Experimental quantification of lateral mixing of fuels in fluid-dynamically down-scaled bubbling fluidized beds

• This work presents two methods for evaluating the lateral dispersion coefficient in a fluidized bed for three different fuel types, namely wood chips, pellets and char of pellets. Mixing of the different fuels is also related to the mixing of bed material to evaluate to what extent they are correlated. The experimental work is conducted in fluid-dynamically downscaled fluidized beds and the validity of this approach is shown by replicating an experiment presented in literature which was conducted in a large scale boiler.The two methods, a direct one and an indirect one, are shown to yield similar results which suggest that both of them are robust.The wood chips and pellets are found to behave similarly and to follow the flow of bed material well. On the other hand char particles are found to be less influenced by the flow of bed material and char particles are also more sensitive to changes in the pressure drop over the gas distributor compared to wood chips and pellets.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Energiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Energy Engineering (hsv//eng)

TEKNIK OCH TEKNOLOGIER  -- Kemiteknik -- Annan kemiteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)

Nyckelord

Glicksman's scaling

Fuel lateral mixing

Fluidized bed

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