Ceramics-Silikáty 54 (1) 85-88 (2010)

THE CAUSATION OF HIGH LIMESTONE CONSUMPTION IN COAL DESULFURIZATION FLUIDIZED BED BOILER

P. Buryan, J. Vejvoda, J. Krátký, L. Veverka

Laboratory research of the reactivity of limestone used for desulfurization of coal fluidized bed boilers have shown that reactivity of CaO after limestone calcination process in boiler is significantly influenced by reactions of CaO with SiO₂, Al₂O₃ and Fe₂O₃ contained in ash. The reaction products do not react with SO₂ and consumption of limestone should be extremely high. Quantity and composition of the formed compounds influence of surface of CaO produced from limestone at high temperatures. It is useful to take into account the influence of the compounds coming from coal and limestone found in laboratory tests.

Keywords: Limestone, Fluidized bed boilers, Flue gas desulfurization