EGGBOROUGH TURN KEY PROJECT

200 m stacks - Power plant
British Energy Eggborough - UK

Composite Stack Mastership
Height 200 meter Diameter 6 meter

Challenge
For the first time in the history of power generation in the UK reinforced plastics were selected as the material of choice for the 2 new flue liners on the chimney at Eggborough Power Station.
The long term consideration for the design of the liners was firstly the materials ability to withstand the high operating temperatures of the wet flue gases of S02/SO3.
Design temperature 150ºC, and the mechanical stress induced in the liner during the daily startup and shutdown of the plant with the resulting temperature cycling.  

Solution
Each liner being 5.9 m Ø and 180 m high posed additional design considerations as the liner weight of 86,000 kg precluded supporting from the base due to the high compressive loads.
It was decided to hang the liners from the top of the concrete windshield and an elaborate series of supports and sliding joints absorbed the loads and thermal expansion.

Result
The speed of this installation process, 23 days for each flue, minimised the plant shutdown and was an important factor in the clients decision making process for selecting our materials for this application.
The stacks have now been in service for more than 2 years and during the last annual inspection the laminate was found to be in excellent condition with no signs of any deterioration or corrosion.

WHY COMPOSITE?

• High temperature resistance
• Excellent corrosion resistance
• Easy and fast installation
• Light weight