air preheater in the boiler, if the air temperature can be raised by 150-160 degrees by the waste heat, the exhaust gas temperature can be reduced by 110-120 degrees, and the thermal efficiency of the boiler can be increased by 7-7.5E%. Fuel can be saved by 11-12%.
 
4,Hot air can be used as fuel disiccant.
For layer boilers, if there is hot air, fuels with higher moisture and ash content can be used. For power station boilers, hot air is an important desiccant and pulverized coal conveying medium in grease powder system.

Classification

According to the way of heat transfer, the air preheater can be divided into two types:heat conduction type and regeneration type.Among the heat conduction type, tubular air preheater is most commonly used.With the increase of boiler parameters and capacity, the heating surface of tubular air preheater increases, which brings difficulties to the arrangement of the tail heating surface. Therefore, most of the large capacity units adopt a compact, light weight rotary air preheater. Air preheater is generally divided into three types: plate type, rotary type and tubular type.
 
 
 
Parameter
 

 
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.