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Composites Withstand Waste-to-Energy Exhaust Heat

04 December 2009

Tunetanken have recently obtained a contract to provide fibre-reinforced polymer (FRP) composite chimney liners for a modern waste-to-energy incineration plant.

Incineration exhaust is so hot that 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 from AOC Resins.

The design temperature for a second liner was 130°C (266°F), with a maximum one-hour exposure temperature of 160°C (320°F). These requirements are met with Vipel F085 epoxy novolac vinyl ester.

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 meters (88.6 feet).

Laminated joints and the top section of each liner were manufactured using hand lay-up. To improve the resistance of interior surfaces exposed to the hot and corrosive exhaust, 2.5-millimeter (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,” said Tunetanken Administrative Director Henrik Kjærholm. “AOC also has a very fast and helpful team when we need resin chemical resistance data and performance specifications.”

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 useful energy. Incineration exhaust is sent through two 75-meter (246-foot) tall stacks in a combined housing made of steel.

The liners were installed in the housing by Tunetanken customer, chimney manufacturer Steelcon A/S, Esbjerg N, Denmark, before the lined housing was sent to the plant for erection.

One liner is 69 meters (226.4 feet) tall, while the other is 72 meters (236.2 feet) tall. Both liners are 1400 millimeters (55.1 inches) in diameter.





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