Studium vlivu obsahu CaO a dalších majoritních složek v popílku na přerozdělení toxických prvků při spalování uhlí

Abstract

The graduation theses deals with the influence of CaO, Al2O3, MnO and Fe2O3 content in ashes and fly ashes on the behaviour of elements (S, Cl, V, Cr, Co, Ni, Cu, Zn, As, Se, Br and Pb) during coal combustion in two fluidised-bed combustion units – in thermal power station Zlín and in circulating fluidised-bed power station. The significant influence of MnO, Al2O3 and Fe2O3 content in ash fraction on the retention of the studied elements was observed neither in Zlín thermal power station nor in the fluidised-bed power station. The effect of CaO content in ash on the behaviour of elements was different for both combustion units. In fluidised-bed power station only relation between CaO and S content was observed, whereas in thermal power station the positive effect of CaO on the retention was obtained in case of S, Cl, Br, As, and Se (which was also verified by a series of laboratory combustion tests).