Plate Air Preheater
Plate air preheater is an energy-saving and environmentally friendly heat recovery device. Flat or corrugated plates are welded or mechanically fixed around the periphery to form plate packs, and the full unit adopts a modular building-block design with flexible configurations and strong structural adaptability. It is designed to recover waste heat from industrial exhaust gases and transfer it to incoming combustion or process air, improving thermal efficiency, reducing fresh fuel demand, and lowering emissions. With proprietary Air Film technology, it can effectively mitigate acid dew point corrosion and is widely used in refining, chemical, steel, metallurgy, and power industries.
Product Details
What is Plate Air Preheater?
Plate Air Preheater is a gas-to-gas heat exchanger used to recover heat from hot exhaust gas and transfer it to incoming combustion or process air. It typically operates in counterflow or crossflow arrangements using flat or corrugated metal plates that form alternating hot and cold flow channels. By recovering waste heat, it improves system efficiency, reduces fuel consumption, and lowers greenhouse gas emissions.
Why choose a plate air preheater?
Compared with conventional tubular air preheaters, plate air preheaters offer a much larger heat transfer surface area per unit volume, higher heat transfer coefficients, compact structure, lower weight, and strong flexibility through modular assembly. Air Film technology, corrosion-resistant materials, bypass regulation, and graded material selection can also help address acid dew point corrosion and reduce lifecycle cost.
How is it designed and manufactured?
The product is based on modular heat transfer units such as X brick, E brick, C brick, and S brick, which simplify transportation and on-site assembly for large systems. Design also considers material selection, airflow configuration, thermal stress management, and corrosion protection. Measures such as thermal compensation, expansion joints, low-CTE material use, predictive analysis, and bypass control help ensure durability, heat recovery performance, and operational safety.
Key Advantages
Technical Specifications
| Max Area | 40000㎡ |
|---|---|
| Plate Material | 304, 316L, 2205, 310S, 904L, Corten-A |
| Design Pressure | Vacuum ~ 0.6MPa |
| Plate Thickness | 0.6 ~ 2.0mm |
| Design Temperature | -20 ~ 800℃ |
Product Applications
Industrial flue gas waste heat recovery
Plate Air Preheater recovers heat from hot flue gas or exhaust gas and transfers it to incoming combustion air or process air. This gas-to-gas heat exchange duty improves system efficiency, reduces fuel consumption, and supports energy-saving operation in boilers, furnaces, kilns, and process plants.
Advantages
- Compared with tubular air preheaters, the plate structure provides larger heat-transfer area per unit volume and lower equipment weight.
- Modular assembly supports flexible sizing for different exhaust gas volumes and temperature programs.
- Corrosion-resistant materials, bypass arrangements, and air-film designs can help manage dew-point corrosion risks.
Used In
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