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Last update: 25/09/2017

Flue gas recirculation

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As an alternative to overfire air systems using only fresh air, we also offer flue gas recirculation. This involves branching off flue gases downstream of the dust removal facility and returning them to the furnace to replace some of the overfire air. Not only are combustion-related pollutants minimized, but the thermal efficiency of the whole plant is improved and the flue gas burden emitted into the environment is reduced.

 

The recirculated flue gases are injected into the furnace via separate nozzles. Any overfire air still required for secondary combustion is fed in via different nozzles.

 

The recirculated gas ducts are insulated in order to prevent corrosive compounds from condensing on the walls and to keep heat loss at a minimum.