Steam Air Heaters for Efficient Industrial Air Heating

Main Features

• Finned tube heat exchanger type using steam to heat up gaseous media (e.g. air), also called steam air heaters, steam heat exchangers or steam coil air heaters
• Customized according to client specification and request (e.g. equippable with air pre-heater recuperator or with optional electrical or oil heater to reach higher temperatures)
• Insulated housing (fully welded, sanitary design) and extractable elements
• Condensate cooling and innovative safety system (see below)

Selected Project References

Main Steam and Thermal Oil Air Heater (Project In Ireland)

Materials And Characteristic Values

• Housing: Stainless steel (AISI 304 or AISI 316) with mineral wool insulation
• Finned tubes: Stainless steel (AISI 304 or AISI 316)
• Fins: Aluminum or stainless steel
• Air volume: up to 150’000 kg/h per device
• Discharge temperature: 80 to over 200 °C, depending on steam pressure, or more than 300°C with optional electrical or oil heater
• Steam pressure: up to 70 bar

Condensate Cooling

• Use of flash steam and condensate of the steam coils to pre-heat the process air
• Separate flash steam and separate condensate stage, for stable running conditions at different capacities
• Returning of water without any flash steam to the tank

Safety System

• Innovative and field-proven system consisting of pressure sensors, valves and bypass piping
• To avoid steam hammers which caused a quite long history of damage at steam heat exchanger units without safety system
• Steam hammers occur when the heater coils fill up with water especially during low capacity cases