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Indirect Air Heaters

Indirect Air Heaters

Indirect air heaters

STELA indirect air heaters are applied in processes where mixing of the flue gas with the air to be heated up is unrequested, e. g. when drying breadstuff with fuel oil. STELA indirect air heaters are certified by the German Technical Control Board and have a certified efficiency of 90 % with outlet temperatures up to 120 °C.

Indirect Air Heaters
indirect operation

Indirect Air Heaters
direct operation

Hot air generation with indirect air heater

The indirect air heater consists of an outer casing, an intermediate casing against radiation losses, gas passes and a closed combustion chamber made of highly heat-resistant steel, which is arranged centrically in the casing. Here the heating energy is transmitted to the fresh air only via the heat exchanger surfaces of the closed combustion chamber and the gas passes. The cooled combustion gases are drawn off into the open air via a chimney. Thus the hot air is completely free of flue gases.

Indirect Air Heaters
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Agricultural Dryer
- Stationary Dryer
- Mobile Circulating Batch Dryer MUF
- Mobile Continuous Mixed Flow Dryer Universal

Belt Dryer
- for Sawdust, Pellets, Wood Chips and other Biomasses
- for Digestates
- for Sewage Sludge
- for Breakfast Cereals
- for Pet Food
- for Other Products

Dryer for Waste Heat Recovery for Biogas Plants

Drum Dryer

Feed and Turn Dryer

Air Heater
- Indirect Air Heaters
- Direct Air Heaters

Electrical Engineering / Moisture Content Measuring

- Stationary Agricultural Dryers
- Mobile Agricultural Dryers
- Belt Dryers
- Belt Dryers for Sewage Sludge
- Belt Dryers for Extrudates
- Feed-and-Turn Dryers

STELA History

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