Fly ash elementary composition in a moving grate boiler fired with sulphur-doped woody fuel

• The elementary composition of fly ash particles in the size range of 0.03-1.64 mm were studied in a 7 MW moving-grate boiler fired with moist sawmill residues together with varying admixtures of elementary sulphur. Size segregated elementary analysis showed that the main elements were K, S, Cl and Zn and that there were no enrichment of any of these elements in any size fraction. When a sulphur admixture of 0.25 % was used the concentration of S increased, and the particles were almost completely depleted of Cl. Sulphur admixture had no significant effect on the concentration or distribution of the trace elements analysed.

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Bioenergiteknik

Bioenergy Technology

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