BIOMASS FUELS WORLD PULP&PAPER 102 “Today it is possible to convert a pulp mill into a fossil-free mill and thus reduce the mill’s carbon footprint and fuel costs”. Figure 1. Typical wood-base biomass fuels used for direct fired rotary kilns range from wood chips and pellets to saw dust. Figure 2. Controlling the flow of wood into the kiln is an important factor in stable kiln operation. and fuel consumption when increasing the moisture in wood powder. The values are compared with the main fossil fuels oil and natural gas. Controlling the flow of wood into the kiln is an important factor in stable kiln operation. Unstable flow will cause a variation in heat input to the burning zone, impacting product quality. The lime kiln burner needs to be flexible and able to safely and efficiently burn several different types of fuel. SUITABLE SOLUTION FOR BOTH OLD AND NEW MILLS “We have shown during the last decade that wood powder firing has become a fully commercial, proven and – most importantly – safe solution for lime kilns. Today it is possible to convert a pulp mill into a fossil-free mill and thus reduce the mill’s carbon footprint and fuel costs,” says Claus Jensen-Holm, Director for Lime Kiln Technology at Valmet. Valmet has delivered several wood powder firing systems utilising sawdust, pellets or wood chips. SCA’s Munksund