Reduced bed agglomeration by co-combustion biomass with peat fuels in a fluidized bed

摘要: Fluidized bed combustion is an energy conversion technology that very suitable for biomass because of its fuel flexibility and low process temperatures. However, agglomeration material may cause severe operating problems. To prevent or at least reduce this, peat has been suggested as additive to the main fuels. Nevertheless, characteristics fuels vary there limited information effect different mechanisms behind prevention. The objectives present work were therefore to: (I) quantify potential positive by co-combustion with forest in terms initial temperatures; (ii) determine amount needed significantly tendencies; and, if possible, (iii) elucidate governing mechanisms. results showed all prevented studied interval 760-1020{sup o}C even little 5% was found have significant effects. also indicated mechanism prevention varies between Possible are minerals retain alkali, which then either elutriated up from captured themore » bed; calcium other refractory elements increase melting temperature thereby counteract alkali; sulfur reacts alkali metals sulfates prevents increased lowered viscosity. Results elemental analysis coating on particles mixtures resulted a decreased unchanged fraction potassium aluminum coatings. complex relationship inorganic contents process. 21 refs., 6 figs., 5 tabs.« less