Views: 0 Author: Site Editor Publish Time: 2026-01-30 Origin: Site
In paper manufacturing, thermal efficiency, corrosion resistance, and long-term operational stability are critical. The oval finned tube heat exchanger with three-pass stainless steel elliptical tubes, designed as a steam coil, is a proven solution for air heating and process heating duties in paper factories. This design combines high heat transfer efficiency with excellent fouling resistance and mechanical strength, making it well suited for harsh mill environments.
The oval finned tube heat exchanger uses elliptical (oval) stainless steel tubes mechanically or metallurgically bonded with fins to maximize heat transfer while minimizing air-side pressure drop. A three-pass steam flow arrangement ensures optimal utilization of steam energy and uniform temperature distribution across the coil face.
Steam flows inside the elliptical tubes, while air or process gas passes over the finned exterior, absorbing heat efficiently.
Reduced air-side resistance compared with round tubes
Improved heat transfer coefficient
Lower dust and fiber accumulation, ideal for paper mill air streams
Stainless steel construction provides excellent resistance to corrosion and condensate-related attack
Steam flows through the coil in three stages
Maximizes temperature gradient and heat extraction
Ensures even surface temperature, preventing hot spots and thermal stress
Improves overall steam utilization efficiency
Aluminum or stainless steel fins bonded to the tube surface
Enlarged heat transfer area for compact coil design
Stable fin attachment for long-term operation under thermal cycling
Designed for continuous operation in high-humidity, dusty environments
Reinforced tube sheets and headers
Suitable for horizontal or vertical installation
| Advantage | Benefit |
|---|---|
| Low air pressure drop | Reduced fan power consumption |
| High heat transfer efficiency | Faster air heating and stable process temperatures |
| Anti-fouling tube shape | Less fiber buildup, easier cleaning |
| Stainless steel wetted parts | Long service life with steam and condensate |
| Uniform heating | Improved drying consistency |
This steam coil heat exchanger is widely used in:
Paper machine hood air heating
Drying section make-up air heaters
Process air preheaters
Waste heat recovery air systems
Pulp and paper plant HVAC units
It is particularly effective where high airflow rates, steam heating, and fiber-laden air are present.
Tube material: Stainless steel (SS304, SS316, or equivalent)
Fin material: Aluminum or stainless steel
Casing/frame: Carbon steel or stainless steel
Steam pressure: Designed according to project requirements
Connection type: Flanged or threaded steam inlet/outlet
Custom configurations are available to match existing ductwork, airflow conditions, and steam parameters.
The elliptical tube geometry significantly reduces dust and fiber deposition, lowering maintenance frequency. Smooth condensate drainage inside the tubes prevents water hammer and corrosion, while stainless steel construction ensures long-term reliability in wet and chemically aggressive environments common in paper factories.
The oval finned tube heat exchanger with three-pass stainless steel elliptical tubes is an efficient and durable steam coil solution for paper factory applications. Its optimized airflow characteristics, high heat transfer efficiency, and resistance to fouling and corrosion make it an ideal choice for air heating and drying processes in modern pulp and paper plants.
