Nox reduction in the UK

GE Energy has been awarded one of the first contracts in the European Union (EU) to help meet the lowered NOx emission limits recently set by the EU Large Combustion Plant Directive for 2008.

The contract was awarded by EDF Energy, the UK subsidiary of EDF Group, for its West Burton Power Station in Nottinghamshire. Under the contract, GE will deliver a turnkey NOx reduction system specifically designed for the facility.

The EU’s Large Combustion Plant Directive sets lower NOx emission standards for power stations across Europe with emission targets set for 2008 and 2015. GE’s NOx control solution for EDF Energy West Burton will achieve 400 mg/m3 NOx levels with a broad range of coals, 100mg/m3 lower than the 2008 limit.

To do so, GE will supply and install an advanced separated over-fire air (SOFA) system with triple-compartment over-fire air nozzles installed on the furnace corners and side walls. The SOFA system will stage the combustion process to reduce NOx emissions while maintaining optimised combustion conditions.

GE plans to complete the installation on the first unit in 2005, with subsequent installations on the other three EDF Energy West Burton units in 2006 and 2007, in time for full plant compliance with 2008 levels.

In previous applications of tangential-fired units, GE Energy has proven that advanced overfire air designs are capable of more than 50% NOx reduction from uncontrolled levels and 30-40% incremental NOx reduction over close-coupled air staging techniques.

GE will not make any modifications to EDF Energy West Burton’s existing burner systems, except for register/damper adjustments that might be necessary during system tuning and optimisation.

EDF Energy, one of the largest energy companies in the UK, employs more than 11,000 people and supplies gas and electricity to over five million customers. As one of the largest regulated and private network operators in the UK, EDF Energy distributes electricity to over a quarter of the UK population.

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