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Reburning is primary NOx reduction technology which involves injection of a hydrocarbon (typically coal or gas) into the furnace above the primary combustion zone. This produces a fuel-rich region where the NOx formed in the Primary Zone is reduced by reaction with the hydrocarbon radicals into harmless molecular nitrogen (N2). Combustion air is introduced further downstream (Burnout Zone) to complete the combustion of any unburned coal and gaseous products from the Reburn Zone.
- Capable of NOx reductions of up to 50% compared to uncontrolled levels. Cost-effective alternative to SCR
- Easy to retrofit
- Stand alone or cascaded with other technologies
- Controllable fuel and air mixing characteristics (optimised by CFD modelling)
- Minimal impact on boiler performance
- Maintain fuel and operational flexibility
- Minimal boiler fouling
- No on-site storage of hazardous chemicals
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