Abstract

The paper presents results of experimental semi-technical investigations to limit the mobility of chlorine released in the form of hydrogen chloride from the fuel in the stoker-fired boiler furnace. In the combustion process, limestone and dolomite were used as the sorbents. The background for the research was a fuel containing a low gram fraction of chlorine, namely, extracted rapeseed meal supplemented with polyvinyl chloride (PVC) recyclate granules, to diversify the quantity of the quick-release chlorine. The research results indicate the tendency ofchanges of the hydrogen chloride concentration in the flue gas in relation to the amount of PVC added to the fuel, i.e., gram fraction of chlorine, amount of limestone and dolomite added to the fuel, as well as the molar ratio Ca/Cl 2 or (Ca + Mg)/Cl 2 , respectively. It has been proven that the greatest dechlorination capacity is exhibited by hydrated lime, lesser by limestone, and the least by dolomite, which, nonetheless, can be used under certain conditions for HCl bonding in boiler furnaces.

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