1. ATHCO-Engineering A/S
Production of district heating through heat recovery and flue gas cooling
Kristian Iversen
Business Development Manager
ATHCO Engineering

2. Pillow plate characteristics
Two thin (0.8 to 2.5 mm in this case) stainless steel plates welded together along the sides and at the ends.
In the middle, plates are spot welded together.
After welding, the plates are hydraulically expanded by either water or gas

3. Heat transfer characteristics of pillow plate air-to-water exchanger
Water flows inside the plate. Welded spot pattern ensures turbulent flow: Excellent heat transfer
Free air flow between the plates:
Low air pressure drop
Suitable for dust loaded air
Easy cleanable by CIP

4. Process Therm: recovering heat from exhaust gasses
Maintence-free in dust loaded air
No expensive stops: delivered with built-in CIP system
Heat recovery with condensation of moisture
Various high alloy materials can be used to obtain long life time
Fast break-even
Significant CO2 reduction
Fully integrated CIP System

5. Heat recovery at two carpet factories of Egetæpper in Denmark
Locations: Gram and Herning
Two and one recovery units (400 to 1600 kW) recovering heat from carpet ovens
Estimation production: 2350 and 5000 MWh heat/year
District heating water is heated directly in exchangers
Part of the heat is used internally
Pay-back time < 3 years

8. Flue gas condensers
Heat recovery after combustion process – e.g. power plant, CHP, etc.
Heat recovery up to 15 MW/unit
Module building possible for large heat sources
Much more compact than shell-tube flue-gas condensers

9. What can we deliver? Maintenance free heat recovery units Compact size
Low pressure drop
Excellent in dust loaded environments
Complete installations with pump stations, air preheaters, water-water exchangers
Possibility of installing units
Design of units and thermal calculation of heat recovery project

10. What are we looking for?
Companies working with biomass power plants/CHP
Companies working with heat recovery of industrial exhaust gasses
End users
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