The composite stack liners were manufactured using Tunetanken’s winding technology.
The composite liners were installed in a combined steel housing that was shipped to the plant site.The incineration plant in Bergen, Norway, is operated by BiR Avfallsenergi, a company owned by various municipalities to convert waste that otherwise would have to be landfilled into energy.
Incineration exhaust is sent through two 75 m (246 ft) tall stacks in a combined housing made of steel. The Tunetanken composite liners were installed in the housing by chimney manufacturer Steelcon AS, Denmark, before the lined housing was sent to the plant for erection.
One composite liner is 69 m (226.4 ft) tall, while the other is 72 m (236.2 ft) tall. Both liners are 1400 mm (55.1 inches) in diameter.
One liner must withstand an operating temperature of 150°C (302°F) and exposure to 180°C (356°F) for up to one hour. To meet these requirements, the liner was made with Vipel F086 epoxy novolac vinyl ester resin supplied by AOC.
The design temperature for the other liner is 130°C (266°F), and the maximum one-hour exposure temperature is 160°C (320°F). This liner employs AOC's Vipel F085 epoxy novolac vinyl ester resin.
Tunetanken manufactured the liners by filament winding resin-impregnated E-glass roving over a cylindrical mandrel. Each liner was made in three sections that were joined using composite lamination in the field. The longest individual section was 27 m (88.6 ft).
Laminated joints and the top section of each liner were manufactured using hand lay-up. To improve the corrosion resistance of interior surfaces 2.5 mm (0.1 inch) thick barrier layers were formed with resin-impregnated ECR veils.
“The Vipel epoxy novolac vinyl esters are easy to process for both our winding and hand lay-up operations,” reports Tunetanken Administrative Director Henrik Kjærholm. “AOC also has a very fast and helpful team when we need resin chemical resistance data and performance specifications.”
Located in Vejen, Denmark, Tunetanken has more than 40 years experience in the design and manufacturing of corrosion-resistant composite parts and systems.