Fluidized bed combustion technology was commercialized in the 1970s. One of the main success factors of fluidized bed combustion technology has been the capability of handling a wide variety of solid fuels. Today's trend towards inexpensive and greener biomass-based energy sources sets new challenges for combustion technologies. For example, the properties and behavior of fuel ash may limit the use of such fuels due to the increased risk of bed agglomeration, fouling or corrosion. New innovations and a great deal of experimental work are needed to widen the fuel scale towards "green" and demanding fuels. Kvaerner Power has been manufacturing fluidized bed boilers since the 1970s. To date it has delivered over 120 BFBs and over 60 CFBs. The largest BFB in operation produces 110 kg/s steam, and the largest CFB produces 194 kg/s. One significant fact is that most of the boilers delivered are industrial boilers producing power for industrial processes. Jarvi-Suomen Voima Oy's 81 MW{sub}(fuel) power plant is a good example of where innovative technology development has enabled combined heat and power production for the adjacent plywood mill and local community. The power plant is located in the town of Savonlinna, Finland, and the technology is based on state-of-the-art bubbling fluidized bed combustion. The steam capacity of the boiler is 72 MW{sub}(th) and the power output of the plant is 17 MW{sub}e achieved with steam values of 28.1 kg/s at 92 bar and 523°C, by the co-combustion of mill residues; bark, plywood residue and grinding dust, together with other local fuels such as forest residue and peat.
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