The redesign of chain grate stoker links to reduce pollutant emissions: aerodynamic design

Pollutant emissions from chain grate stoker furnaces may be attributable, in the main, to poor combustion air distribution to the fuel burden. A better distribution of air may be achieved by modifying the aerodynamic features of the individual grate links. A combination of flow visualisation, computational modelling and velocity measurements is used to aid in the redesign of a traditional link design. The flow improvements to the redesigned link are demonstrated.