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Place of Origin: | China |
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Brand Name: | Dehai Boiler |
Certification: | ISO9001 , SGS , ABS , ASME |
Model Number: | Fin tube |
Minimum Order Quantity: | 1 Set |
Price: | Negotiable |
Packaging Details: | Seaworthy packing |
Delivery Time: | 45 Days |
Payment Terms: | L/C, T/T |
Supply Ability: | 800 Tons / Month |
Application: | Steam Generator Unit | Product Name: | Tubular Air Preheater |
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Fuel: | Biomass, Coal | Output: | Steam |
Color: | Customer's Requirement | Condition: | New |
High Light: | air to air heat exchanger,gas air heater |
Air Heaters Tubular for steam generator units High efficiency no damage to tube
Tubular type Air Preheater
Function and performance
This keeps the primary heater warmer than the dew point, or acid saturation point, in the primary air heater baskets or coils. If this drops below the acid saturation temperature – usually between 87.8 °C and 110 °C, or sometimes at temperatures as high as 126.7 °C – there is a considerable risk of dew point corrosion damage3.
Without preheated air, flue gas products will corrode the heat transfer surfaces, partially block airflow and, in extreme cases, limit the power capacity of the unit. While playing a critical role in increasing boiler efficiency, preheating is only effective if the air heater is maintained and kept clean of air-side fouling
Advantages
1. Preheated air increases combustion rate and then increases steam generations of boiler.
2. Due to higher temp. of air,furnace temp.increases,so low grade coal can be burnt efficiently.
3. Air heated by heat of exhaust gases.It reduces fuel consumptions.Therefore thermal efficiency of boiler increased.
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 |